/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:27:48,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:27:48,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:27:48,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:27:48,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 21:27:48,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:27:48,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:27:48,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:27:48,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:27:48,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:27:48,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:27:48,930 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:27:48,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:27:48,930 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:27:48,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:27:48,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:27:48,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:27:48,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:27:48,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:27:48,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:27:48,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:27:48,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:27:48,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:27:48,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:27:48,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:27:48,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:27:48,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:27:48,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:27:48,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:27:48,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:27:48,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:27:48,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:27:48,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:27:48,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:27:48,934 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:27:48,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:27:48,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:27:49,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:27:49,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:27:49,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:27:49,272 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:27:49,273 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:27:49,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl [2021-06-05 21:27:49,274 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl' [2021-06-05 21:27:49,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:27:49,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:27:49,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:27:49,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:27:49,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:27:49,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/1) ... [2021-06-05 21:27:49,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/1) ... [2021-06-05 21:27:49,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:27:49,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:27:49,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:27:49,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:27:49,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/1) ... [2021-06-05 21:27:49,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/1) ... [2021-06-05 21:27:49,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/1) ... [2021-06-05 21:27:49,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/1) ... [2021-06-05 21:27:49,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/1) ... [2021-06-05 21:27:49,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/1) ... [2021-06-05 21:27:49,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/1) ... [2021-06-05 21:27:49,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:27:49,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:27:49,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:27:49,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:27:49,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:27:49,443 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:27:49,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:27:49,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:27:49,444 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:27:49,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:27:49,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:27:49,445 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:27:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:27:49,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:27:49,446 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:27:49,814 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:27:49,814 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 21:27:49,815 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 21:27:49,816 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:27:49 BoogieIcfgContainer [2021-06-05 21:27:49,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:27:49,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:27:49,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:27:49,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:27:49,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:49" (1/2) ... [2021-06-05 21:27:49,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd47b97 and model type unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:27:49, skipping insertion in model container [2021-06-05 21:27:49,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:27:49" (2/2) ... [2021-06-05 21:27:49,822 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.bpl [2021-06-05 21:27:49,829 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:27:49,829 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:27:49,830 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:27:49,831 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:27:49,881 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:27:49,901 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:27:49,926 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:27:49,926 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:27:49,927 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:27:49,927 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:27:49,927 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:27:49,927 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:27:49,927 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:27:49,927 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:27:49,936 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-05 21:27:49,945 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:27:49,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:49,951 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:49,952 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:49,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash -163389209, now seen corresponding path program 1 times [2021-06-05 21:27:49,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:49,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210449041] [2021-06-05 21:27:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:50,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:50,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210449041] [2021-06-05 21:27:50,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210449041] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:27:50,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:27:50,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:27:50,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233221991] [2021-06-05 21:27:50,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:27:50,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:50,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:27:50,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:27:50,170 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:50,213 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-06-05 21:27:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:27:50,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:27:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:50,224 INFO L225 Difference]: With dead ends: 26 [2021-06-05 21:27:50,224 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 21:27:50,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:27:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 21:27:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 21:27:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-06-05 21:27:50,254 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-06-05 21:27:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:50,255 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-06-05 21:27:50,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-06-05 21:27:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:27:50,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:50,257 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:50,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:27:50,257 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:50,262 INFO L82 PathProgramCache]: Analyzing trace with hash 580194151, now seen corresponding path program 2 times [2021-06-05 21:27:50,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:50,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839438959] [2021-06-05 21:27:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:50,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:50,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839438959] [2021-06-05 21:27:50,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839438959] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:27:50,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:27:50,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:27:50,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787994282] [2021-06-05 21:27:50,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:27:50,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:50,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:27:50,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:27:50,347 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:50,380 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 21:27:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:27:50,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:27:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:50,383 INFO L225 Difference]: With dead ends: 28 [2021-06-05 21:27:50,383 INFO L226 Difference]: Without dead ends: 23 [2021-06-05 21:27:50,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:27:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-06-05 21:27:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-06-05 21:27:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 21:27:50,392 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 21:27:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:50,393 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 21:27:50,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 21:27:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:27:50,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:50,394 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:50,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 21:27:50,395 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:50,396 INFO L82 PathProgramCache]: Analyzing trace with hash -824603045, now seen corresponding path program 1 times [2021-06-05 21:27:50,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:50,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768968221] [2021-06-05 21:27:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:50,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:50,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768968221] [2021-06-05 21:27:50,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768968221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:50,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836996419] [2021-06-05 21:27:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:27:50,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:50,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:27:50,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:50,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:50,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:27:50,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 21:27:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:50,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836996419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:50,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:50,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:27:50,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611412315] [2021-06-05 21:27:50,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:27:50,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:27:50,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:27:50,820 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:50,885 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-06-05 21:27:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:27:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:27:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:50,886 INFO L225 Difference]: With dead ends: 30 [2021-06-05 21:27:50,886 INFO L226 Difference]: Without dead ends: 22 [2021-06-05 21:27:50,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:27:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-06-05 21:27:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-06-05 21:27:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 21:27:50,889 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 21:27:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:50,890 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 21:27:50,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 21:27:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:27:50,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:50,890 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:51,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 21:27:51,113 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash -81019685, now seen corresponding path program 2 times [2021-06-05 21:27:51,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:51,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901126908] [2021-06-05 21:27:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:51,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:51,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901126908] [2021-06-05 21:27:51,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901126908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:51,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608167473] [2021-06-05 21:27:51,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:51,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:51,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:51,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:27:51,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:51,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:27:51,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:51,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:51,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 21:27:51,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:27:51,334 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-06-05 21:27:51,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:27:51,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 21:27:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:51,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608167473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:51,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:51,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:27:51,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591581177] [2021-06-05 21:27:51,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:27:51,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:51,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:27:51,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:27:51,373 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:51,434 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-06-05 21:27:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:27:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:27:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:51,435 INFO L225 Difference]: With dead ends: 35 [2021-06-05 21:27:51,435 INFO L226 Difference]: Without dead ends: 30 [2021-06-05 21:27:51,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:27:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-05 21:27:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-06-05 21:27:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 21:27:51,439 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 21:27:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:51,439 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 21:27:51,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 21:27:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:27:51,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:51,440 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:51,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:51,657 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:51,658 INFO L82 PathProgramCache]: Analyzing trace with hash 770124447, now seen corresponding path program 3 times [2021-06-05 21:27:51,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:51,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538055743] [2021-06-05 21:27:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:51,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:51,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538055743] [2021-06-05 21:27:51,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538055743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:51,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195609058] [2021-06-05 21:27:51,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:51,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:27:51,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:51,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:27:51,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:27:51,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:51,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:51,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 21:27:51,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:27:51,907 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-06-05 21:27:51,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:27:51,909 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 21:27:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:51,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195609058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:51,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:51,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:27:51,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128935077] [2021-06-05 21:27:51,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:27:51,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:27:51,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:27:51,958 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:52,107 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-06-05 21:27:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:27:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:27:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:52,108 INFO L225 Difference]: With dead ends: 51 [2021-06-05 21:27:52,108 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 21:27:52,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:27:52,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 21:27:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-06-05 21:27:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-05 21:27:52,112 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-06-05 21:27:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:52,113 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-05 21:27:52,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-05 21:27:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:27:52,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:52,114 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:52,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:52,329 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:52,329 INFO L82 PathProgramCache]: Analyzing trace with hash 108860664, now seen corresponding path program 1 times [2021-06-05 21:27:52,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:52,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992780008] [2021-06-05 21:27:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:52,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:52,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992780008] [2021-06-05 21:27:52,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992780008] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:27:52,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:27:52,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:27:52,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207801733] [2021-06-05 21:27:52,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:27:52,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:52,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:27:52,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:27:52,351 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:52,367 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-06-05 21:27:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:27:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:27:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:52,368 INFO L225 Difference]: With dead ends: 29 [2021-06-05 21:27:52,368 INFO L226 Difference]: Without dead ends: 29 [2021-06-05 21:27:52,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:27:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-05 21:27:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-06-05 21:27:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-06-05 21:27:52,372 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-06-05 21:27:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:52,372 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-06-05 21:27:52,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-06-05 21:27:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:27:52,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:52,373 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:52,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 21:27:52,373 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:52,374 INFO L82 PathProgramCache]: Analyzing trace with hash 152604519, now seen corresponding path program 4 times [2021-06-05 21:27:52,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:52,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454639400] [2021-06-05 21:27:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:52,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:52,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454639400] [2021-06-05 21:27:52,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454639400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:52,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334661159] [2021-06-05 21:27:52,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:52,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:52,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:52,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:27:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:52,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:52,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 21:27:52,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:52,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:52,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:27:52,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 21:27:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:52,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334661159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:52,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:52,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:27:52,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722797785] [2021-06-05 21:27:52,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:27:52,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:27:52,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:27:52,660 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:52,733 INFO L93 Difference]: Finished difference Result 39 states and 72 transitions. [2021-06-05 21:27:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:27:52,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:27:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:52,734 INFO L225 Difference]: With dead ends: 39 [2021-06-05 21:27:52,734 INFO L226 Difference]: Without dead ends: 34 [2021-06-05 21:27:52,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:27:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-06-05 21:27:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-06-05 21:27:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-06-05 21:27:52,737 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-06-05 21:27:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:52,737 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-06-05 21:27:52,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,738 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-06-05 21:27:52,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:27:52,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:52,738 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:52,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:52,953 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:52,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1747332011, now seen corresponding path program 5 times [2021-06-05 21:27:52,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:52,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973933077] [2021-06-05 21:27:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:53,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:53,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973933077] [2021-06-05 21:27:53,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973933077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:53,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87888712] [2021-06-05 21:27:53,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:53,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:53,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:53,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:27:53,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:53,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:53,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 21:27:53,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:53,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:53,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:27:53,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 21:27:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:53,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87888712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:53,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:53,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:27:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651511911] [2021-06-05 21:27:53,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:27:53,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:53,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:27:53,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:27:53,195 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:53,270 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-06-05 21:27:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:27:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:27:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:53,271 INFO L225 Difference]: With dead ends: 50 [2021-06-05 21:27:53,271 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 21:27:53,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:27:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 21:27:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-06-05 21:27:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-06-05 21:27:53,278 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-06-05 21:27:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:53,278 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-06-05 21:27:53,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-06-05 21:27:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:27:53,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:53,279 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:53,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 21:27:53,480 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1086068228, now seen corresponding path program 1 times [2021-06-05 21:27:53,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:53,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103148216] [2021-06-05 21:27:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:53,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:53,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103148216] [2021-06-05 21:27:53,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103148216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:53,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266461376] [2021-06-05 21:27:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:53,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 21:27:53,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:53,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266461376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:53,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:53,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 21:27:53,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925339658] [2021-06-05 21:27:53,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:27:53,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:53,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:27:53,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:27:53,562 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:53,608 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2021-06-05 21:27:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:27:53,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:27:53,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:53,611 INFO L225 Difference]: With dead ends: 58 [2021-06-05 21:27:53,612 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 21:27:53,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:27:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 21:27:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-06-05 21:27:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 64 transitions. [2021-06-05 21:27:53,615 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 64 transitions. Word has length 12 [2021-06-05 21:27:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:53,615 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 64 transitions. [2021-06-05 21:27:53,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 64 transitions. [2021-06-05 21:27:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:27:53,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:53,616 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:53,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:53,817 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash -974791574, now seen corresponding path program 2 times [2021-06-05 21:27:53,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:53,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644542395] [2021-06-05 21:27:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:53,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:53,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644542395] [2021-06-05 21:27:53,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644542395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:53,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005673971] [2021-06-05 21:27:53,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:53,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:53,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:53,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 21:27:53,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:53,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005673971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:53,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:53,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 21:27:53,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583181038] [2021-06-05 21:27:53,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:27:53,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:53,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:27:53,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:27:53,932 INFO L87 Difference]: Start difference. First operand 33 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:53,977 INFO L93 Difference]: Finished difference Result 44 states and 85 transitions. [2021-06-05 21:27:53,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:27:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:27:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:53,978 INFO L225 Difference]: With dead ends: 44 [2021-06-05 21:27:53,978 INFO L226 Difference]: Without dead ends: 44 [2021-06-05 21:27:53,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:27:53,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-06-05 21:27:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-06-05 21:27:53,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 70 transitions. [2021-06-05 21:27:53,991 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 70 transitions. Word has length 12 [2021-06-05 21:27:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:53,991 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 70 transitions. [2021-06-05 21:27:53,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 70 transitions. [2021-06-05 21:27:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:27:53,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:53,992 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:54,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:54,193 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash 381267931, now seen corresponding path program 6 times [2021-06-05 21:27:54,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:54,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150577272] [2021-06-05 21:27:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:54,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:54,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150577272] [2021-06-05 21:27:54,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150577272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:54,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213099581] [2021-06-05 21:27:54,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:54,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:27:54,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:54,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:27:54,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:54,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213099581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:54,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:54,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:27:54,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519811514] [2021-06-05 21:27:54,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:27:54,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:27:54,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:27:54,321 INFO L87 Difference]: Start difference. First operand 35 states and 70 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:54,359 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2021-06-05 21:27:54,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:27:54,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:27:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:54,361 INFO L225 Difference]: With dead ends: 67 [2021-06-05 21:27:54,361 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 21:27:54,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:27:54,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 21:27:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2021-06-05 21:27:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2021-06-05 21:27:54,369 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 13 [2021-06-05 21:27:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:54,369 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2021-06-05 21:27:54,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2021-06-05 21:27:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:27:54,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:54,370 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:54,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 21:27:54,571 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:54,571 INFO L82 PathProgramCache]: Analyzing trace with hash 462398216, now seen corresponding path program 3 times [2021-06-05 21:27:54,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:54,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946577386] [2021-06-05 21:27:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:54,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:54,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946577386] [2021-06-05 21:27:54,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946577386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:54,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410859577] [2021-06-05 21:27:54,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:54,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:27:54,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:54,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:27:54,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:54,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410859577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:54,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:54,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:27:54,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946657709] [2021-06-05 21:27:54,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:27:54,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:54,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:27:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:27:54,664 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:54,732 INFO L93 Difference]: Finished difference Result 80 states and 140 transitions. [2021-06-05 21:27:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:27:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:27:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:54,733 INFO L225 Difference]: With dead ends: 80 [2021-06-05 21:27:54,733 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 21:27:54,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:27:54,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 21:27:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2021-06-05 21:27:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 85 transitions. [2021-06-05 21:27:54,736 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 85 transitions. Word has length 13 [2021-06-05 21:27:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:54,736 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 85 transitions. [2021-06-05 21:27:54,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 85 transitions. [2021-06-05 21:27:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:27:54,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:54,737 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:54,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:54,958 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1975995423, now seen corresponding path program 7 times [2021-06-05 21:27:54,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:54,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264567909] [2021-06-05 21:27:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:54,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:54,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264567909] [2021-06-05 21:27:54,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264567909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:54,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651431239] [2021-06-05 21:27:54,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:55,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:27:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:55,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651431239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:55,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:55,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:27:55,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487192172] [2021-06-05 21:27:55,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:27:55,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:55,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:27:55,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:27:55,058 INFO L87 Difference]: Start difference. First operand 40 states and 85 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:55,114 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-06-05 21:27:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:27:55,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:27:55,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:55,115 INFO L225 Difference]: With dead ends: 51 [2021-06-05 21:27:55,115 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 21:27:55,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:27:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 21:27:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-06-05 21:27:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 84 transitions. [2021-06-05 21:27:55,129 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 84 transitions. Word has length 13 [2021-06-05 21:27:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:55,130 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 84 transitions. [2021-06-05 21:27:55,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 84 transitions. [2021-06-05 21:27:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:27:55,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:55,130 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:55,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:55,331 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1314731640, now seen corresponding path program 4 times [2021-06-05 21:27:55,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:55,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237970676] [2021-06-05 21:27:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:55,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:55,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237970676] [2021-06-05 21:27:55,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237970676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:55,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724411318] [2021-06-05 21:27:55,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:55,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:55,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:55,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:27:55,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:55,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724411318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:55,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:55,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:27:55,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615809836] [2021-06-05 21:27:55,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:27:55,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:55,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:27:55,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:27:55,441 INFO L87 Difference]: Start difference. First operand 40 states and 84 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:55,498 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-06-05 21:27:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:27:55,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:27:55,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:55,499 INFO L225 Difference]: With dead ends: 68 [2021-06-05 21:27:55,499 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 21:27:55,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:27:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 21:27:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2021-06-05 21:27:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2021-06-05 21:27:55,506 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 13 [2021-06-05 21:27:55,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:55,506 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2021-06-05 21:27:55,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2021-06-05 21:27:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:27:55,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:55,507 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:55,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 21:27:55,729 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:55,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1703307557, now seen corresponding path program 8 times [2021-06-05 21:27:55,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:55,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296580663] [2021-06-05 21:27:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:55,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:55,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296580663] [2021-06-05 21:27:55,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296580663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:55,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754716941] [2021-06-05 21:27:55,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:55,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:55,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:55,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:27:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:55,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754716941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:55,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:55,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:27:55,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008014470] [2021-06-05 21:27:55,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:27:55,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:55,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:27:55,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:27:55,816 INFO L87 Difference]: Start difference. First operand 38 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:55,869 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-06-05 21:27:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:27:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:27:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:55,871 INFO L225 Difference]: With dead ends: 51 [2021-06-05 21:27:55,871 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 21:27:55,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:27:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 21:27:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-05 21:27:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-06-05 21:27:55,876 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-06-05 21:27:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:55,876 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-06-05 21:27:55,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-06-05 21:27:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:27:55,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:55,877 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:56,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 21:27:56,097 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -746128162, now seen corresponding path program 5 times [2021-06-05 21:27:56,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:56,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825386011] [2021-06-05 21:27:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:56,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:56,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825386011] [2021-06-05 21:27:56,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825386011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:56,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729675847] [2021-06-05 21:27:56,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:56,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:56,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:56,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:27:56,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:56,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729675847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:56,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:56,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:27:56,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432983371] [2021-06-05 21:27:56,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:27:56,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:56,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:27:56,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:27:56,213 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:56,267 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-06-05 21:27:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:27:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:27:56,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:56,268 INFO L225 Difference]: With dead ends: 61 [2021-06-05 21:27:56,268 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 21:27:56,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:27:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 21:27:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-06-05 21:27:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-06-05 21:27:56,271 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-06-05 21:27:56,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:56,271 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-06-05 21:27:56,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-06-05 21:27:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:27:56,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:56,272 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:56,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 21:27:56,485 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash 202417055, now seen corresponding path program 9 times [2021-06-05 21:27:56,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:56,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511302831] [2021-06-05 21:27:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:56,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:56,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511302831] [2021-06-05 21:27:56,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511302831] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:27:56,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:27:56,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 21:27:56,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264394263] [2021-06-05 21:27:56,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:27:56,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:56,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:27:56,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:27:56,520 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:56,536 INFO L93 Difference]: Finished difference Result 42 states and 79 transitions. [2021-06-05 21:27:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:27:56,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:27:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:56,537 INFO L225 Difference]: With dead ends: 42 [2021-06-05 21:27:56,537 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 21:27:56,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:27:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 21:27:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-05 21:27:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 71 transitions. [2021-06-05 21:27:56,539 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 71 transitions. Word has length 13 [2021-06-05 21:27:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:56,540 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 71 transitions. [2021-06-05 21:27:56,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 71 transitions. [2021-06-05 21:27:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:27:56,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:56,540 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:56,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 21:27:56,541 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:56,541 INFO L82 PathProgramCache]: Analyzing trace with hash -208272584, now seen corresponding path program 6 times [2021-06-05 21:27:56,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:56,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982211678] [2021-06-05 21:27:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:56,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:56,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982211678] [2021-06-05 21:27:56,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982211678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:56,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221285955] [2021-06-05 21:27:56,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:56,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:27:56,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:56,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:27:56,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:56,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221285955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:56,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:56,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:27:56,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385531551] [2021-06-05 21:27:56,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:27:56,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:56,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:27:56,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:27:56,640 INFO L87 Difference]: Start difference. First operand 36 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:56,688 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2021-06-05 21:27:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:27:56,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:27:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:56,689 INFO L225 Difference]: With dead ends: 61 [2021-06-05 21:27:56,689 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 21:27:56,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:27:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 21:27:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-06-05 21:27:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 83 transitions. [2021-06-05 21:27:56,692 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 83 transitions. Word has length 13 [2021-06-05 21:27:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:56,694 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 83 transitions. [2021-06-05 21:27:56,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 83 transitions. [2021-06-05 21:27:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:27:56,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:56,695 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:56,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:56,905 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1038970604, now seen corresponding path program 7 times [2021-06-05 21:27:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:56,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668890388] [2021-06-05 21:27:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:56,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:56,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668890388] [2021-06-05 21:27:56,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668890388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:56,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266741162] [2021-06-05 21:27:56,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:27:57,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:57,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:57,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:27:57,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:57,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:57,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:27:57,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:27:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:57,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266741162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:57,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:57,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:27:57,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323955761] [2021-06-05 21:27:57,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:57,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:57,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:57,247 INFO L87 Difference]: Start difference. First operand 41 states and 83 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:57,369 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2021-06-05 21:27:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:27:57,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:27:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:57,370 INFO L225 Difference]: With dead ends: 56 [2021-06-05 21:27:57,370 INFO L226 Difference]: Without dead ends: 46 [2021-06-05 21:27:57,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:57,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-06-05 21:27:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-06-05 21:27:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 87 transitions. [2021-06-05 21:27:57,373 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 87 transitions. Word has length 14 [2021-06-05 21:27:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:57,374 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 87 transitions. [2021-06-05 21:27:57,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 87 transitions. [2021-06-05 21:27:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:27:57,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:57,374 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:57,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 21:27:57,598 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:57,598 INFO L82 PathProgramCache]: Analyzing trace with hash -186637180, now seen corresponding path program 8 times [2021-06-05 21:27:57,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:57,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956170495] [2021-06-05 21:27:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:57,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956170495] [2021-06-05 21:27:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956170495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844630050] [2021-06-05 21:27:57,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:57,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:57,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:57,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:27:57,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:57,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:57,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:27:57,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:57,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:57,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:27:57,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:27:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:57,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844630050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:57,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:57,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:27:57,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125409881] [2021-06-05 21:27:57,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:57,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:57,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:57,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:57,900 INFO L87 Difference]: Start difference. First operand 43 states and 87 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:58,127 INFO L93 Difference]: Finished difference Result 70 states and 143 transitions. [2021-06-05 21:27:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:27:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:27:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:58,130 INFO L225 Difference]: With dead ends: 70 [2021-06-05 21:27:58,130 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 21:27:58,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:27:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 21:27:58,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-06-05 21:27:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-06-05 21:27:58,132 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-06-05 21:27:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:58,132 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-06-05 21:27:58,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-06-05 21:27:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:27:58,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:58,133 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:58,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:58,349 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:58,349 INFO L82 PathProgramCache]: Analyzing trace with hash 556946180, now seen corresponding path program 9 times [2021-06-05 21:27:58,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:58,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676627876] [2021-06-05 21:27:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:58,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:58,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676627876] [2021-06-05 21:27:58,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676627876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:58,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864072802] [2021-06-05 21:27:58,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:58,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:27:58,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:58,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:27:58,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:58,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:58,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 21:27:58,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:27:58,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:27:58,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:58,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:58,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:27:58,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:58,721 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:27:58,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:27:58,721 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 21:27:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:58,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864072802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:58,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:58,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:27:58,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048886197] [2021-06-05 21:27:58,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:58,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:58,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:58,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:58,766 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:58,961 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-06-05 21:27:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:27:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:27:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:58,962 INFO L225 Difference]: With dead ends: 88 [2021-06-05 21:27:58,962 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 21:27:58,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 21:27:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-06-05 21:27:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-06-05 21:27:58,965 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-06-05 21:27:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:58,965 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-06-05 21:27:58,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,966 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-06-05 21:27:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:27:58,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:58,966 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:59,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:59,185 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:59,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2047470314, now seen corresponding path program 10 times [2021-06-05 21:27:59,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:59,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344581705] [2021-06-05 21:27:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:59,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:59,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344581705] [2021-06-05 21:27:59,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344581705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:59,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751649589] [2021-06-05 21:27:59,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:59,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:27:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:59,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:59,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:27:59,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:59,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:59,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:27:59,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:27:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:59,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751649589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:59,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:59,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:27:59,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097326547] [2021-06-05 21:27:59,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:59,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:59,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:59,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:59,454 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:59,626 INFO L93 Difference]: Finished difference Result 76 states and 163 transitions. [2021-06-05 21:27:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:27:59,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:27:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:59,627 INFO L225 Difference]: With dead ends: 76 [2021-06-05 21:27:59,627 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 21:27:59,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:27:59,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 21:27:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-06-05 21:27:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2021-06-05 21:27:59,630 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 14 [2021-06-05 21:27:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:59,630 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2021-06-05 21:27:59,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2021-06-05 21:27:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:27:59,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:59,630 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:59,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 21:27:59,841 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:59,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1503913622, now seen corresponding path program 11 times [2021-06-05 21:27:59,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:59,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015135523] [2021-06-05 21:27:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:59,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:59,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015135523] [2021-06-05 21:27:59,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015135523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:59,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440862180] [2021-06-05 21:27:59,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:59,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:27:59,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:59,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:27:59,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:00,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:00,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 21:28:00,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:00,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:00,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:00,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:00,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:00,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:00,193 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:00,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:00,194 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 21:28:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440862180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:00,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:00,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:00,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132731977] [2021-06-05 21:28:00,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:00,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:00,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:00,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:00,234 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:00,450 INFO L93 Difference]: Finished difference Result 101 states and 211 transitions. [2021-06-05 21:28:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:00,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:00,451 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:28:00,451 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 21:28:00,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 21:28:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-06-05 21:28:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-06-05 21:28:00,454 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-06-05 21:28:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:00,454 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-06-05 21:28:00,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-06-05 21:28:00,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:00,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:00,455 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:00,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 21:28:00,667 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:00,668 INFO L82 PathProgramCache]: Analyzing trace with hash -652769490, now seen corresponding path program 12 times [2021-06-05 21:28:00,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:00,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518235875] [2021-06-05 21:28:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:00,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518235875] [2021-06-05 21:28:00,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518235875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:00,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224467949] [2021-06-05 21:28:00,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:00,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:28:00,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:00,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:28:00,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:00,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:00,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 21:28:00,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:00,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:00,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:00,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:00,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:00,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:01,010 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:01,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:01,012 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 21:28:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:01,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224467949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:01,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:01,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:01,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649747029] [2021-06-05 21:28:01,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:01,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:01,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:01,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:01,041 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:01,278 INFO L93 Difference]: Finished difference Result 80 states and 179 transitions. [2021-06-05 21:28:01,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:01,278 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:01,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:01,279 INFO L225 Difference]: With dead ends: 80 [2021-06-05 21:28:01,279 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 21:28:01,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:28:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 21:28:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-06-05 21:28:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-06-05 21:28:01,283 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-06-05 21:28:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:01,283 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-06-05 21:28:01,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-06-05 21:28:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:01,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:01,284 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:01,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 21:28:01,493 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:01,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:01,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1709641404, now seen corresponding path program 13 times [2021-06-05 21:28:01,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:01,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962219895] [2021-06-05 21:28:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:01,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:01,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962219895] [2021-06-05 21:28:01,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962219895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:01,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553594561] [2021-06-05 21:28:01,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:01,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:28:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:01,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:01,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:01,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:01,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:01,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:01,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:28:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:01,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553594561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:01,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:01,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:01,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358119916] [2021-06-05 21:28:01,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:01,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:01,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:01,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:01,783 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:01,963 INFO L93 Difference]: Finished difference Result 81 states and 183 transitions. [2021-06-05 21:28:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:01,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:01,972 INFO L225 Difference]: With dead ends: 81 [2021-06-05 21:28:01,972 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 21:28:01,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 180.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 21:28:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-06-05 21:28:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 21:28:01,976 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 21:28:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:01,976 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 21:28:01,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 21:28:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:01,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:01,976 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:02,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:02,180 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash -966058044, now seen corresponding path program 14 times [2021-06-05 21:28:02,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:02,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179203872] [2021-06-05 21:28:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:02,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:02,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179203872] [2021-06-05 21:28:02,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179203872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:02,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14418879] [2021-06-05 21:28:02,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:02,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:02,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:28:02,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:02,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:02,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 21:28:02,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:02,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:02,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:02,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:02,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:02,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:02,477 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:02,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:02,477 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 21:28:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:02,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14418879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:02,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:02,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:02,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271429760] [2021-06-05 21:28:02,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:02,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:02,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:02,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:02,502 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:02,798 INFO L93 Difference]: Finished difference Result 102 states and 228 transitions. [2021-06-05 21:28:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:02,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:02,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:02,799 INFO L225 Difference]: With dead ends: 102 [2021-06-05 21:28:02,799 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:28:02,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:28:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:28:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2021-06-05 21:28:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 21:28:02,802 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 21:28:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:02,802 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 21:28:02,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 21:28:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:02,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:02,803 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:03,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:03,026 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:03,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:03,026 INFO L82 PathProgramCache]: Analyzing trace with hash -114913912, now seen corresponding path program 15 times [2021-06-05 21:28:03,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:03,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252471504] [2021-06-05 21:28:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:03,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:03,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252471504] [2021-06-05 21:28:03,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252471504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254958917] [2021-06-05 21:28:03,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:03,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:28:03,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:28:03,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:03,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:03,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 21:28:03,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:03,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:03,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:03,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:03,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:03,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:03,325 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:03,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:03,326 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 21:28:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:03,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254958917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:03,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:03,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035994918] [2021-06-05 21:28:03,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:03,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:03,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:03,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:03,353 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:03,589 INFO L93 Difference]: Finished difference Result 84 states and 193 transitions. [2021-06-05 21:28:03,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:28:03,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:03,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:03,590 INFO L225 Difference]: With dead ends: 84 [2021-06-05 21:28:03,590 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 21:28:03,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:03,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 21:28:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-06-05 21:28:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 21:28:03,592 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 21:28:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:03,592 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 21:28:03,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 21:28:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:03,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:03,593 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:03,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 21:28:03,805 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:03,806 INFO L82 PathProgramCache]: Analyzing trace with hash 500750404, now seen corresponding path program 16 times [2021-06-05 21:28:03,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:03,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244077193] [2021-06-05 21:28:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:03,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:03,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244077193] [2021-06-05 21:28:03,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244077193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757008841] [2021-06-05 21:28:03,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:03,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:03,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:03,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:28:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:04,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:04,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 21:28:04,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:04,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:04,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:04,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:04,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:04,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:04,139 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:04,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:04,140 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 21:28:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:04,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757008841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:04,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:04,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:04,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089736418] [2021-06-05 21:28:04,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:04,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:04,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:04,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:04,172 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:04,416 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2021-06-05 21:28:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:04,417 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:04,417 INFO L225 Difference]: With dead ends: 96 [2021-06-05 21:28:04,417 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 21:28:04,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:04,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 21:28:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2021-06-05 21:28:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 21:28:04,420 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 21:28:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:04,420 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 21:28:04,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 21:28:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:04,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:04,420 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:04,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:04,637 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:04,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2078979626, now seen corresponding path program 17 times [2021-06-05 21:28:04,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:04,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604973839] [2021-06-05 21:28:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:04,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:04,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604973839] [2021-06-05 21:28:04,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604973839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:04,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821405771] [2021-06-05 21:28:04,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:04,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:04,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:04,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:28:04,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:04,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:04,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:04,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:04,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:04,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:04,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-06-05 21:28:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:04,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821405771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:04,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:04,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:04,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740936657] [2021-06-05 21:28:04,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:04,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:04,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:04,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:04,921 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:05,141 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2021-06-05 21:28:05,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:05,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:05,142 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:28:05,142 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 21:28:05,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 21:28:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-06-05 21:28:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 21:28:05,144 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 21:28:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:05,144 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 21:28:05,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 21:28:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:05,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:05,145 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:05,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 21:28:05,361 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:05,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1472404310, now seen corresponding path program 18 times [2021-06-05 21:28:05,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:05,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030886870] [2021-06-05 21:28:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:05,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:05,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030886870] [2021-06-05 21:28:05,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030886870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:05,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156992121] [2021-06-05 21:28:05,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:05,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:05,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:05,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:28:05,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:05,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:05,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 21:28:05,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:05,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:05,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:05,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:05,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:05,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:05,667 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:05,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:05,668 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 21:28:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:05,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156992121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:05,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:05,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:05,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885323455] [2021-06-05 21:28:05,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:05,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:05,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:05,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:05,693 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:05,936 INFO L93 Difference]: Finished difference Result 112 states and 263 transitions. [2021-06-05 21:28:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:28:05,936 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:05,940 INFO L225 Difference]: With dead ends: 112 [2021-06-05 21:28:05,940 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 21:28:05,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:05,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 21:28:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-06-05 21:28:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 21:28:05,943 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 21:28:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:05,943 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 21:28:05,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 21:28:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:05,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:05,944 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:06,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 21:28:06,157 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:06,157 INFO L82 PathProgramCache]: Analyzing trace with hash -621260178, now seen corresponding path program 19 times [2021-06-05 21:28:06,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:06,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866542708] [2021-06-05 21:28:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:06,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:06,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866542708] [2021-06-05 21:28:06,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866542708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:06,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305417173] [2021-06-05 21:28:06,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:06,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:28:06,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:06,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:06,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 21:28:06,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:06,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:06,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:06,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:06,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:06,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:06,462 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:06,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:06,463 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 21:28:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:06,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305417173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:06,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:06,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:06,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109636193] [2021-06-05 21:28:06,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:06,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:06,489 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:06,671 INFO L93 Difference]: Finished difference Result 97 states and 233 transitions. [2021-06-05 21:28:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:06,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:06,672 INFO L225 Difference]: With dead ends: 97 [2021-06-05 21:28:06,673 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:28:06,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:28:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:28:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2021-06-05 21:28:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 21:28:06,675 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 21:28:06,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:06,675 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 21:28:06,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,675 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 21:28:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:06,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:06,676 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:06,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 21:28:06,876 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash -5595862, now seen corresponding path program 20 times [2021-06-05 21:28:06,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:06,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656698800] [2021-06-05 21:28:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:06,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:06,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656698800] [2021-06-05 21:28:06,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656698800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:06,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279016416] [2021-06-05 21:28:06,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:06,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:06,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:06,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:28:06,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:07,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:07,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 21:28:07,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:07,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:07,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:07,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:07,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:07,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:07,152 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:07,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:07,153 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 21:28:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:07,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279016416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:07,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:07,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:07,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654317678] [2021-06-05 21:28:07,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:07,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:07,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:07,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:07,183 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:07,459 INFO L93 Difference]: Finished difference Result 107 states and 254 transitions. [2021-06-05 21:28:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:07,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:07,460 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:28:07,460 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 21:28:07,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 295.9ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:28:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 21:28:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-06-05 21:28:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 21:28:07,462 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 21:28:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:07,463 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 21:28:07,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 21:28:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:07,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:07,463 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:07,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:07,683 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:07,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1900128750, now seen corresponding path program 21 times [2021-06-05 21:28:07,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:07,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457904835] [2021-06-05 21:28:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:07,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:07,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457904835] [2021-06-05 21:28:07,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457904835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:07,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658794925] [2021-06-05 21:28:07,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:07,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:28:07,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:07,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:28:07,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:07,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:07,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 21:28:07,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:07,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:07,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:07,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:07,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:07,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:08,008 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:08,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:08,010 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 21:28:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658794925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:08,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:28:08,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816856803] [2021-06-05 21:28:08,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:08,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:08,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:08,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:08,037 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:08,330 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2021-06-05 21:28:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:08,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:08,331 INFO L225 Difference]: With dead ends: 112 [2021-06-05 21:28:08,331 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 21:28:08,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:28:08,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 21:28:08,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-06-05 21:28:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.5652173913043477) internal successors, (177), 69 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2021-06-05 21:28:08,333 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 14 [2021-06-05 21:28:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:08,333 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2021-06-05 21:28:08,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2021-06-05 21:28:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:08,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:08,334 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:08,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 21:28:08,541 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:08,541 INFO L82 PathProgramCache]: Analyzing trace with hash -336763768, now seen corresponding path program 22 times [2021-06-05 21:28:08,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:08,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029058280] [2021-06-05 21:28:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:08,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029058280] [2021-06-05 21:28:08,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029058280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367507635] [2021-06-05 21:28:08,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:08,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:08,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:08,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:08,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:08,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:08,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:08,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:08,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:08,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:08,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367507635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:08,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:08,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917146783] [2021-06-05 21:28:08,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:08,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:08,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:08,851 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:09,007 INFO L93 Difference]: Finished difference Result 95 states and 224 transitions. [2021-06-05 21:28:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:09,007 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:09,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:09,008 INFO L225 Difference]: With dead ends: 95 [2021-06-05 21:28:09,008 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 21:28:09,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 21:28:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-06-05 21:28:09,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5416666666666665) internal successors, (183), 72 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-06-05 21:28:09,010 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 15 [2021-06-05 21:28:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:09,011 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-06-05 21:28:09,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,011 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-06-05 21:28:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:09,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:09,011 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:09,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:09,212 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:09,212 INFO L82 PathProgramCache]: Analyzing trace with hash 515569656, now seen corresponding path program 23 times [2021-06-05 21:28:09,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:09,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404570190] [2021-06-05 21:28:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:09,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:09,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404570190] [2021-06-05 21:28:09,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404570190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:09,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106288295] [2021-06-05 21:28:09,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:09,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:28:09,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:09,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:09,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:09,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:09,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:09,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:09,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:09,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:09,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:09,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106288295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:09,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:09,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:09,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370333090] [2021-06-05 21:28:09,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:09,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:09,520 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:09,819 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-06-05 21:28:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:09,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:09,820 INFO L225 Difference]: With dead ends: 90 [2021-06-05 21:28:09,820 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 21:28:09,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:28:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 21:28:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-06-05 21:28:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-05 21:28:09,822 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-06-05 21:28:09,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:09,822 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-05 21:28:09,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-05 21:28:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:09,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:09,823 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:10,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:10,023 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:10,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1259153016, now seen corresponding path program 24 times [2021-06-05 21:28:10,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:10,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535178262] [2021-06-05 21:28:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:10,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:10,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535178262] [2021-06-05 21:28:10,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535178262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:10,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538805742] [2021-06-05 21:28:10,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:10,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:10,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:10,143 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:10,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:10,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:10,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:10,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:10,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:10,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:10,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:10,463 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:10,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:10,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:10,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538805742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:10,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:10,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:10,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450737778] [2021-06-05 21:28:10,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:10,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:10,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:10,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:10,495 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:10,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:10,767 INFO L93 Difference]: Finished difference Result 112 states and 256 transitions. [2021-06-05 21:28:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:28:10,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:10,768 INFO L225 Difference]: With dead ends: 112 [2021-06-05 21:28:10,768 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 21:28:10,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 21:28:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-06-05 21:28:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-05 21:28:10,771 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-06-05 21:28:10,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:10,771 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-05 21:28:10,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-05 21:28:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:10,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:10,771 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:10,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 21:28:10,981 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash 49437346, now seen corresponding path program 25 times [2021-06-05 21:28:10,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:10,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275105802] [2021-06-05 21:28:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:11,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:11,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275105802] [2021-06-05 21:28:11,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275105802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:11,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777502011] [2021-06-05 21:28:11,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:11,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:11,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:11,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:11,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:11,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:11,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:11,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:11,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:11,413 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:11,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:11,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:11,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777502011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:11,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:11,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 21:28:11,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131171864] [2021-06-05 21:28:11,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:11,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:11,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:11,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:11,444 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:11,759 INFO L93 Difference]: Finished difference Result 128 states and 283 transitions. [2021-06-05 21:28:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:11,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:11,760 INFO L225 Difference]: With dead ends: 128 [2021-06-05 21:28:11,760 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 21:28:11,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 21:28:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2021-06-05 21:28:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.539473684210526) internal successors, (193), 76 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2021-06-05 21:28:11,763 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 15 [2021-06-05 21:28:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:11,763 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2021-06-05 21:28:11,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2021-06-05 21:28:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:11,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:11,764 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:11,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 21:28:11,964 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash -611826437, now seen corresponding path program 26 times [2021-06-05 21:28:11,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:11,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663789368] [2021-06-05 21:28:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:11,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:11,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663789368] [2021-06-05 21:28:11,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663789368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:11,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368892355] [2021-06-05 21:28:11,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:12,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:12,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:12,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:28:12,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:12,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368892355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:12,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:12,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:28:12,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595591611] [2021-06-05 21:28:12,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:12,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:12,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:12,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:12,048 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:12,083 INFO L93 Difference]: Finished difference Result 163 states and 339 transitions. [2021-06-05 21:28:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:28:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:12,084 INFO L225 Difference]: With dead ends: 163 [2021-06-05 21:28:12,084 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 21:28:12,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 21:28:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2021-06-05 21:28:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 212 transitions. [2021-06-05 21:28:12,092 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 212 transitions. Word has length 15 [2021-06-05 21:28:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:12,092 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 212 transitions. [2021-06-05 21:28:12,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 212 transitions. [2021-06-05 21:28:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:12,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:12,092 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:12,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 21:28:12,313 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:12,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1007434568, now seen corresponding path program 27 times [2021-06-05 21:28:12,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:12,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705899025] [2021-06-05 21:28:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:12,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:12,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705899025] [2021-06-05 21:28:12,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705899025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:12,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131646145] [2021-06-05 21:28:12,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:12,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:28:12,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:12,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:12,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:12,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:12,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:12,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:12,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:12,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:12,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:12,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131646145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:12,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:12,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:12,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174160753] [2021-06-05 21:28:12,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:12,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:12,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:12,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:12,655 INFO L87 Difference]: Start difference. First operand 82 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:12,875 INFO L93 Difference]: Finished difference Result 95 states and 233 transitions. [2021-06-05 21:28:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:12,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:12,875 INFO L225 Difference]: With dead ends: 95 [2021-06-05 21:28:12,875 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 21:28:12,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 21:28:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-06-05 21:28:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-05 21:28:12,878 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-05 21:28:12,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:12,878 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-05 21:28:12,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:12,878 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-05 21:28:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:12,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:12,879 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:13,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:13,093 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:13,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:13,093 INFO L82 PathProgramCache]: Analyzing trace with hash -263851208, now seen corresponding path program 28 times [2021-06-05 21:28:13,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:13,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294573805] [2021-06-05 21:28:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:13,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:13,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294573805] [2021-06-05 21:28:13,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294573805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:13,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721572759] [2021-06-05 21:28:13,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:13,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:13,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:13,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:13,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:13,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:13,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:13,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:13,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:13,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:13,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:13,535 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:13,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:13,536 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:13,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721572759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:13,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:13,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:13,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649247807] [2021-06-05 21:28:13,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:13,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:13,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:13,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:13,569 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:13,863 INFO L93 Difference]: Finished difference Result 118 states and 273 transitions. [2021-06-05 21:28:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:13,864 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:13,864 INFO L225 Difference]: With dead ends: 118 [2021-06-05 21:28:13,864 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 21:28:13,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 21:28:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-06-05 21:28:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-05 21:28:13,867 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-05 21:28:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:13,868 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-05 21:28:13,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-05 21:28:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:13,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:13,868 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:14,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 21:28:14,085 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:14,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:14,085 INFO L82 PathProgramCache]: Analyzing trace with hash 587292924, now seen corresponding path program 29 times [2021-06-05 21:28:14,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:14,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571148821] [2021-06-05 21:28:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:14,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:14,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571148821] [2021-06-05 21:28:14,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571148821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:14,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407406820] [2021-06-05 21:28:14,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:14,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:14,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:14,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:14,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:14,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:14,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:14,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:14,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:14,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:14,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:14,487 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:14,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:14,488 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:14,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407406820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:14,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:14,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:14,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634505329] [2021-06-05 21:28:14,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:14,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:14,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:14,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:14,518 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:14,890 INFO L93 Difference]: Finished difference Result 140 states and 313 transitions. [2021-06-05 21:28:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:14,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:14,893 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:28:14,893 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 21:28:14,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:28:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 21:28:14,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2021-06-05 21:28:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-05 21:28:14,896 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-05 21:28:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:14,896 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-05 21:28:14,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-05 21:28:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:14,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:14,897 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:15,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 21:28:15,117 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1202957240, now seen corresponding path program 30 times [2021-06-05 21:28:15,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:15,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861157411] [2021-06-05 21:28:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:15,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:15,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861157411] [2021-06-05 21:28:15,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861157411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:15,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231762069] [2021-06-05 21:28:15,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:15,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:28:15,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:15,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:15,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:15,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:15,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:15,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:15,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:15,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:15,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:15,605 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:15,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:15,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:15,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231762069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:15,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:15,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:15,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44187905] [2021-06-05 21:28:15,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:15,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:15,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:15,637 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:16,104 INFO L93 Difference]: Finished difference Result 157 states and 342 transitions. [2021-06-05 21:28:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:28:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:16,105 INFO L225 Difference]: With dead ends: 157 [2021-06-05 21:28:16,105 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:28:16,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:28:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:28:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2021-06-05 21:28:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5903614457831323) internal successors, (215), 83 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 215 transitions. [2021-06-05 21:28:16,108 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 215 transitions. Word has length 15 [2021-06-05 21:28:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:16,108 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 215 transitions. [2021-06-05 21:28:16,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 215 transitions. [2021-06-05 21:28:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:16,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:16,109 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:16,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 21:28:16,331 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:16,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2134830661, now seen corresponding path program 31 times [2021-06-05 21:28:16,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:16,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368166237] [2021-06-05 21:28:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:16,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:16,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368166237] [2021-06-05 21:28:16,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368166237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:16,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252954500] [2021-06-05 21:28:16,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:16,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:28:16,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:16,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252954500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:16,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:16,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:28:16,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778823823] [2021-06-05 21:28:16,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:16,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:16,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:16,432 INFO L87 Difference]: Start difference. First operand 84 states and 215 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:16,512 INFO L93 Difference]: Finished difference Result 200 states and 410 transitions. [2021-06-05 21:28:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:16,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:16,513 INFO L225 Difference]: With dead ends: 200 [2021-06-05 21:28:16,513 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:28:16,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:16,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:28:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 93. [2021-06-05 21:28:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6739130434782608) internal successors, (246), 92 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 246 transitions. [2021-06-05 21:28:16,517 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 246 transitions. Word has length 15 [2021-06-05 21:28:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:16,518 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 246 transitions. [2021-06-05 21:28:16,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 246 transitions. [2021-06-05 21:28:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:16,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:16,519 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:16,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:16,733 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1513780834, now seen corresponding path program 32 times [2021-06-05 21:28:16,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:16,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656667572] [2021-06-05 21:28:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:16,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:16,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656667572] [2021-06-05 21:28:16,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656667572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:16,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611484614] [2021-06-05 21:28:16,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:16,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:16,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:16,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:16,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:17,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:17,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:17,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:17,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:17,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:17,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:17,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611484614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:17,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:17,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:17,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385866245] [2021-06-05 21:28:17,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:17,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:17,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:17,059 INFO L87 Difference]: Start difference. First operand 93 states and 246 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:17,297 INFO L93 Difference]: Finished difference Result 107 states and 271 transitions. [2021-06-05 21:28:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:17,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:17,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:17,298 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:28:17,298 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 21:28:17,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 21:28:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-06-05 21:28:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 21:28:17,301 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 21:28:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:17,301 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 21:28:17,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 21:28:17,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:17,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:17,301 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:17,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:17,513 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash -770197474, now seen corresponding path program 33 times [2021-06-05 21:28:17,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:17,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764319415] [2021-06-05 21:28:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:17,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:17,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764319415] [2021-06-05 21:28:17,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764319415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:17,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611485832] [2021-06-05 21:28:17,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:17,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:17,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:17,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:17,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:17,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:17,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:17,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:17,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:17,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:17,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:17,956 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:17,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:17,957 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:17,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611485832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:17,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:17,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:17,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599279584] [2021-06-05 21:28:17,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:17,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:17,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:17,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:17,990 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:18,327 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2021-06-05 21:28:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:18,328 INFO L225 Difference]: With dead ends: 135 [2021-06-05 21:28:18,328 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 21:28:18,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 21:28:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2021-06-05 21:28:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 21:28:18,331 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 21:28:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:18,331 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 21:28:18,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 21:28:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:18,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:18,332 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:18,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:18,539 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:18,539 INFO L82 PathProgramCache]: Analyzing trace with hash 80946658, now seen corresponding path program 34 times [2021-06-05 21:28:18,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:18,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195650941] [2021-06-05 21:28:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:18,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:18,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195650941] [2021-06-05 21:28:18,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195650941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:18,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909793696] [2021-06-05 21:28:18,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:18,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:18,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:18,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:18,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:18,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:18,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:18,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:18,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:18,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:18,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:18,968 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:18,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:18,969 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:18,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909793696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:18,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:18,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:18,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840254315] [2021-06-05 21:28:18,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:18,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:18,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:18,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:18,999 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:19,369 INFO L93 Difference]: Finished difference Result 158 states and 363 transitions. [2021-06-05 21:28:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:19,370 INFO L225 Difference]: With dead ends: 158 [2021-06-05 21:28:19,370 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 21:28:19,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:28:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 21:28:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2021-06-05 21:28:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 21:28:19,373 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 21:28:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:19,373 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 21:28:19,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 21:28:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:19,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:19,374 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:19,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 21:28:19,589 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash 696610974, now seen corresponding path program 35 times [2021-06-05 21:28:19,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:19,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499064891] [2021-06-05 21:28:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:19,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:19,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499064891] [2021-06-05 21:28:19,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499064891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:19,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790681942] [2021-06-05 21:28:19,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:19,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:28:19,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:19,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:19,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:19,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:19,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:19,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:19,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:19,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:20,019 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:20,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:20,020 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:20,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790681942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:20,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:20,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:20,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629638398] [2021-06-05 21:28:20,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:20,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:20,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:20,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:20,051 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:20,504 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2021-06-05 21:28:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:28:20,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:20,505 INFO L225 Difference]: With dead ends: 169 [2021-06-05 21:28:20,505 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 21:28:20,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:28:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 21:28:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2021-06-05 21:28:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 21:28:20,508 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 21:28:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:20,508 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 21:28:20,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 21:28:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:20,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:20,509 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:20,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-05 21:28:20,724 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:20,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:20,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1692631710, now seen corresponding path program 36 times [2021-06-05 21:28:20,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:20,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571921154] [2021-06-05 21:28:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:20,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:20,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571921154] [2021-06-05 21:28:20,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571921154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:20,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82993943] [2021-06-05 21:28:20,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:20,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:20,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:20,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:20,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:20,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:21,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:21,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:21,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:21,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:21,133 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:21,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:21,134 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:21,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82993943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:21,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:21,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:21,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625926723] [2021-06-05 21:28:21,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:21,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:21,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:21,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:21,165 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:21,589 INFO L93 Difference]: Finished difference Result 140 states and 323 transitions. [2021-06-05 21:28:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:21,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:21,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:21,590 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:28:21,590 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 21:28:21,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:28:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 21:28:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-06-05 21:28:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.6382978723404253) internal successors, (248), 94 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 248 transitions. [2021-06-05 21:28:21,593 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 248 transitions. Word has length 15 [2021-06-05 21:28:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:21,593 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 248 transitions. [2021-06-05 21:28:21,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 248 transitions. [2021-06-05 21:28:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:21,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:21,593 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:21,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 21:28:21,801 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2103321349, now seen corresponding path program 37 times [2021-06-05 21:28:21,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:21,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595890669] [2021-06-05 21:28:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:21,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:21,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595890669] [2021-06-05 21:28:21,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595890669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:21,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906886502] [2021-06-05 21:28:21,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:21,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:28:21,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:21,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906886502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:21,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:21,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:28:21,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309682149] [2021-06-05 21:28:21,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:21,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:21,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:21,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:21,879 INFO L87 Difference]: Start difference. First operand 95 states and 248 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:21,971 INFO L93 Difference]: Finished difference Result 170 states and 379 transitions. [2021-06-05 21:28:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:28:21,972 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:21,972 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:28:21,972 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 21:28:21,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 21:28:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 102. [2021-06-05 21:28:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-06-05 21:28:21,976 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-06-05 21:28:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:21,976 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-06-05 21:28:21,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-06-05 21:28:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:21,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:21,976 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:22,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-06-05 21:28:22,199 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:22,199 INFO L82 PathProgramCache]: Analyzing trace with hash -30645896, now seen corresponding path program 38 times [2021-06-05 21:28:22,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:22,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100586551] [2021-06-05 21:28:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:22,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:22,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100586551] [2021-06-05 21:28:22,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100586551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:22,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133891080] [2021-06-05 21:28:22,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:22,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:22,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:22,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:22,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:22,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:22,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:22,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:22,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:22,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:22,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:22,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133891080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:22,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:22,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:22,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558317605] [2021-06-05 21:28:22,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:22,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:22,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:22,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:22,522 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:22,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:22,699 INFO L93 Difference]: Finished difference Result 120 states and 308 transitions. [2021-06-05 21:28:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:22,700 INFO L225 Difference]: With dead ends: 120 [2021-06-05 21:28:22,700 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 21:28:22,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:22,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 21:28:22,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-06-05 21:28:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-06-05 21:28:22,703 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-06-05 21:28:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:22,703 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-06-05 21:28:22,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:22,703 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-06-05 21:28:22,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:22,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:22,703 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:22,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable647 [2021-06-05 21:28:22,917 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash 712937464, now seen corresponding path program 39 times [2021-06-05 21:28:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:22,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139705318] [2021-06-05 21:28:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:23,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:23,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139705318] [2021-06-05 21:28:23,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139705318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:23,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975232034] [2021-06-05 21:28:23,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:23,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:23,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:23,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:23,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:23,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:23,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:23,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:23,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:23,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:23,318 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:23,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:23,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:23,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975232034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:23,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:23,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:23,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956125733] [2021-06-05 21:28:23,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:23,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:23,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:23,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:23,351 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:23,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:23,642 INFO L93 Difference]: Finished difference Result 154 states and 382 transitions. [2021-06-05 21:28:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:23,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:23,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:23,644 INFO L225 Difference]: With dead ends: 154 [2021-06-05 21:28:23,644 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 21:28:23,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 21:28:23,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-06-05 21:28:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-06-05 21:28:23,646 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-06-05 21:28:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:23,647 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-06-05 21:28:23,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-06-05 21:28:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:23,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:23,647 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:23,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:23,870 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:23,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:23,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1564081596, now seen corresponding path program 40 times [2021-06-05 21:28:23,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:23,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667689545] [2021-06-05 21:28:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:23,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:23,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667689545] [2021-06-05 21:28:23,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667689545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:23,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780174003] [2021-06-05 21:28:23,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:23,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:23,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:23,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:23,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:24,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:24,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:24,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:24,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:24,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:24,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:24,285 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:24,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:24,286 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:24,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780174003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:24,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:24,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:24,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574916062] [2021-06-05 21:28:24,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:24,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:24,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:24,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:24,317 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:24,758 INFO L93 Difference]: Finished difference Result 176 states and 417 transitions. [2021-06-05 21:28:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:28:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:24,759 INFO L225 Difference]: With dead ends: 176 [2021-06-05 21:28:24,759 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:28:24,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 398.3ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:28:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:28:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 103. [2021-06-05 21:28:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-06-05 21:28:24,761 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-06-05 21:28:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:24,762 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-06-05 21:28:24,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-06-05 21:28:24,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:24,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:24,762 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:24,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:24,984 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:24,985 INFO L82 PathProgramCache]: Analyzing trace with hash 902817813, now seen corresponding path program 41 times [2021-06-05 21:28:24,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:24,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423381538] [2021-06-05 21:28:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:25,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:25,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423381538] [2021-06-05 21:28:25,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423381538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:25,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435693127] [2021-06-05 21:28:25,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:25,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:28:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:25,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435693127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:25,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:25,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:28:25,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087307002] [2021-06-05 21:28:25,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:25,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:25,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:25,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:25,065 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:25,101 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2021-06-05 21:28:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:28:25,101 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:25,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:25,102 INFO L225 Difference]: With dead ends: 196 [2021-06-05 21:28:25,102 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 21:28:25,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 21:28:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2021-06-05 21:28:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.7666666666666666) internal successors, (332), 120 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 332 transitions. [2021-06-05 21:28:25,105 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 332 transitions. Word has length 15 [2021-06-05 21:28:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:25,105 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 332 transitions. [2021-06-05 21:28:25,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 332 transitions. [2021-06-05 21:28:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:25,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:25,106 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:25,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-06-05 21:28:25,321 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2115221384, now seen corresponding path program 42 times [2021-06-05 21:28:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990762170] [2021-06-05 21:28:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:25,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:25,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990762170] [2021-06-05 21:28:25,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990762170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:25,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797463333] [2021-06-05 21:28:25,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:25,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:25,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:25,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:25,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:25,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:25,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:25,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:25,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:25,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:25,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:25,716 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:25,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:25,717 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:25,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797463333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:25,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:25,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:25,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436929341] [2021-06-05 21:28:25,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:25,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:25,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:25,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:25,742 INFO L87 Difference]: Start difference. First operand 121 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:26,231 INFO L93 Difference]: Finished difference Result 209 states and 492 transitions. [2021-06-05 21:28:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:28:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:26,232 INFO L225 Difference]: With dead ends: 209 [2021-06-05 21:28:26,232 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:28:26,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:28:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:28:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 120. [2021-06-05 21:28:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.764705882352941) internal successors, (329), 119 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 329 transitions. [2021-06-05 21:28:26,235 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 329 transitions. Word has length 15 [2021-06-05 21:28:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:26,235 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 329 transitions. [2021-06-05 21:28:26,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:26,235 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 329 transitions. [2021-06-05 21:28:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:26,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:26,236 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:26,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 21:28:26,453 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041989, now seen corresponding path program 43 times [2021-06-05 21:28:26,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:26,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707890176] [2021-06-05 21:28:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:26,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:26,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707890176] [2021-06-05 21:28:26,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707890176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:26,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639090110] [2021-06-05 21:28:26,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:26,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:28:26,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:26,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639090110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:26,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:26,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:28:26,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712264474] [2021-06-05 21:28:26,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:26,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:26,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:26,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:26,550 INFO L87 Difference]: Start difference. First operand 120 states and 329 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:26,613 INFO L93 Difference]: Finished difference Result 219 states and 478 transitions. [2021-06-05 21:28:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:26,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:26,614 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:28:26,614 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:28:26,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:28:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 114. [2021-06-05 21:28:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-05 21:28:26,617 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-05 21:28:26,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:26,617 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-05 21:28:26,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-05 21:28:26,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:26,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:26,618 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:26,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:26,841 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:26,841 INFO L82 PathProgramCache]: Analyzing trace with hash -209496772, now seen corresponding path program 44 times [2021-06-05 21:28:26,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:26,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624705106] [2021-06-05 21:28:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:26,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:26,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624705106] [2021-06-05 21:28:26,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624705106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:26,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943327720] [2021-06-05 21:28:26,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:26,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:26,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:26,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:27,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:27,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:27,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:27,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:27,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:27,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:27,266 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:27,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:27,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:27,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943327720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:27,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:27,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:27,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857662879] [2021-06-05 21:28:27,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:27,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:27,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:27,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:27,298 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:27,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:27,750 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2021-06-05 21:28:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:27,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:27,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:27,751 INFO L225 Difference]: With dead ends: 172 [2021-06-05 21:28:27,751 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 21:28:27,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 515.7ms TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:28:27,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 21:28:27,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2021-06-05 21:28:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-05 21:28:27,754 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-05 21:28:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:27,754 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-05 21:28:27,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-05 21:28:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:27,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:27,754 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:27,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:27,976 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:27,977 INFO L82 PathProgramCache]: Analyzing trace with hash -620186411, now seen corresponding path program 45 times [2021-06-05 21:28:27,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:27,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525092934] [2021-06-05 21:28:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:28,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:28,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525092934] [2021-06-05 21:28:28,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525092934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:28,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605427156] [2021-06-05 21:28:28,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:28,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:28,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:28,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:28:28,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:28,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605427156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:28,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:28,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:28:28,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909842672] [2021-06-05 21:28:28,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:28,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:28,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:28,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:28,083 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:28,165 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2021-06-05 21:28:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:28:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:28,166 INFO L225 Difference]: With dead ends: 175 [2021-06-05 21:28:28,166 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 21:28:28,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 21:28:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-06-05 21:28:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-05 21:28:28,168 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-05 21:28:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:28,168 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-05 21:28:28,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-05 21:28:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:28,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:28,169 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:28,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable819 [2021-06-05 21:28:28,369 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1261575944, now seen corresponding path program 46 times [2021-06-05 21:28:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:28,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652716092] [2021-06-05 21:28:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:28,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:28,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652716092] [2021-06-05 21:28:28,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652716092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:28,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38732490] [2021-06-05 21:28:28,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:28,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:28,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:28,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:28:28,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:28,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:28,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:28,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:28,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:28,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:28,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:28,793 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:28,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:28,794 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 21:28:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:28,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38732490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:28,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:28,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:28,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918018493] [2021-06-05 21:28:28,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:28,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:28,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:28,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:28,826 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:29,241 INFO L93 Difference]: Finished difference Result 162 states and 391 transitions. [2021-06-05 21:28:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:29,242 INFO L225 Difference]: With dead ends: 162 [2021-06-05 21:28:29,242 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 21:28:29,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 537.7ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:28:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 21:28:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-06-05 21:28:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.7217391304347824) internal successors, (313), 115 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 313 transitions. [2021-06-05 21:28:29,245 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 313 transitions. Word has length 15 [2021-06-05 21:28:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:29,245 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 313 transitions. [2021-06-05 21:28:29,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 313 transitions. [2021-06-05 21:28:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:29,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:29,246 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:29,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-05 21:28:29,468 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:29,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1126532677, now seen corresponding path program 47 times [2021-06-05 21:28:29,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:29,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63860018] [2021-06-05 21:28:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:29,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:29,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63860018] [2021-06-05 21:28:29,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63860018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:29,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775510665] [2021-06-05 21:28:29,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:29,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:29,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:28:29,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:29,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775510665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:29,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:29,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:28:29,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239684861] [2021-06-05 21:28:29,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:29,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:29,580 INFO L87 Difference]: Start difference. First operand 116 states and 313 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:29,695 INFO L93 Difference]: Finished difference Result 188 states and 448 transitions. [2021-06-05 21:28:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:29,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:29,696 INFO L225 Difference]: With dead ends: 188 [2021-06-05 21:28:29,696 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 21:28:29,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 21:28:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2021-06-05 21:28:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.7355371900826446) internal successors, (331), 121 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 331 transitions. [2021-06-05 21:28:29,700 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 331 transitions. Word has length 15 [2021-06-05 21:28:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:29,700 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 331 transitions. [2021-06-05 21:28:29,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 331 transitions. [2021-06-05 21:28:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:29,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:29,701 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:29,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:29,924 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash -43188332, now seen corresponding path program 48 times [2021-06-05 21:28:29,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:29,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17623739] [2021-06-05 21:28:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:29,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:29,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17623739] [2021-06-05 21:28:29,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17623739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:29,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162394875] [2021-06-05 21:28:29,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:30,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:28:30,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:30,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:28:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:30,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:30,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:30,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:30,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:30,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:30,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:30,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162394875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:30,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:30,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:30,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653206966] [2021-06-05 21:28:30,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:30,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:30,250 INFO L87 Difference]: Start difference. First operand 122 states and 331 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:30,499 INFO L93 Difference]: Finished difference Result 161 states and 428 transitions. [2021-06-05 21:28:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:30,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:30,500 INFO L225 Difference]: With dead ends: 161 [2021-06-05 21:28:30,500 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:28:30,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:28:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:28:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-06-05 21:28:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-06-05 21:28:30,503 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-06-05 21:28:30,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:30,503 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-06-05 21:28:30,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-06-05 21:28:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:30,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:30,504 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:30,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:30,717 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash 343012782, now seen corresponding path program 49 times [2021-06-05 21:28:30,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:30,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576045915] [2021-06-05 21:28:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:30,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:30,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576045915] [2021-06-05 21:28:30,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576045915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:30,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496933441] [2021-06-05 21:28:30,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:28:30,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:30,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:30,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:31,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:31,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:31,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:31,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:31,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496933441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:31,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:31,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:31,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048091860] [2021-06-05 21:28:31,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:31,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:31,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:31,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:31,035 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:31,296 INFO L93 Difference]: Finished difference Result 174 states and 444 transitions. [2021-06-05 21:28:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:31,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:31,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:31,297 INFO L225 Difference]: With dead ends: 174 [2021-06-05 21:28:31,297 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 21:28:31,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:31,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 21:28:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-06-05 21:28:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-06-05 21:28:31,299 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-06-05 21:28:31,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:31,299 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-06-05 21:28:31,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-06-05 21:28:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:31,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:31,300 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:31,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:31,500 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash -318251001, now seen corresponding path program 50 times [2021-06-05 21:28:31,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:31,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727752121] [2021-06-05 21:28:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:31,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:31,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727752121] [2021-06-05 21:28:31,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727752121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:31,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646150389] [2021-06-05 21:28:31,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:31,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:31,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:31,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:31,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:31,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646150389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:31,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:31,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:28:31,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971321842] [2021-06-05 21:28:31,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:31,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:31,586 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:31,627 INFO L93 Difference]: Finished difference Result 261 states and 586 transitions. [2021-06-05 21:28:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:31,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:31,629 INFO L225 Difference]: With dead ends: 261 [2021-06-05 21:28:31,629 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 21:28:31,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 21:28:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 136. [2021-06-05 21:28:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-05 21:28:31,631 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-05 21:28:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:31,631 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-05 21:28:31,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-05 21:28:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:31,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:31,632 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:31,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable906 [2021-06-05 21:28:31,854 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:31,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:31,854 INFO L82 PathProgramCache]: Analyzing trace with hash -713859132, now seen corresponding path program 51 times [2021-06-05 21:28:31,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:31,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875062784] [2021-06-05 21:28:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:31,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:31,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875062784] [2021-06-05 21:28:31,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875062784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:31,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740857086] [2021-06-05 21:28:31,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:31,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:31,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:31,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:28:31,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:32,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:32,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:32,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:32,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:32,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:32,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:32,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740857086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:32,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:32,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:32,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39370217] [2021-06-05 21:28:32,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:32,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:32,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:32,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:32,146 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:32,342 INFO L93 Difference]: Finished difference Result 173 states and 438 transitions. [2021-06-05 21:28:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:32,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:32,343 INFO L225 Difference]: With dead ends: 173 [2021-06-05 21:28:32,344 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 21:28:32,344 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:28:32,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 21:28:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2021-06-05 21:28:32,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-05 21:28:32,346 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-05 21:28:32,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:32,347 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-05 21:28:32,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,347 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-05 21:28:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:32,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:32,347 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:32,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:32,561 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1841255225, now seen corresponding path program 52 times [2021-06-05 21:28:32,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:32,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191691655] [2021-06-05 21:28:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:32,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:32,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191691655] [2021-06-05 21:28:32,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191691655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:32,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510064271] [2021-06-05 21:28:32,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:28:32,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:32,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:32,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:32,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:32,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510064271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:32,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:32,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:32,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574632700] [2021-06-05 21:28:32,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:32,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:32,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:32,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:32,668 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:32,733 INFO L93 Difference]: Finished difference Result 272 states and 604 transitions. [2021-06-05 21:28:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:32,734 INFO L225 Difference]: With dead ends: 272 [2021-06-05 21:28:32,734 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 21:28:32,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:32,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 21:28:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 136. [2021-06-05 21:28:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-05 21:28:32,740 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-05 21:28:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:32,740 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-05 21:28:32,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-05 21:28:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:32,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:32,741 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:32,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-06-05 21:28:32,964 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:32,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1220205398, now seen corresponding path program 53 times [2021-06-05 21:28:32,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:32,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038582182] [2021-06-05 21:28:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:33,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:33,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038582182] [2021-06-05 21:28:33,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038582182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:33,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059253203] [2021-06-05 21:28:33,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:33,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:33,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:28:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:33,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:33,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:33,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:33,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:33,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:33,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:33,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059253203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:33,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:33,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:33,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232061029] [2021-06-05 21:28:33,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:33,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:33,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:33,310 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:33,503 INFO L93 Difference]: Finished difference Result 152 states and 404 transitions. [2021-06-05 21:28:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:33,504 INFO L225 Difference]: With dead ends: 152 [2021-06-05 21:28:33,504 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:28:33,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:28:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:28:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-06-05 21:28:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.774436090225564) internal successors, (369), 133 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 369 transitions. [2021-06-05 21:28:33,506 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 369 transitions. Word has length 16 [2021-06-05 21:28:33,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:33,507 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 369 transitions. [2021-06-05 21:28:33,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,507 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 369 transitions. [2021-06-05 21:28:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:33,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:33,507 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:33,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:33,717 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:33,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1947365805, now seen corresponding path program 54 times [2021-06-05 21:28:33,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:33,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659190286] [2021-06-05 21:28:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:33,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:33,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659190286] [2021-06-05 21:28:33,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659190286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:33,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423029502] [2021-06-05 21:28:33,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:33,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:28:33,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:33,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:33,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:33,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423029502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:33,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:33,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:33,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611216167] [2021-06-05 21:28:33,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:33,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:33,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:33,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:33,830 INFO L87 Difference]: Start difference. First operand 134 states and 369 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:33,884 INFO L93 Difference]: Finished difference Result 271 states and 600 transitions. [2021-06-05 21:28:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:33,885 INFO L225 Difference]: With dead ends: 271 [2021-06-05 21:28:33,885 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 21:28:33,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:33,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 21:28:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 137. [2021-06-05 21:28:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8088235294117645) internal successors, (382), 136 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 382 transitions. [2021-06-05 21:28:33,887 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 382 transitions. Word has length 16 [2021-06-05 21:28:33,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:33,887 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 382 transitions. [2021-06-05 21:28:33,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 382 transitions. [2021-06-05 21:28:33,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:33,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:33,888 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:34,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 21:28:34,089 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:34,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:34,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1809745913, now seen corresponding path program 55 times [2021-06-05 21:28:34,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:34,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974558018] [2021-06-05 21:28:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:34,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:34,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974558018] [2021-06-05 21:28:34,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974558018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:34,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192460139] [2021-06-05 21:28:34,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:34,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:34,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:34,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192460139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:34,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:34,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:34,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868478786] [2021-06-05 21:28:34,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:34,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:34,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:34,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:34,177 INFO L87 Difference]: Start difference. First operand 137 states and 382 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:34,266 INFO L93 Difference]: Finished difference Result 294 states and 636 transitions. [2021-06-05 21:28:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:34,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:34,267 INFO L225 Difference]: With dead ends: 294 [2021-06-05 21:28:34,267 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 21:28:34,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 21:28:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 138. [2021-06-05 21:28:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.795620437956204) internal successors, (383), 137 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 383 transitions. [2021-06-05 21:28:34,270 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 383 transitions. Word has length 16 [2021-06-05 21:28:34,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:34,270 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 383 transitions. [2021-06-05 21:28:34,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 383 transitions. [2021-06-05 21:28:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:34,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:34,270 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:34,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable955,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:34,493 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash 262929540, now seen corresponding path program 56 times [2021-06-05 21:28:34,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:34,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688517365] [2021-06-05 21:28:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:34,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:34,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688517365] [2021-06-05 21:28:34,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688517365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:34,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323765934] [2021-06-05 21:28:34,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:34,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:34,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:34,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:28:34,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:34,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:34,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:34,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:34,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:34,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:34,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:34,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323765934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:34,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:34,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:34,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057785654] [2021-06-05 21:28:34,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:34,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:34,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:34,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:34,846 INFO L87 Difference]: Start difference. First operand 138 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:35,034 INFO L93 Difference]: Finished difference Result 156 states and 422 transitions. [2021-06-05 21:28:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:35,035 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:28:35,035 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:28:35,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:28:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-06-05 21:28:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8043478260869565) internal successors, (387), 138 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 387 transitions. [2021-06-05 21:28:35,038 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 387 transitions. Word has length 16 [2021-06-05 21:28:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:35,038 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 387 transitions. [2021-06-05 21:28:35,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 387 transitions. [2021-06-05 21:28:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:35,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:35,039 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:35,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:35,253 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:35,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1196393249, now seen corresponding path program 57 times [2021-06-05 21:28:35,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:35,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48595753] [2021-06-05 21:28:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:35,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:35,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48595753] [2021-06-05 21:28:35,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48595753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:35,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422224592] [2021-06-05 21:28:35,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:35,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:35,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:35,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:28:35,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422224592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:35,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:35,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:28:35,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367668661] [2021-06-05 21:28:35,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:35,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:35,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:35,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:35,334 INFO L87 Difference]: Start difference. First operand 139 states and 387 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:35,364 INFO L93 Difference]: Finished difference Result 241 states and 571 transitions. [2021-06-05 21:28:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:28:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:35,365 INFO L225 Difference]: With dead ends: 241 [2021-06-05 21:28:35,365 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 21:28:35,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:35,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 21:28:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 156. [2021-06-05 21:28:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8516129032258064) internal successors, (442), 155 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 442 transitions. [2021-06-05 21:28:35,368 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 442 transitions. Word has length 16 [2021-06-05 21:28:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:35,368 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 442 transitions. [2021-06-05 21:28:35,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 442 transitions. [2021-06-05 21:28:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:35,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:35,369 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:35,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable979 [2021-06-05 21:28:35,570 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:35,570 INFO L82 PathProgramCache]: Analyzing trace with hash -864466553, now seen corresponding path program 58 times [2021-06-05 21:28:35,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:35,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492077534] [2021-06-05 21:28:35,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:35,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:35,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492077534] [2021-06-05 21:28:35,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492077534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:35,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54578901] [2021-06-05 21:28:35,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:35,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:35,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:35,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:35,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54578901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:35,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:35,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:35,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837369103] [2021-06-05 21:28:35,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:35,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:35,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:35,654 INFO L87 Difference]: Start difference. First operand 156 states and 442 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:35,720 INFO L93 Difference]: Finished difference Result 263 states and 603 transitions. [2021-06-05 21:28:35,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:35,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:35,721 INFO L225 Difference]: With dead ends: 263 [2021-06-05 21:28:35,721 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 21:28:35,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 21:28:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 145. [2021-06-05 21:28:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8125) internal successors, (405), 144 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 405 transitions. [2021-06-05 21:28:35,724 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 405 transitions. Word has length 16 [2021-06-05 21:28:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:35,724 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 405 transitions. [2021-06-05 21:28:35,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 405 transitions. [2021-06-05 21:28:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:35,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:35,725 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:35,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable980 [2021-06-05 21:28:35,948 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:35,949 INFO L82 PathProgramCache]: Analyzing trace with hash -326610975, now seen corresponding path program 59 times [2021-06-05 21:28:35,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:35,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257103171] [2021-06-05 21:28:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:35,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:35,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257103171] [2021-06-05 21:28:35,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257103171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:35,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53934690] [2021-06-05 21:28:35,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:36,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:28:36,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:36,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:36,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53934690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:36,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:36,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:36,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328574170] [2021-06-05 21:28:36,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:36,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:36,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:36,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:36,049 INFO L87 Difference]: Start difference. First operand 145 states and 405 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:36,134 INFO L93 Difference]: Finished difference Result 279 states and 612 transitions. [2021-06-05 21:28:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:28:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:36,135 INFO L225 Difference]: With dead ends: 279 [2021-06-05 21:28:36,135 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 21:28:36,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 21:28:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 139. [2021-06-05 21:28:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.7971014492753623) internal successors, (386), 138 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 386 transitions. [2021-06-05 21:28:36,138 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 386 transitions. Word has length 16 [2021-06-05 21:28:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:36,138 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 386 transitions. [2021-06-05 21:28:36,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 386 transitions. [2021-06-05 21:28:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:36,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:36,139 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:36,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable981,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:36,359 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:36,359 INFO L82 PathProgramCache]: Analyzing trace with hash -832957241, now seen corresponding path program 60 times [2021-06-05 21:28:36,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:36,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325606665] [2021-06-05 21:28:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:36,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:36,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325606665] [2021-06-05 21:28:36,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325606665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:36,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528661135] [2021-06-05 21:28:36,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:36,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:36,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:36,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:36,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528661135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:36,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:36,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:36,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194152765] [2021-06-05 21:28:36,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:36,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:36,457 INFO L87 Difference]: Start difference. First operand 139 states and 386 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:36,570 INFO L93 Difference]: Finished difference Result 234 states and 545 transitions. [2021-06-05 21:28:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:36,571 INFO L225 Difference]: With dead ends: 234 [2021-06-05 21:28:36,571 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:28:36,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:28:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 137. [2021-06-05 21:28:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.7941176470588234) internal successors, (380), 136 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 380 transitions. [2021-06-05 21:28:36,574 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 380 transitions. Word has length 16 [2021-06-05 21:28:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:36,574 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 380 transitions. [2021-06-05 21:28:36,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 380 transitions. [2021-06-05 21:28:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:36,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:36,575 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:36,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-05 21:28:36,797 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:36,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1004527638, now seen corresponding path program 61 times [2021-06-05 21:28:36,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:36,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809955193] [2021-06-05 21:28:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:36,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:36,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809955193] [2021-06-05 21:28:36,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809955193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:36,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204198767] [2021-06-05 21:28:36,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:28:36,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:37,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:37,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:37,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:37,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:37,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:37,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:37,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204198767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:37,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:37,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:37,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882405946] [2021-06-05 21:28:37,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:37,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:37,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:37,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:37,127 INFO L87 Difference]: Start difference. First operand 137 states and 380 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:37,319 INFO L93 Difference]: Finished difference Result 184 states and 502 transitions. [2021-06-05 21:28:37,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:37,319 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:37,320 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:28:37,320 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 21:28:37,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 21:28:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-06-05 21:28:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-06-05 21:28:37,322 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-06-05 21:28:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:37,322 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-06-05 21:28:37,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-06-05 21:28:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:37,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:37,323 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:37,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 21:28:37,523 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash 590199854, now seen corresponding path program 62 times [2021-06-05 21:28:37,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:37,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415082438] [2021-06-05 21:28:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:37,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:37,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415082438] [2021-06-05 21:28:37,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415082438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:37,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106454786] [2021-06-05 21:28:37,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:37,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:37,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:37,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:28:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:37,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:37,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:37,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:37,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:37,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:37,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:37,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106454786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:37,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:37,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:37,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766500907] [2021-06-05 21:28:37,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:37,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:37,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:37,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:37,844 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:38,164 INFO L93 Difference]: Finished difference Result 197 states and 515 transitions. [2021-06-05 21:28:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:28:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:38,165 INFO L225 Difference]: With dead ends: 197 [2021-06-05 21:28:38,165 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 21:28:38,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 21:28:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-06-05 21:28:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-06-05 21:28:38,167 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-06-05 21:28:38,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:38,168 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-06-05 21:28:38,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-06-05 21:28:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:38,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:38,168 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:38,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1018 [2021-06-05 21:28:38,369 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash -71063929, now seen corresponding path program 63 times [2021-06-05 21:28:38,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:38,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097679394] [2021-06-05 21:28:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:38,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:38,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097679394] [2021-06-05 21:28:38,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097679394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:38,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161697997] [2021-06-05 21:28:38,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:38,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:38,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:38,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:38,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:38,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161697997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:38,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:38,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:38,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14292178] [2021-06-05 21:28:38,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:38,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:38,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:38,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:38,450 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:38,492 INFO L93 Difference]: Finished difference Result 269 states and 624 transitions. [2021-06-05 21:28:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:38,493 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:38,493 INFO L225 Difference]: With dead ends: 269 [2021-06-05 21:28:38,493 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 21:28:38,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 21:28:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 158. [2021-06-05 21:28:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8980891719745223) internal successors, (455), 157 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 455 transitions. [2021-06-05 21:28:38,497 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 455 transitions. Word has length 16 [2021-06-05 21:28:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:38,497 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 455 transitions. [2021-06-05 21:28:38,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 455 transitions. [2021-06-05 21:28:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:38,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:38,498 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:38,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:38,713 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2131923731, now seen corresponding path program 64 times [2021-06-05 21:28:38,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:38,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790632832] [2021-06-05 21:28:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:38,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:38,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790632832] [2021-06-05 21:28:38,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790632832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:38,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227861520] [2021-06-05 21:28:38,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:38,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:38,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:38,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:38,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227861520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:38,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:38,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:38,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200693196] [2021-06-05 21:28:38,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:38,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:38,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:38,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:38,802 INFO L87 Difference]: Start difference. First operand 158 states and 455 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:38,856 INFO L93 Difference]: Finished difference Result 244 states and 614 transitions. [2021-06-05 21:28:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:28:38,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:38,858 INFO L225 Difference]: With dead ends: 244 [2021-06-05 21:28:38,858 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 21:28:38,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:38,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 21:28:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-06-05 21:28:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9195402298850577) internal successors, (508), 174 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 508 transitions. [2021-06-05 21:28:38,861 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 508 transitions. Word has length 16 [2021-06-05 21:28:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:38,862 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 508 transitions. [2021-06-05 21:28:38,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 508 transitions. [2021-06-05 21:28:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:38,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:38,862 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:39,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1051,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:39,085 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1594068153, now seen corresponding path program 65 times [2021-06-05 21:28:39,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:39,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331993310] [2021-06-05 21:28:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:39,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:39,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331993310] [2021-06-05 21:28:39,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331993310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:39,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382984206] [2021-06-05 21:28:39,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:39,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:39,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:39,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:39,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382984206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:39,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:39,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:39,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627869260] [2021-06-05 21:28:39,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:39,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:39,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:39,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:39,179 INFO L87 Difference]: Start difference. First operand 175 states and 508 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:39,256 INFO L93 Difference]: Finished difference Result 268 states and 649 transitions. [2021-06-05 21:28:39,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:39,256 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:39,257 INFO L225 Difference]: With dead ends: 268 [2021-06-05 21:28:39,257 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 21:28:39,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 21:28:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 172. [2021-06-05 21:28:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-06-05 21:28:39,261 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-06-05 21:28:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:39,261 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-06-05 21:28:39,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-06-05 21:28:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:39,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:39,262 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:39,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:39,484 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2100414419, now seen corresponding path program 66 times [2021-06-05 21:28:39,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:39,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29090870] [2021-06-05 21:28:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:39,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:39,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29090870] [2021-06-05 21:28:39,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29090870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:39,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845527009] [2021-06-05 21:28:39,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:39,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:28:39,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:39,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:39,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845527009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:39,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:39,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:39,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130943186] [2021-06-05 21:28:39,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:39,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:39,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:39,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:39,588 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:39,689 INFO L93 Difference]: Finished difference Result 237 states and 603 transitions. [2021-06-05 21:28:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:39,690 INFO L225 Difference]: With dead ends: 237 [2021-06-05 21:28:39,690 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 21:28:39,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 21:28:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2021-06-05 21:28:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-06-05 21:28:39,694 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-06-05 21:28:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:39,694 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-06-05 21:28:39,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-06-05 21:28:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:39,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:39,694 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:39,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:39,909 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:39,909 INFO L82 PathProgramCache]: Analyzing trace with hash -617279481, now seen corresponding path program 67 times [2021-06-05 21:28:39,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:39,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042156777] [2021-06-05 21:28:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:39,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:39,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042156777] [2021-06-05 21:28:39,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042156777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:39,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838100017] [2021-06-05 21:28:39,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:39,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:39,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:39,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838100017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:39,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:39,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:39,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069089614] [2021-06-05 21:28:39,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:39,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:39,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:39,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:39,996 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:40,096 INFO L93 Difference]: Finished difference Result 261 states and 681 transitions. [2021-06-05 21:28:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:40,097 INFO L225 Difference]: With dead ends: 261 [2021-06-05 21:28:40,097 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 21:28:40,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 21:28:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2021-06-05 21:28:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-06-05 21:28:40,099 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 16 [2021-06-05 21:28:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:40,100 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-06-05 21:28:40,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-06-05 21:28:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:40,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:40,100 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:40,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:40,301 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:40,301 INFO L82 PathProgramCache]: Analyzing trace with hash 467715592, now seen corresponding path program 68 times [2021-06-05 21:28:40,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:40,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582177703] [2021-06-05 21:28:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:40,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:40,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582177703] [2021-06-05 21:28:40,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582177703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:40,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079529947] [2021-06-05 21:28:40,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:40,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:40,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:40,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:40,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:40,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079529947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:40,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:40,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:40,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873990505] [2021-06-05 21:28:40,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:40,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:40,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:40,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:40,418 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:40,510 INFO L93 Difference]: Finished difference Result 282 states and 694 transitions. [2021-06-05 21:28:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:28:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:40,513 INFO L225 Difference]: With dead ends: 282 [2021-06-05 21:28:40,513 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 21:28:40,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 21:28:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 190. [2021-06-05 21:28:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-06-05 21:28:40,517 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-06-05 21:28:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:40,517 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-06-05 21:28:40,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-06-05 21:28:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:40,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:40,518 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:40,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1055 [2021-06-05 21:28:40,738 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:40,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1312212869, now seen corresponding path program 69 times [2021-06-05 21:28:40,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:40,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107108307] [2021-06-05 21:28:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:40,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:40,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107108307] [2021-06-05 21:28:40,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107108307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:40,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371482828] [2021-06-05 21:28:40,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:40,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:40,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:40,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371482828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:40,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:40,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:40,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803314157] [2021-06-05 21:28:40,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:40,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:40,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:40,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:40,852 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:40,985 INFO L93 Difference]: Finished difference Result 315 states and 767 transitions. [2021-06-05 21:28:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:40,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:40,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:40,987 INFO L225 Difference]: With dead ends: 315 [2021-06-05 21:28:40,987 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 21:28:40,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 21:28:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 196. [2021-06-05 21:28:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.933333333333333) internal successors, (572), 195 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 572 transitions. [2021-06-05 21:28:40,990 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 572 transitions. Word has length 17 [2021-06-05 21:28:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:40,990 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 572 transitions. [2021-06-05 21:28:40,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 572 transitions. [2021-06-05 21:28:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:40,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:40,990 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:41,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-06-05 21:28:41,191 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:41,191 INFO L82 PathProgramCache]: Analyzing trace with hash 853916706, now seen corresponding path program 70 times [2021-06-05 21:28:41,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:41,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089806993] [2021-06-05 21:28:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:41,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:41,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089806993] [2021-06-05 21:28:41,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089806993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:41,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339167209] [2021-06-05 21:28:41,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:41,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:41,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:41,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:41,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:41,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339167209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:41,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:41,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:41,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093908907] [2021-06-05 21:28:41,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:41,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:41,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:41,291 INFO L87 Difference]: Start difference. First operand 196 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:41,384 INFO L93 Difference]: Finished difference Result 233 states and 626 transitions. [2021-06-05 21:28:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:41,385 INFO L225 Difference]: With dead ends: 233 [2021-06-05 21:28:41,385 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 21:28:41,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 21:28:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 198. [2021-06-05 21:28:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9035532994923856) internal successors, (572), 197 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 572 transitions. [2021-06-05 21:28:41,388 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 572 transitions. Word has length 17 [2021-06-05 21:28:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:41,388 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 572 transitions. [2021-06-05 21:28:41,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 572 transitions. [2021-06-05 21:28:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:41,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:41,389 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:41,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-06-05 21:28:41,605 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:41,605 INFO L82 PathProgramCache]: Analyzing trace with hash 192652923, now seen corresponding path program 71 times [2021-06-05 21:28:41,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:41,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72642011] [2021-06-05 21:28:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:41,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:41,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72642011] [2021-06-05 21:28:41,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72642011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:41,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490922528] [2021-06-05 21:28:41,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:41,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:41,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:41,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:41,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:41,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490922528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:41,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:41,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:41,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371850036] [2021-06-05 21:28:41,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:41,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:41,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:41,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:41,713 INFO L87 Difference]: Start difference. First operand 198 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:41,759 INFO L93 Difference]: Finished difference Result 310 states and 743 transitions. [2021-06-05 21:28:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:41,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:41,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:41,761 INFO L225 Difference]: With dead ends: 310 [2021-06-05 21:28:41,761 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 21:28:41,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 21:28:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 188. [2021-06-05 21:28:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.855614973262032) internal successors, (534), 187 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 534 transitions. [2021-06-05 21:28:41,765 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 534 transitions. Word has length 17 [2021-06-05 21:28:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:41,765 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 534 transitions. [2021-06-05 21:28:41,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 534 transitions. [2021-06-05 21:28:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:41,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:41,765 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:41,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1058,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:41,973 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:41,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2007436600, now seen corresponding path program 72 times [2021-06-05 21:28:41,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:41,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930233466] [2021-06-05 21:28:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:42,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:42,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930233466] [2021-06-05 21:28:42,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930233466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:42,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993962099] [2021-06-05 21:28:42,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:42,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:28:42,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:42,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:42,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993962099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:42,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:42,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:42,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220315163] [2021-06-05 21:28:42,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:42,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:42,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:42,071 INFO L87 Difference]: Start difference. First operand 188 states and 534 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:42,144 INFO L93 Difference]: Finished difference Result 256 states and 671 transitions. [2021-06-05 21:28:42,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:42,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:42,147 INFO L225 Difference]: With dead ends: 256 [2021-06-05 21:28:42,147 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:28:42,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:28:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-06-05 21:28:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8469387755102042) internal successors, (558), 196 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 558 transitions. [2021-06-05 21:28:42,150 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 558 transitions. Word has length 17 [2021-06-05 21:28:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:42,150 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 558 transitions. [2021-06-05 21:28:42,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 558 transitions. [2021-06-05 21:28:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:42,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:42,151 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:42,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-06-05 21:28:42,360 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:42,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1330351301, now seen corresponding path program 73 times [2021-06-05 21:28:42,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:42,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645157621] [2021-06-05 21:28:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:42,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:42,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645157621] [2021-06-05 21:28:42,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645157621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:42,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775547362] [2021-06-05 21:28:42,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:42,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:42,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:42,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775547362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:42,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:42,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:42,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204129274] [2021-06-05 21:28:42,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:42,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:42,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:42,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:42,459 INFO L87 Difference]: Start difference. First operand 197 states and 558 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:42,524 INFO L93 Difference]: Finished difference Result 333 states and 786 transitions. [2021-06-05 21:28:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:28:42,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:42,525 INFO L225 Difference]: With dead ends: 333 [2021-06-05 21:28:42,525 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 21:28:42,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:28:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 21:28:42,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 199. [2021-06-05 21:28:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.8535353535353534) internal successors, (565), 198 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 565 transitions. [2021-06-05 21:28:42,530 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 565 transitions. Word has length 17 [2021-06-05 21:28:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:42,530 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 565 transitions. [2021-06-05 21:28:42,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 565 transitions. [2021-06-05 21:28:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:42,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:42,531 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:42,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1060,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:42,745 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash -888152350, now seen corresponding path program 74 times [2021-06-05 21:28:42,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:42,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584142510] [2021-06-05 21:28:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:42,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:42,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584142510] [2021-06-05 21:28:42,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584142510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:42,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647709146] [2021-06-05 21:28:42,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:42,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:42,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:42,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:42,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:42,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647709146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:42,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:42,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:42,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899686376] [2021-06-05 21:28:42,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:42,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:42,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:42,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:42,836 INFO L87 Difference]: Start difference. First operand 199 states and 565 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:42,908 INFO L93 Difference]: Finished difference Result 260 states and 680 transitions. [2021-06-05 21:28:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:42,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:42,909 INFO L225 Difference]: With dead ends: 260 [2021-06-05 21:28:42,909 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 21:28:42,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:28:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 21:28:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2021-06-05 21:28:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-06-05 21:28:42,913 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-06-05 21:28:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:42,913 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-06-05 21:28:42,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-06-05 21:28:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:42,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:42,914 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:43,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:43,129 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1298841989, now seen corresponding path program 75 times [2021-06-05 21:28:43,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:43,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718220856] [2021-06-05 21:28:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:43,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:43,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718220856] [2021-06-05 21:28:43,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718220856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:43,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936072751] [2021-06-05 21:28:43,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:43,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:28:43,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:43,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:43,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:43,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936072751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:43,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:43,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:43,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101668878] [2021-06-05 21:28:43,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:43,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:43,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:43,246 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:43,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:43,332 INFO L93 Difference]: Finished difference Result 348 states and 819 transitions. [2021-06-05 21:28:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:43,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:43,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:43,333 INFO L225 Difference]: With dead ends: 348 [2021-06-05 21:28:43,334 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 21:28:43,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 21:28:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 201. [2021-06-05 21:28:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-06-05 21:28:43,337 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-06-05 21:28:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:43,337 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-06-05 21:28:43,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-06-05 21:28:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:43,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:43,337 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:43,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:43,538 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:43,538 INFO L82 PathProgramCache]: Analyzing trace with hash 773833464, now seen corresponding path program 76 times [2021-06-05 21:28:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:43,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955438290] [2021-06-05 21:28:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:43,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:43,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955438290] [2021-06-05 21:28:43,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955438290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:43,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110226165] [2021-06-05 21:28:43,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:43,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:43,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:43,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:43,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:28:43,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110226165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:43,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:43,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:28:43,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576292019] [2021-06-05 21:28:43,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:43,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:43,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:43,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:43,635 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:43,678 INFO L93 Difference]: Finished difference Result 328 states and 825 transitions. [2021-06-05 21:28:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:28:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:43,680 INFO L225 Difference]: With dead ends: 328 [2021-06-05 21:28:43,680 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 21:28:43,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 21:28:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 216. [2021-06-05 21:28:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.902325581395349) internal successors, (624), 215 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 624 transitions. [2021-06-05 21:28:43,684 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 624 transitions. Word has length 17 [2021-06-05 21:28:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:43,684 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 624 transitions. [2021-06-05 21:28:43,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 624 transitions. [2021-06-05 21:28:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:43,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:43,685 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:43,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1063 [2021-06-05 21:28:43,893 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:43,893 INFO L82 PathProgramCache]: Analyzing trace with hash 854963749, now seen corresponding path program 77 times [2021-06-05 21:28:43,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:43,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543292995] [2021-06-05 21:28:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:43,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:43,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543292995] [2021-06-05 21:28:43,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543292995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:43,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471553966] [2021-06-05 21:28:43,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:43,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:43,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:43,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:43,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:28:43,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471553966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:43,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:43,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:28:43,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009352274] [2021-06-05 21:28:43,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:43,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:43,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:43,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:43,992 INFO L87 Difference]: Start difference. First operand 216 states and 624 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:44,062 INFO L93 Difference]: Finished difference Result 306 states and 770 transitions. [2021-06-05 21:28:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:28:44,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:44,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:44,063 INFO L225 Difference]: With dead ends: 306 [2021-06-05 21:28:44,063 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 21:28:44,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 21:28:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 226. [2021-06-05 21:28:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.92) internal successors, (657), 225 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 657 transitions. [2021-06-05 21:28:44,078 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 657 transitions. Word has length 17 [2021-06-05 21:28:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:44,078 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 657 transitions. [2021-06-05 21:28:44,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 657 transitions. [2021-06-05 21:28:44,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:44,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:44,079 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:44,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:44,293 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash -353562629, now seen corresponding path program 78 times [2021-06-05 21:28:44,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:44,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492992783] [2021-06-05 21:28:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:44,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492992783] [2021-06-05 21:28:44,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492992783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:44,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771462753] [2021-06-05 21:28:44,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:44,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:28:44,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:44,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:44,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771462753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:44,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:44,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:44,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801900147] [2021-06-05 21:28:44,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:44,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:44,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:44,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:44,377 INFO L87 Difference]: Start difference. First operand 226 states and 657 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:44,427 INFO L93 Difference]: Finished difference Result 312 states and 782 transitions. [2021-06-05 21:28:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:44,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:44,428 INFO L225 Difference]: With dead ends: 312 [2021-06-05 21:28:44,428 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 21:28:44,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 21:28:44,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 225. [2021-06-05 21:28:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.9151785714285716) internal successors, (653), 224 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 653 transitions. [2021-06-05 21:28:44,432 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 653 transitions. Word has length 17 [2021-06-05 21:28:44,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:44,432 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 653 transitions. [2021-06-05 21:28:44,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 653 transitions. [2021-06-05 21:28:44,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:44,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:44,432 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:44,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:44,633 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 594982588, now seen corresponding path program 79 times [2021-06-05 21:28:44,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:44,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884521122] [2021-06-05 21:28:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:44,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:44,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884521122] [2021-06-05 21:28:44,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884521122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:44,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572722693] [2021-06-05 21:28:44,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:44,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:44,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:44,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572722693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:44,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:44,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:44,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593688736] [2021-06-05 21:28:44,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:44,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:44,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:44,731 INFO L87 Difference]: Start difference. First operand 225 states and 653 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:44,810 INFO L93 Difference]: Finished difference Result 311 states and 814 transitions. [2021-06-05 21:28:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:44,811 INFO L225 Difference]: With dead ends: 311 [2021-06-05 21:28:44,811 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 21:28:44,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 21:28:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 227. [2021-06-05 21:28:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-06-05 21:28:44,815 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-06-05 21:28:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:44,815 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-06-05 21:28:44,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-06-05 21:28:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:44,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:44,815 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:45,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-06-05 21:28:45,016 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:45,016 INFO L82 PathProgramCache]: Analyzing trace with hash 184292949, now seen corresponding path program 80 times [2021-06-05 21:28:45,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:45,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884656891] [2021-06-05 21:28:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:45,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:45,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884656891] [2021-06-05 21:28:45,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884656891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:45,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357885028] [2021-06-05 21:28:45,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:45,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:45,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:45,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:45,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:45,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357885028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:45,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:45,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:45,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378359152] [2021-06-05 21:28:45,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:45,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:45,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:45,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:45,128 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:45,231 INFO L93 Difference]: Finished difference Result 338 states and 826 transitions. [2021-06-05 21:28:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:28:45,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:45,233 INFO L225 Difference]: With dead ends: 338 [2021-06-05 21:28:45,233 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 21:28:45,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 21:28:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 227. [2021-06-05 21:28:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-06-05 21:28:45,238 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-06-05 21:28:45,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:45,238 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-06-05 21:28:45,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-06-05 21:28:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:45,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:45,238 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:45,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-06-05 21:28:45,461 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:45,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:45,461 INFO L82 PathProgramCache]: Analyzing trace with hash -457096584, now seen corresponding path program 81 times [2021-06-05 21:28:45,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:45,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720962758] [2021-06-05 21:28:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:45,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:45,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720962758] [2021-06-05 21:28:45,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720962758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:45,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388844198] [2021-06-05 21:28:45,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:45,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:45,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:45,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:45,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:45,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388844198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:45,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:45,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:45,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449409526] [2021-06-05 21:28:45,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:45,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:45,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:45,564 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:45,650 INFO L93 Difference]: Finished difference Result 329 states and 850 transitions. [2021-06-05 21:28:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:45,651 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:45,652 INFO L225 Difference]: With dead ends: 329 [2021-06-05 21:28:45,652 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 21:28:45,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 21:28:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2021-06-05 21:28:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.878260869565217) internal successors, (662), 230 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 662 transitions. [2021-06-05 21:28:45,659 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 662 transitions. Word has length 17 [2021-06-05 21:28:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:45,659 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 662 transitions. [2021-06-05 21:28:45,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 662 transitions. [2021-06-05 21:28:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:45,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:45,660 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:45,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1068,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:45,873 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash -322053317, now seen corresponding path program 82 times [2021-06-05 21:28:45,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:45,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947580885] [2021-06-05 21:28:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:45,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:45,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947580885] [2021-06-05 21:28:45,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947580885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:45,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016512050] [2021-06-05 21:28:45,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:45,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:45,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:45,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:45,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:45,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016512050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:45,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:45,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:45,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239632929] [2021-06-05 21:28:45,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:45,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:45,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:45,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:45,971 INFO L87 Difference]: Start difference. First operand 231 states and 662 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:46,098 INFO L93 Difference]: Finished difference Result 375 states and 902 transitions. [2021-06-05 21:28:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:46,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:46,100 INFO L225 Difference]: With dead ends: 375 [2021-06-05 21:28:46,100 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 21:28:46,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:28:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 21:28:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 228. [2021-06-05 21:28:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.86784140969163) internal successors, (651), 227 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 651 transitions. [2021-06-05 21:28:46,104 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 651 transitions. Word has length 17 [2021-06-05 21:28:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:46,104 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 651 transitions. [2021-06-05 21:28:46,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 651 transitions. [2021-06-05 21:28:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:46,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:46,105 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:46,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-06-05 21:28:46,321 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:46,321 INFO L82 PathProgramCache]: Analyzing trace with hash -493623714, now seen corresponding path program 83 times [2021-06-05 21:28:46,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:46,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396233954] [2021-06-05 21:28:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:46,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:46,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396233954] [2021-06-05 21:28:46,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396233954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:46,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420621640] [2021-06-05 21:28:46,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:46,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:46,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:46,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:46,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420621640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:46,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:46,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:46,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375071890] [2021-06-05 21:28:46,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:46,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:46,401 INFO L87 Difference]: Start difference. First operand 228 states and 651 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:46,446 INFO L93 Difference]: Finished difference Result 391 states and 994 transitions. [2021-06-05 21:28:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:46,447 INFO L225 Difference]: With dead ends: 391 [2021-06-05 21:28:46,447 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 21:28:46,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 21:28:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 256. [2021-06-05 21:28:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.9686274509803923) internal successors, (757), 255 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 757 transitions. [2021-06-05 21:28:46,451 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 757 transitions. Word has length 17 [2021-06-05 21:28:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:46,451 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 757 transitions. [2021-06-05 21:28:46,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 757 transitions. [2021-06-05 21:28:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:46,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:46,452 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:46,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-06-05 21:28:46,652 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash -412493429, now seen corresponding path program 84 times [2021-06-05 21:28:46,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:46,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320710584] [2021-06-05 21:28:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:46,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:46,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320710584] [2021-06-05 21:28:46,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320710584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:46,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650510863] [2021-06-05 21:28:46,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:46,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:28:46,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:46,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:46,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650510863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:46,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:46,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:46,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200586955] [2021-06-05 21:28:46,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:46,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:46,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:46,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:46,731 INFO L87 Difference]: Start difference. First operand 256 states and 757 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:46,818 INFO L93 Difference]: Finished difference Result 374 states and 958 transitions. [2021-06-05 21:28:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:46,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:46,820 INFO L225 Difference]: With dead ends: 374 [2021-06-05 21:28:46,820 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 21:28:46,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:28:46,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 21:28:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 269. [2021-06-05 21:28:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.003731343283582) internal successors, (805), 268 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 805 transitions. [2021-06-05 21:28:46,824 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 805 transitions. Word has length 17 [2021-06-05 21:28:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:46,824 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 805 transitions. [2021-06-05 21:28:46,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 805 transitions. [2021-06-05 21:28:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:46,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:46,825 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:47,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:47,025 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1101103778, now seen corresponding path program 85 times [2021-06-05 21:28:47,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:47,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295256893] [2021-06-05 21:28:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:47,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:47,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295256893] [2021-06-05 21:28:47,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295256893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:47,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485894489] [2021-06-05 21:28:47,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:47,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:47,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485894489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:47,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:47,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:47,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546776022] [2021-06-05 21:28:47,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:47,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:47,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:47,112 INFO L87 Difference]: Start difference. First operand 269 states and 805 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:47,198 INFO L93 Difference]: Finished difference Result 394 states and 1025 transitions. [2021-06-05 21:28:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:47,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:47,199 INFO L225 Difference]: With dead ends: 394 [2021-06-05 21:28:47,200 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 21:28:47,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:28:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 21:28:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 269. [2021-06-05 21:28:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0) internal successors, (804), 268 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 804 transitions. [2021-06-05 21:28:47,205 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 804 transitions. Word has length 17 [2021-06-05 21:28:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:47,205 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 804 transitions. [2021-06-05 21:28:47,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 804 transitions. [2021-06-05 21:28:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:47,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:47,205 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:47,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-06-05 21:28:47,406 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash 439839995, now seen corresponding path program 86 times [2021-06-05 21:28:47,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:47,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437582693] [2021-06-05 21:28:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:47,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:47,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437582693] [2021-06-05 21:28:47,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437582693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:47,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32605849] [2021-06-05 21:28:47,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:47,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:47,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:47,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:47,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:47,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32605849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:47,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:47,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:47,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165932582] [2021-06-05 21:28:47,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:47,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:47,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:47,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:47,486 INFO L87 Difference]: Start difference. First operand 269 states and 804 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:47,531 INFO L93 Difference]: Finished difference Result 362 states and 940 transitions. [2021-06-05 21:28:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:47,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:47,532 INFO L225 Difference]: With dead ends: 362 [2021-06-05 21:28:47,532 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 21:28:47,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 21:28:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2021-06-05 21:28:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.963709677419355) internal successors, (735), 248 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 735 transitions. [2021-06-05 21:28:47,536 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 735 transitions. Word has length 17 [2021-06-05 21:28:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:47,536 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 735 transitions. [2021-06-05 21:28:47,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 735 transitions. [2021-06-05 21:28:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:47,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:47,537 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:47,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:47,737 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:47,737 INFO L82 PathProgramCache]: Analyzing trace with hash -672474590, now seen corresponding path program 87 times [2021-06-05 21:28:47,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:47,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987813050] [2021-06-05 21:28:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:47,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:47,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987813050] [2021-06-05 21:28:47,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987813050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:47,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7913149] [2021-06-05 21:28:47,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:47,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:47,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:47,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:47,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:47,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7913149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:47,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:47,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:47,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286866450] [2021-06-05 21:28:47,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:47,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:47,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:47,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:47,843 INFO L87 Difference]: Start difference. First operand 249 states and 735 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:47,953 INFO L93 Difference]: Finished difference Result 356 states and 958 transitions. [2021-06-05 21:28:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:47,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:47,954 INFO L225 Difference]: With dead ends: 356 [2021-06-05 21:28:47,955 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 21:28:47,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 21:28:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 263. [2021-06-05 21:28:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0) internal successors, (786), 262 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 786 transitions. [2021-06-05 21:28:47,959 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 786 transitions. Word has length 17 [2021-06-05 21:28:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:47,960 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 786 transitions. [2021-06-05 21:28:47,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 786 transitions. [2021-06-05 21:28:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:47,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:47,960 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:48,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:48,183 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:48,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1083164229, now seen corresponding path program 88 times [2021-06-05 21:28:48,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:48,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965690504] [2021-06-05 21:28:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:48,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:48,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965690504] [2021-06-05 21:28:48,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965690504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:48,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796628478] [2021-06-05 21:28:48,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:48,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:48,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:48,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:48,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:48,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796628478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:48,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:48,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:48,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189787352] [2021-06-05 21:28:48,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:48,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:48,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:48,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:48,283 INFO L87 Difference]: Start difference. First operand 263 states and 786 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:48,357 INFO L93 Difference]: Finished difference Result 358 states and 949 transitions. [2021-06-05 21:28:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:48,359 INFO L225 Difference]: With dead ends: 358 [2021-06-05 21:28:48,359 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 21:28:48,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 21:28:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 264. [2021-06-05 21:28:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-06-05 21:28:48,364 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 17 [2021-06-05 21:28:48,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:48,364 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-06-05 21:28:48,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-06-05 21:28:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:48,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:48,365 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:48,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:48,566 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:48,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1724553762, now seen corresponding path program 89 times [2021-06-05 21:28:48,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:48,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512426407] [2021-06-05 21:28:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:48,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:48,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512426407] [2021-06-05 21:28:48,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512426407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:48,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4839834] [2021-06-05 21:28:48,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:48,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:48,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:48,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:48,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4839834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:48,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:48,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:48,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318779480] [2021-06-05 21:28:48,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:48,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:48,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:48,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:48,656 INFO L87 Difference]: Start difference. First operand 264 states and 788 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:48,749 INFO L93 Difference]: Finished difference Result 377 states and 1000 transitions. [2021-06-05 21:28:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:48,751 INFO L225 Difference]: With dead ends: 377 [2021-06-05 21:28:48,751 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 21:28:48,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 21:28:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 264. [2021-06-05 21:28:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9923954372623576) internal successors, (787), 263 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 787 transitions. [2021-06-05 21:28:48,756 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 787 transitions. Word has length 17 [2021-06-05 21:28:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:48,756 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 787 transitions. [2021-06-05 21:28:48,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 787 transitions. [2021-06-05 21:28:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:48,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:48,757 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:48,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:48,973 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:48,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1589510495, now seen corresponding path program 90 times [2021-06-05 21:28:48,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:48,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457689247] [2021-06-05 21:28:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:49,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:49,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457689247] [2021-06-05 21:28:49,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457689247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:49,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049692176] [2021-06-05 21:28:49,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:49,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:49,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:49,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:49,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049692176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:49,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:49,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:49,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474109636] [2021-06-05 21:28:49,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:49,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:49,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:49,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:49,075 INFO L87 Difference]: Start difference. First operand 264 states and 787 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:49,193 INFO L93 Difference]: Finished difference Result 370 states and 949 transitions. [2021-06-05 21:28:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:49,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:49,194 INFO L225 Difference]: With dead ends: 370 [2021-06-05 21:28:49,194 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 21:28:49,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 21:28:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 258. [2021-06-05 21:28:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.992217898832685) internal successors, (769), 257 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-06-05 21:28:49,199 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 17 [2021-06-05 21:28:49,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:49,199 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-06-05 21:28:49,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-06-05 21:28:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:49,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:49,199 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:49,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1077,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:49,400 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:49,400 INFO L82 PathProgramCache]: Analyzing trace with hash 20730274, now seen corresponding path program 91 times [2021-06-05 21:28:49,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:49,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960826215] [2021-06-05 21:28:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:49,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:49,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960826215] [2021-06-05 21:28:49,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960826215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:49,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295003144] [2021-06-05 21:28:49,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:49,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:49,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295003144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:49,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:49,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:49,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810027653] [2021-06-05 21:28:49,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:49,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:49,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:49,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:49,536 INFO L87 Difference]: Start difference. First operand 258 states and 769 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:49,606 INFO L93 Difference]: Finished difference Result 319 states and 889 transitions. [2021-06-05 21:28:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:49,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:49,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:49,608 INFO L225 Difference]: With dead ends: 319 [2021-06-05 21:28:49,608 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 21:28:49,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:28:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 21:28:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 258. [2021-06-05 21:28:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9883268482490273) internal successors, (768), 257 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 768 transitions. [2021-06-05 21:28:49,613 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 768 transitions. Word has length 17 [2021-06-05 21:28:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:49,613 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 768 transitions. [2021-06-05 21:28:49,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 768 transitions. [2021-06-05 21:28:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:49,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:49,614 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:49,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-06-05 21:28:49,829 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:49,829 INFO L82 PathProgramCache]: Analyzing trace with hash -106375557, now seen corresponding path program 92 times [2021-06-05 21:28:49,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:49,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759584646] [2021-06-05 21:28:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:49,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:49,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759584646] [2021-06-05 21:28:49,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759584646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:49,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564316434] [2021-06-05 21:28:49,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:49,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:49,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:49,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:49,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:49,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564316434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:49,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:49,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:49,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136309972] [2021-06-05 21:28:49,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:49,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:49,940 INFO L87 Difference]: Start difference. First operand 258 states and 768 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:50,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:50,089 INFO L93 Difference]: Finished difference Result 377 states and 992 transitions. [2021-06-05 21:28:50,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:50,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:50,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:50,090 INFO L225 Difference]: With dead ends: 377 [2021-06-05 21:28:50,090 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 21:28:50,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:50,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 21:28:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 266. [2021-06-05 21:28:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.9849056603773585) internal successors, (791), 265 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 791 transitions. [2021-06-05 21:28:50,095 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 791 transitions. Word has length 17 [2021-06-05 21:28:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:50,095 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 791 transitions. [2021-06-05 21:28:50,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 791 transitions. [2021-06-05 21:28:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:50,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:50,095 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:50,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 21:28:50,317 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1130090568, now seen corresponding path program 93 times [2021-06-05 21:28:50,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:50,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948984586] [2021-06-05 21:28:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:50,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:50,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948984586] [2021-06-05 21:28:50,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948984586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:50,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651947219] [2021-06-05 21:28:50,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:50,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:28:50,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:50,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:50,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:50,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651947219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:50,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:50,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:50,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027289553] [2021-06-05 21:28:50,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:50,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:50,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:50,416 INFO L87 Difference]: Start difference. First operand 266 states and 791 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:50,463 INFO L93 Difference]: Finished difference Result 455 states and 1181 transitions. [2021-06-05 21:28:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:50,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:50,464 INFO L225 Difference]: With dead ends: 455 [2021-06-05 21:28:50,464 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 21:28:50,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 21:28:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 307. [2021-06-05 21:28:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0784313725490198) internal successors, (942), 306 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 942 transitions. [2021-06-05 21:28:50,468 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 942 transitions. Word has length 17 [2021-06-05 21:28:50,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:50,469 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 942 transitions. [2021-06-05 21:28:50,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 942 transitions. [2021-06-05 21:28:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:50,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:50,469 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:50,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-06-05 21:28:50,673 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1048960283, now seen corresponding path program 94 times [2021-06-05 21:28:50,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:50,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315570070] [2021-06-05 21:28:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:50,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:50,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315570070] [2021-06-05 21:28:50,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315570070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:50,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765646573] [2021-06-05 21:28:50,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:50,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:50,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:50,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:50,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:50,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765646573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:50,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:50,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:50,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028996579] [2021-06-05 21:28:50,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:50,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:50,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:50,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:50,790 INFO L87 Difference]: Start difference. First operand 307 states and 942 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:50,906 INFO L93 Difference]: Finished difference Result 448 states and 1182 transitions. [2021-06-05 21:28:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:50,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:50,907 INFO L225 Difference]: With dead ends: 448 [2021-06-05 21:28:50,907 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 21:28:50,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 21:28:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-06-05 21:28:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.109717868338558) internal successors, (992), 319 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 992 transitions. [2021-06-05 21:28:50,911 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 992 transitions. Word has length 17 [2021-06-05 21:28:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:50,911 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 992 transitions. [2021-06-05 21:28:50,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 992 transitions. [2021-06-05 21:28:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:50,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:50,912 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:51,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:51,112 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:51,113 INFO L82 PathProgramCache]: Analyzing trace with hash 464636924, now seen corresponding path program 95 times [2021-06-05 21:28:51,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:51,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52208628] [2021-06-05 21:28:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:51,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52208628] [2021-06-05 21:28:51,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52208628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894703070] [2021-06-05 21:28:51,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:51,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:51,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:51,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:51,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894703070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:51,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:51,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665472962] [2021-06-05 21:28:51,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:51,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:51,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:51,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:51,198 INFO L87 Difference]: Start difference. First operand 320 states and 992 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:51,290 INFO L93 Difference]: Finished difference Result 458 states and 1214 transitions. [2021-06-05 21:28:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:51,291 INFO L225 Difference]: With dead ends: 458 [2021-06-05 21:28:51,291 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 21:28:51,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 21:28:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 309. [2021-06-05 21:28:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0779220779220777) internal successors, (948), 308 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 948 transitions. [2021-06-05 21:28:51,295 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 948 transitions. Word has length 17 [2021-06-05 21:28:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:51,295 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 948 transitions. [2021-06-05 21:28:51,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 948 transitions. [2021-06-05 21:28:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:51,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:51,295 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:51,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1082,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:51,496 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash -196626859, now seen corresponding path program 96 times [2021-06-05 21:28:51,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:51,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187273221] [2021-06-05 21:28:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:51,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187273221] [2021-06-05 21:28:51,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187273221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934644067] [2021-06-05 21:28:51,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:51,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:28:51,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:51,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:51,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934644067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:51,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:51,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837619844] [2021-06-05 21:28:51,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:51,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:51,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:51,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:51,610 INFO L87 Difference]: Start difference. First operand 309 states and 948 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:51,664 INFO L93 Difference]: Finished difference Result 433 states and 1138 transitions. [2021-06-05 21:28:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:28:51,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:51,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:51,666 INFO L225 Difference]: With dead ends: 433 [2021-06-05 21:28:51,666 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 21:28:51,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:28:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 21:28:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 312. [2021-06-05 21:28:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0707395498392285) internal successors, (955), 311 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 955 transitions. [2021-06-05 21:28:51,671 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 955 transitions. Word has length 17 [2021-06-05 21:28:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:51,671 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 955 transitions. [2021-06-05 21:28:51,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 955 transitions. [2021-06-05 21:28:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:51,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:51,672 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:51,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-06-05 21:28:51,881 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1080301240, now seen corresponding path program 97 times [2021-06-05 21:28:51,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:51,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913872471] [2021-06-05 21:28:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:51,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913872471] [2021-06-05 21:28:51,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913872471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282805010] [2021-06-05 21:28:51,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:52,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282805010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:52,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:52,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:52,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42484051] [2021-06-05 21:28:52,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:52,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:52,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:52,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:52,009 INFO L87 Difference]: Start difference. First operand 312 states and 955 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:52,120 INFO L93 Difference]: Finished difference Result 472 states and 1273 transitions. [2021-06-05 21:28:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:52,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:52,122 INFO L225 Difference]: With dead ends: 472 [2021-06-05 21:28:52,122 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 21:28:52,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 21:28:52,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-06-05 21:28:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.071197411003236) internal successors, (949), 309 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 949 transitions. [2021-06-05 21:28:52,127 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 949 transitions. Word has length 17 [2021-06-05 21:28:52,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:52,128 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 949 transitions. [2021-06-05 21:28:52,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,128 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 949 transitions. [2021-06-05 21:28:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:52,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:52,128 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:52,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:52,337 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2037480635, now seen corresponding path program 98 times [2021-06-05 21:28:52,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:52,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114744620] [2021-06-05 21:28:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:52,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:52,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114744620] [2021-06-05 21:28:52,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114744620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:52,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608627111] [2021-06-05 21:28:52,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:52,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:52,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:52,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:52,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:52,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608627111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:52,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:52,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:52,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786209209] [2021-06-05 21:28:52,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:52,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:52,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:52,429 INFO L87 Difference]: Start difference. First operand 310 states and 949 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:52,491 INFO L93 Difference]: Finished difference Result 407 states and 1107 transitions. [2021-06-05 21:28:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:52,492 INFO L225 Difference]: With dead ends: 407 [2021-06-05 21:28:52,493 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 21:28:52,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:28:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 21:28:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 318. [2021-06-05 21:28:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0757097791798107) internal successors, (975), 317 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 975 transitions. [2021-06-05 21:28:52,496 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 975 transitions. Word has length 17 [2021-06-05 21:28:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:52,496 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 975 transitions. [2021-06-05 21:28:52,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,496 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 975 transitions. [2021-06-05 21:28:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:52,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:52,497 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:52,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:52,697 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1308941444, now seen corresponding path program 99 times [2021-06-05 21:28:52,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:52,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127861321] [2021-06-05 21:28:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:52,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:52,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127861321] [2021-06-05 21:28:52,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127861321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:52,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531556196] [2021-06-05 21:28:52,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:52,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:28:52,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:52,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:52,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531556196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:52,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:52,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:28:52,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482071604] [2021-06-05 21:28:52,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:52,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:52,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:52,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:52,777 INFO L87 Difference]: Start difference. First operand 318 states and 975 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:52,858 INFO L93 Difference]: Finished difference Result 452 states and 1242 transitions. [2021-06-05 21:28:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:52,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:52,859 INFO L225 Difference]: With dead ends: 452 [2021-06-05 21:28:52,859 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 21:28:52,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 21:28:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 318. [2021-06-05 21:28:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0725552050473186) internal successors, (974), 317 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 974 transitions. [2021-06-05 21:28:52,863 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 974 transitions. Word has length 17 [2021-06-05 21:28:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:52,863 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 974 transitions. [2021-06-05 21:28:52,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 974 transitions. [2021-06-05 21:28:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:52,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:52,864 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:53,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:53,064 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1933946680, now seen corresponding path program 100 times [2021-06-05 21:28:53,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:53,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220394217] [2021-06-05 21:28:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:53,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220394217] [2021-06-05 21:28:53,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220394217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707280260] [2021-06-05 21:28:53,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:53,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:53,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:53,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:53,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:53,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707280260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:53,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:53,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:53,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721122167] [2021-06-05 21:28:53,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:53,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:53,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:53,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:53,153 INFO L87 Difference]: Start difference. First operand 318 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:53,261 INFO L93 Difference]: Finished difference Result 444 states and 1227 transitions. [2021-06-05 21:28:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:53,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:53,262 INFO L225 Difference]: With dead ends: 444 [2021-06-05 21:28:53,262 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 21:28:53,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 21:28:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 332. [2021-06-05 21:28:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.090634441087613) internal successors, (1023), 331 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1023 transitions. [2021-06-05 21:28:53,267 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1023 transitions. Word has length 17 [2021-06-05 21:28:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:53,267 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1023 transitions. [2021-06-05 21:28:53,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1023 transitions. [2021-06-05 21:28:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:53,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:53,267 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:53,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:53,468 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2068989947, now seen corresponding path program 101 times [2021-06-05 21:28:53,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:53,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77867777] [2021-06-05 21:28:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:53,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:53,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77867777] [2021-06-05 21:28:53,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77867777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:53,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118218420] [2021-06-05 21:28:53,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:53,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:28:53,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:53,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:53,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118218420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:53,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:53,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:53,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514101523] [2021-06-05 21:28:53,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:53,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:53,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:53,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:53,562 INFO L87 Difference]: Start difference. First operand 332 states and 1023 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:53,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:53,657 INFO L93 Difference]: Finished difference Result 419 states and 1186 transitions. [2021-06-05 21:28:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:28:53,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:53,661 INFO L225 Difference]: With dead ends: 419 [2021-06-05 21:28:53,662 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 21:28:53,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:53,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 21:28:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 347. [2021-06-05 21:28:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0895953757225434) internal successors, (1069), 346 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1069 transitions. [2021-06-05 21:28:53,665 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1069 transitions. Word has length 17 [2021-06-05 21:28:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:53,666 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1069 transitions. [2021-06-05 21:28:53,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1069 transitions. [2021-06-05 21:28:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:53,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:53,666 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:53,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-06-05 21:28:53,867 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:53,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:53,867 INFO L82 PathProgramCache]: Analyzing trace with hash -615736580, now seen corresponding path program 102 times [2021-06-05 21:28:53,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:53,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259029122] [2021-06-05 21:28:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:53,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:53,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259029122] [2021-06-05 21:28:53,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259029122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:53,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279364722] [2021-06-05 21:28:53,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:53,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:28:53,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:53,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:53,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:53,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279364722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:53,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:53,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:53,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790530121] [2021-06-05 21:28:53,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:53,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:53,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:53,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:53,953 INFO L87 Difference]: Start difference. First operand 347 states and 1069 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:54,008 INFO L93 Difference]: Finished difference Result 413 states and 1199 transitions. [2021-06-05 21:28:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:54,009 INFO L225 Difference]: With dead ends: 413 [2021-06-05 21:28:54,009 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 21:28:54,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:28:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 21:28:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 347. [2021-06-05 21:28:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-06-05 21:28:54,015 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-06-05 21:28:54,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:54,015 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-06-05 21:28:54,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-06-05 21:28:54,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:54,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:54,016 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:54,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-05 21:28:54,229 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:54,229 INFO L82 PathProgramCache]: Analyzing trace with hash -742842411, now seen corresponding path program 103 times [2021-06-05 21:28:54,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:54,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225472802] [2021-06-05 21:28:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:54,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:54,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225472802] [2021-06-05 21:28:54,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225472802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:54,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50760384] [2021-06-05 21:28:54,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:54,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:54,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50760384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:54,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:54,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:54,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289724258] [2021-06-05 21:28:54,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:54,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:54,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:54,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:54,348 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:54,470 INFO L93 Difference]: Finished difference Result 418 states and 1194 transitions. [2021-06-05 21:28:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:54,472 INFO L225 Difference]: With dead ends: 418 [2021-06-05 21:28:54,472 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 21:28:54,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 21:28:54,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 347. [2021-06-05 21:28:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-06-05 21:28:54,477 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-06-05 21:28:54,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:54,477 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-06-05 21:28:54,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:54,477 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-06-05 21:28:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:54,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:54,478 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:54,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-06-05 21:28:54,699 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1948460984, now seen corresponding path program 104 times [2021-06-05 21:28:54,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:54,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425147395] [2021-06-05 21:28:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:54,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:54,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425147395] [2021-06-05 21:28:54,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425147395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:54,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164640858] [2021-06-05 21:28:54,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:54,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:54,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:54,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:54,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:54,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164640858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:54,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:54,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:54,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486172711] [2021-06-05 21:28:54,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:54,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:54,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:54,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:54,819 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:54,868 INFO L93 Difference]: Finished difference Result 411 states and 1195 transitions. [2021-06-05 21:28:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:54,870 INFO L225 Difference]: With dead ends: 411 [2021-06-05 21:28:54,870 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 21:28:54,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:28:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 21:28:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 345. [2021-06-05 21:28:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0930232558139537) internal successors, (1064), 344 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1064 transitions. [2021-06-05 21:28:54,875 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1064 transitions. Word has length 17 [2021-06-05 21:28:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:54,875 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1064 transitions. [2021-06-05 21:28:54,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1064 transitions. [2021-06-05 21:28:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:28:54,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:54,876 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:55,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:55,100 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:55,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2010299589, now seen corresponding path program 105 times [2021-06-05 21:28:55,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:55,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863826254] [2021-06-05 21:28:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:55,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:55,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863826254] [2021-06-05 21:28:55,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863826254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:55,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336185648] [2021-06-05 21:28:55,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:55,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:28:55,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:28:55,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:55,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336185648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:55,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:55,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:28:55,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949668889] [2021-06-05 21:28:55,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:55,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:55,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:55,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:55,221 INFO L87 Difference]: Start difference. First operand 345 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:55,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:55,385 INFO L93 Difference]: Finished difference Result 476 states and 1343 transitions. [2021-06-05 21:28:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:55,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:28:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:55,386 INFO L225 Difference]: With dead ends: 476 [2021-06-05 21:28:55,386 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 21:28:55,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 21:28:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 355. [2021-06-05 21:28:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0819209039548023) internal successors, (1091), 354 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1091 transitions. [2021-06-05 21:28:55,391 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1091 transitions. Word has length 17 [2021-06-05 21:28:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:55,391 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1091 transitions. [2021-06-05 21:28:55,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1091 transitions. [2021-06-05 21:28:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:28:55,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:55,392 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:55,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:55,597 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:55,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1640906887, now seen corresponding path program 106 times [2021-06-05 21:28:55,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:55,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975765101] [2021-06-05 21:28:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:55,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:55,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975765101] [2021-06-05 21:28:55,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975765101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:55,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65031131] [2021-06-05 21:28:55,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:55,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:55,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:55,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:28:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:55,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:55,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:28:56,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:56,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:56,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:56,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:28:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:56,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65031131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:56,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:56,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:28:56,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585006972] [2021-06-05 21:28:56,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:28:56,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:56,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:28:56,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:56,305 INFO L87 Difference]: Start difference. First operand 355 states and 1091 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:56,593 INFO L93 Difference]: Finished difference Result 425 states and 1234 transitions. [2021-06-05 21:28:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:28:56,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:28:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:56,594 INFO L225 Difference]: With dead ends: 425 [2021-06-05 21:28:56,594 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 21:28:56,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:28:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 21:28:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 369. [2021-06-05 21:28:56,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.078804347826087) internal successors, (1133), 368 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1133 transitions. [2021-06-05 21:28:56,600 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1133 transitions. Word has length 18 [2021-06-05 21:28:56,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:56,600 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1133 transitions. [2021-06-05 21:28:56,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1133 transitions. [2021-06-05 21:28:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:28:56,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:56,601 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:56,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:56,817 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:56,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1149194617, now seen corresponding path program 107 times [2021-06-05 21:28:56,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:56,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943572466] [2021-06-05 21:28:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:56,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:56,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943572466] [2021-06-05 21:28:56,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943572466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:56,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789785038] [2021-06-05 21:28:56,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:56,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:56,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:56,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:28:56,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:57,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:57,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:28:57,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:57,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:57,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:57,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:3 [2021-06-05 21:28:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:57,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789785038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:57,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:57,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:28:57,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207276128] [2021-06-05 21:28:57,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:28:57,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:57,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:28:57,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:57,582 INFO L87 Difference]: Start difference. First operand 369 states and 1133 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:57,824 INFO L93 Difference]: Finished difference Result 444 states and 1291 transitions. [2021-06-05 21:28:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:57,825 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:28:57,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:57,825 INFO L225 Difference]: With dead ends: 444 [2021-06-05 21:28:57,825 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 21:28:57,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 21:28:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 384. [2021-06-05 21:28:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-05 21:28:57,830 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-06-05 21:28:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:57,830 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-05 21:28:57,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-05 21:28:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:28:57,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:57,831 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:58,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1202 [2021-06-05 21:28:58,031 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:58,031 INFO L82 PathProgramCache]: Analyzing trace with hash -405611257, now seen corresponding path program 108 times [2021-06-05 21:28:58,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:58,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730204601] [2021-06-05 21:28:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:58,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:58,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730204601] [2021-06-05 21:28:58,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730204601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:58,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276960449] [2021-06-05 21:28:58,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:58,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:28:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:58,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:28:58,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:58,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:58,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:28:58,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:58,929 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:28:58,930 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:28:58,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:28:59,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:28:59,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:59,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:59,110 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:28:59,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:59,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:28:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:59,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276960449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:59,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:59,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:28:59,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780851135] [2021-06-05 21:28:59,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:28:59,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:28:59,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:59,144 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:59,490 INFO L93 Difference]: Finished difference Result 463 states and 1333 transitions. [2021-06-05 21:28:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:28:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:28:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:59,491 INFO L225 Difference]: With dead ends: 463 [2021-06-05 21:28:59,491 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 21:28:59,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:59,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 21:28:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 384. [2021-06-05 21:28:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-05 21:28:59,495 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-06-05 21:28:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:59,495 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-05 21:28:59,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-05 21:28:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:28:59,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:59,496 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:59,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:59,697 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:59,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1622768455, now seen corresponding path program 109 times [2021-06-05 21:28:59,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:59,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545079975] [2021-06-05 21:28:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:59,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:59,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545079975] [2021-06-05 21:28:59,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545079975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:59,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353508424] [2021-06-05 21:28:59,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:28:59,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:00,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:00,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:00,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:00,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:00,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:00,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:00,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353508424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:00,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:00,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:00,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778670676] [2021-06-05 21:29:00,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:00,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:00,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:00,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:00,263 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:00,556 INFO L93 Difference]: Finished difference Result 479 states and 1440 transitions. [2021-06-05 21:29:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:00,556 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:00,557 INFO L225 Difference]: With dead ends: 479 [2021-06-05 21:29:00,557 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 21:29:00,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 21:29:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-06-05 21:29:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.146919431279621) internal successors, (1328), 422 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1328 transitions. [2021-06-05 21:29:00,562 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1328 transitions. Word has length 18 [2021-06-05 21:29:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:00,562 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1328 transitions. [2021-06-05 21:29:00,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1328 transitions. [2021-06-05 21:29:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:00,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:00,563 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:00,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1417,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:00,763 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:00,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1928615481, now seen corresponding path program 110 times [2021-06-05 21:29:00,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:00,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990568179] [2021-06-05 21:29:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:00,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:00,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990568179] [2021-06-05 21:29:00,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990568179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:00,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159676372] [2021-06-05 21:29:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:00,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:00,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:00,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:00,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:01,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:01,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:01,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:01,470 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:01,470 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:01,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:01,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:01,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:01,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:01,896 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:01,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:01,897 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:01,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159676372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:01,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:01,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:01,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607498599] [2021-06-05 21:29:01,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:01,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:01,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:01,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:01,928 INFO L87 Difference]: Start difference. First operand 423 states and 1328 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:02,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:02,390 INFO L93 Difference]: Finished difference Result 513 states and 1501 transitions. [2021-06-05 21:29:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:29:02,390 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:02,391 INFO L225 Difference]: With dead ends: 513 [2021-06-05 21:29:02,391 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 21:29:02,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:29:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 21:29:02,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 422. [2021-06-05 21:29:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.125890736342043) internal successors, (1316), 421 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1316 transitions. [2021-06-05 21:29:02,396 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1316 transitions. Word has length 18 [2021-06-05 21:29:02,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:02,396 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1316 transitions. [2021-06-05 21:29:02,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1316 transitions. [2021-06-05 21:29:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:02,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:02,397 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:02,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-05 21:29:02,619 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:02,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1077471349, now seen corresponding path program 111 times [2021-06-05 21:29:02,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:02,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554091831] [2021-06-05 21:29:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:02,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:02,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554091831] [2021-06-05 21:29:02,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554091831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:02,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385672800] [2021-06-05 21:29:02,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:02,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:29:02,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:03,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:03,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:03,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:03,385 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:03,385 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:03,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:03,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:03,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:03,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:03,781 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:03,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:03,781 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:03,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385672800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:03,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:03,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:03,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501517854] [2021-06-05 21:29:03,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:03,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:03,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:03,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:03,808 INFO L87 Difference]: Start difference. First operand 422 states and 1316 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:04,153 INFO L93 Difference]: Finished difference Result 479 states and 1433 transitions. [2021-06-05 21:29:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:29:04,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:04,154 INFO L225 Difference]: With dead ends: 479 [2021-06-05 21:29:04,154 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 21:29:04,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:29:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 21:29:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 424. [2021-06-05 21:29:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1252955082742315) internal successors, (1322), 423 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1322 transitions. [2021-06-05 21:29:04,159 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1322 transitions. Word has length 18 [2021-06-05 21:29:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:04,159 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1322 transitions. [2021-06-05 21:29:04,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1322 transitions. [2021-06-05 21:29:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:04,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:04,160 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:04,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:04,360 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:04,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1654277767, now seen corresponding path program 112 times [2021-06-05 21:29:04,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:04,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112208280] [2021-06-05 21:29:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:04,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:04,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112208280] [2021-06-05 21:29:04,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112208280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:04,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130135593] [2021-06-05 21:29:04,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:04,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:04,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:04,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:04,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:04,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:04,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:04,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:04,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:04,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:04,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:04,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130135593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:04,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:04,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:04,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322356462] [2021-06-05 21:29:04,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:04,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:04,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:04,922 INFO L87 Difference]: Start difference. First operand 424 states and 1322 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:05,246 INFO L93 Difference]: Finished difference Result 515 states and 1560 transitions. [2021-06-05 21:29:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:05,247 INFO L225 Difference]: With dead ends: 515 [2021-06-05 21:29:05,247 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 21:29:05,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:05,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 21:29:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 458. [2021-06-05 21:29:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1531728665207877) internal successors, (1441), 457 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1441 transitions. [2021-06-05 21:29:05,252 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1441 transitions. Word has length 18 [2021-06-05 21:29:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:05,252 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1441 transitions. [2021-06-05 21:29:05,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1441 transitions. [2021-06-05 21:29:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:05,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:05,253 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:05,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:05,455 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:05,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1897106169, now seen corresponding path program 113 times [2021-06-05 21:29:05,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:05,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849938190] [2021-06-05 21:29:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:05,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:05,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849938190] [2021-06-05 21:29:05,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849938190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:05,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555485695] [2021-06-05 21:29:05,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:05,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:29:05,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:05,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:05,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:05,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:06,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:06,256 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:06,256 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:06,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:06,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:06,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:06,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:06,455 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:06,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:06,455 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:06,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555485695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:06,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:06,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:06,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450523879] [2021-06-05 21:29:06,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:06,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:06,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:06,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:06,483 INFO L87 Difference]: Start difference. First operand 458 states and 1441 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:07,074 INFO L93 Difference]: Finished difference Result 583 states and 1699 transitions. [2021-06-05 21:29:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:29:07,075 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:07,076 INFO L225 Difference]: With dead ends: 583 [2021-06-05 21:29:07,076 INFO L226 Difference]: Without dead ends: 557 [2021-06-05 21:29:07,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:29:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-05 21:29:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 462. [2021-06-05 21:29:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1496746203904555) internal successors, (1452), 461 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1452 transitions. [2021-06-05 21:29:07,084 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1452 transitions. Word has length 18 [2021-06-05 21:29:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:07,084 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1452 transitions. [2021-06-05 21:29:07,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:07,084 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1452 transitions. [2021-06-05 21:29:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:07,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:07,085 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:07,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-05 21:29:07,301 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:07,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1045962037, now seen corresponding path program 114 times [2021-06-05 21:29:07,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:07,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129483014] [2021-06-05 21:29:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:07,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:07,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129483014] [2021-06-05 21:29:07,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129483014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:07,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979104089] [2021-06-05 21:29:07,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:07,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:29:07,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:07,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:07,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:07,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:07,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:07,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:07,897 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:07,897 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:07,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:07,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:08,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:08,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:08,018 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:08,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:08,019 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:08,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979104089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:08,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:08,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:08,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497816207] [2021-06-05 21:29:08,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:08,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:08,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:08,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:08,045 INFO L87 Difference]: Start difference. First operand 462 states and 1452 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:08,497 INFO L93 Difference]: Finished difference Result 516 states and 1564 transitions. [2021-06-05 21:29:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:29:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:08,498 INFO L225 Difference]: With dead ends: 516 [2021-06-05 21:29:08,498 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 21:29:08,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:29:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 21:29:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 464. [2021-06-05 21:29:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-06-05 21:29:08,503 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-06-05 21:29:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:08,503 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-06-05 21:29:08,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-06-05 21:29:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:08,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:08,504 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:08,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:08,704 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:08,704 INFO L82 PathProgramCache]: Analyzing trace with hash -430297721, now seen corresponding path program 115 times [2021-06-05 21:29:08,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:08,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201909059] [2021-06-05 21:29:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:08,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:08,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201909059] [2021-06-05 21:29:08,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201909059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:08,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48380549] [2021-06-05 21:29:08,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:08,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:09,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:09,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:09,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:09,490 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:09,490 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:09,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:09,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:09,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:09,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:09,598 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:09,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:09,599 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:09,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48380549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:09,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:09,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:09,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656569530] [2021-06-05 21:29:09,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:09,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:09,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:09,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:09,625 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:10,044 INFO L93 Difference]: Finished difference Result 532 states and 1598 transitions. [2021-06-05 21:29:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:29:10,044 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:10,045 INFO L225 Difference]: With dead ends: 532 [2021-06-05 21:29:10,045 INFO L226 Difference]: Without dead ends: 522 [2021-06-05 21:29:10,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:29:10,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-05 21:29:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 464. [2021-06-05 21:29:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-06-05 21:29:10,050 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-06-05 21:29:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:10,050 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-06-05 21:29:10,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-06-05 21:29:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:10,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:10,051 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:10,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:10,253 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:10,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:10,253 INFO L82 PathProgramCache]: Analyzing trace with hash -486883791, now seen corresponding path program 116 times [2021-06-05 21:29:10,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:10,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406504812] [2021-06-05 21:29:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:29:10,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:10,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406504812] [2021-06-05 21:29:10,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406504812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:10,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598206824] [2021-06-05 21:29:10,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:10,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:10,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:10,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:10,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:10,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:10,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:10,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:10,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:10,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:10,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:10,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598206824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:10,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:10,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-06-05 21:29:10,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24917032] [2021-06-05 21:29:10,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:29:10,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:10,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:29:10,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:29:10,856 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:11,016 INFO L93 Difference]: Finished difference Result 485 states and 1487 transitions. [2021-06-05 21:29:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:29:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:11,017 INFO L225 Difference]: With dead ends: 485 [2021-06-05 21:29:11,017 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 21:29:11,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 21:29:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2021-06-05 21:29:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:11,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-06-05 21:29:11,024 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-06-05 21:29:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:11,024 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-06-05 21:29:11,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-06-05 21:29:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:11,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:11,025 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:11,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2163,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:11,229 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:11,229 INFO L82 PathProgramCache]: Analyzing trace with hash -100682677, now seen corresponding path program 117 times [2021-06-05 21:29:11,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:11,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437072830] [2021-06-05 21:29:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:11,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:11,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437072830] [2021-06-05 21:29:11,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437072830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:11,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708129992] [2021-06-05 21:29:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:11,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:29:11,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:11,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:11,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:11,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:11,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:11,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:11,923 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:11,924 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:11,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:12,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:12,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:12,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:12,404 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:12,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:12,405 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:12,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708129992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:12,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:12,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:29:12,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047818709] [2021-06-05 21:29:12,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:12,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:12,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:12,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:12,431 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:12,778 INFO L93 Difference]: Finished difference Result 544 states and 1603 transitions. [2021-06-05 21:29:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:29:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:12,780 INFO L225 Difference]: With dead ends: 544 [2021-06-05 21:29:12,780 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 21:29:12,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:29:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 21:29:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 464. [2021-06-05 21:29:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-06-05 21:29:12,787 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-06-05 21:29:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:12,788 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-06-05 21:29:12,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-06-05 21:29:12,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:12,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:12,789 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:13,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2246 [2021-06-05 21:29:13,005 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 437172901, now seen corresponding path program 118 times [2021-06-05 21:29:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:13,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740502224] [2021-06-05 21:29:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:13,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740502224] [2021-06-05 21:29:13,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740502224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277211725] [2021-06-05 21:29:13,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:13,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:13,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:13,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:13,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:13,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:13,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:13,664 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:13,665 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:13,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:13,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:13,870 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:13,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:13,889 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:13,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:13,890 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:13,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277211725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:13,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:13,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:13,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633887705] [2021-06-05 21:29:13,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:13,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:13,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:13,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:13,924 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:14,515 INFO L93 Difference]: Finished difference Result 595 states and 1709 transitions. [2021-06-05 21:29:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:29:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:14,516 INFO L225 Difference]: With dead ends: 595 [2021-06-05 21:29:14,516 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 21:29:14,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:29:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 21:29:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 455. [2021-06-05 21:29:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.13215859030837) internal successors, (1422), 454 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1422 transitions. [2021-06-05 21:29:14,522 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1422 transitions. Word has length 18 [2021-06-05 21:29:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:14,522 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1422 transitions. [2021-06-05 21:29:14,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1422 transitions. [2021-06-05 21:29:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:14,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:14,522 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:14,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2404,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:14,723 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:14,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1052837217, now seen corresponding path program 119 times [2021-06-05 21:29:14,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:14,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827274527] [2021-06-05 21:29:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:14,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:14,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827274527] [2021-06-05 21:29:14,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827274527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:14,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837748034] [2021-06-05 21:29:14,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:14,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:29:14,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:14,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 21:29:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:15,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:15,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 35 treesize of output 252 [2021-06-05 21:29:16,146 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 223 [2021-06-05 21:29:16,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:16,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:16,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:17,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:17,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:17,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 21:29:18,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:18,392 INFO L628 ElimStorePlain]: treesize reduction 40, result has 27.3 percent of original size [2021-06-05 21:29:18,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:18,393 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:15 [2021-06-05 21:29:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:18,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837748034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:18,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:18,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:18,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619568476] [2021-06-05 21:29:18,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:18,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:18,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:18,420 INFO L87 Difference]: Start difference. First operand 455 states and 1422 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:18,815 INFO L93 Difference]: Finished difference Result 521 states and 1560 transitions. [2021-06-05 21:29:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:29:18,815 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:18,816 INFO L225 Difference]: With dead ends: 521 [2021-06-05 21:29:18,816 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 21:29:18,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:29:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 21:29:18,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 456. [2021-06-05 21:29:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.131868131868132) internal successors, (1425), 455 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1425 transitions. [2021-06-05 21:29:18,821 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1425 transitions. Word has length 18 [2021-06-05 21:29:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:18,821 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1425 transitions. [2021-06-05 21:29:18,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1425 transitions. [2021-06-05 21:29:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:18,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:18,822 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:19,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2515 [2021-06-05 21:29:19,022 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:19,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:19,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1663900857, now seen corresponding path program 120 times [2021-06-05 21:29:19,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:19,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667180005] [2021-06-05 21:29:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:19,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:19,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667180005] [2021-06-05 21:29:19,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667180005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:19,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331205947] [2021-06-05 21:29:19,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:19,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:29:19,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:19,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:19,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:19,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:19,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:19,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:19,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:19,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:19,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:19,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331205947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:19,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:19,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:19,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26328986] [2021-06-05 21:29:19,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:19,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:19,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:19,555 INFO L87 Difference]: Start difference. First operand 456 states and 1425 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:19,878 INFO L93 Difference]: Finished difference Result 558 states and 1698 transitions. [2021-06-05 21:29:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:19,878 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:19,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:19,879 INFO L225 Difference]: With dead ends: 558 [2021-06-05 21:29:19,879 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 21:29:19,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 21:29:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 500. [2021-06-05 21:29:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.158316633266533) internal successors, (1576), 499 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1576 transitions. [2021-06-05 21:29:19,885 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1576 transitions. Word has length 18 [2021-06-05 21:29:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:19,885 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1576 transitions. [2021-06-05 21:29:19,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1576 transitions. [2021-06-05 21:29:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:19,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:19,886 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:20,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:20,087 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:20,087 INFO L82 PathProgramCache]: Analyzing trace with hash -920317497, now seen corresponding path program 121 times [2021-06-05 21:29:20,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:20,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021413099] [2021-06-05 21:29:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:20,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:20,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021413099] [2021-06-05 21:29:20,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021413099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:20,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705877965] [2021-06-05 21:29:20,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:20,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:20,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:20,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:20,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:20,741 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:20,742 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:20,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:20,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:20,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:20,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:20,889 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:20,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:20,890 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:20,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705877965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:20,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:20,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:20,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955618364] [2021-06-05 21:29:20,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:20,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:20,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:20,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:20,921 INFO L87 Difference]: Start difference. First operand 500 states and 1576 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:21,565 INFO L93 Difference]: Finished difference Result 647 states and 1895 transitions. [2021-06-05 21:29:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:29:21,566 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:21,567 INFO L225 Difference]: With dead ends: 647 [2021-06-05 21:29:21,567 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 21:29:21,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:29:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 21:29:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 506. [2021-06-05 21:29:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1623762376237625) internal successors, (1597), 505 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1597 transitions. [2021-06-05 21:29:21,576 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1597 transitions. Word has length 18 [2021-06-05 21:29:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:21,576 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1597 transitions. [2021-06-05 21:29:21,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1597 transitions. [2021-06-05 21:29:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:21,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:21,577 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:21,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3060 [2021-06-05 21:29:21,793 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:21,793 INFO L82 PathProgramCache]: Analyzing trace with hash -69173365, now seen corresponding path program 122 times [2021-06-05 21:29:21,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:21,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447607952] [2021-06-05 21:29:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:21,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:21,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447607952] [2021-06-05 21:29:21,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447607952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:21,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380683287] [2021-06-05 21:29:21,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:21,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:21,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:21,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:22,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:22,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:22,428 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:22,429 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:22,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:22,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:22,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:22,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:22,725 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:22,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:22,725 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:22,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380683287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:22,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:22,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:22,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878502012] [2021-06-05 21:29:22,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:22,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:22,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:22,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:22,752 INFO L87 Difference]: Start difference. First operand 506 states and 1597 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:23,480 INFO L93 Difference]: Finished difference Result 727 states and 2070 transitions. [2021-06-05 21:29:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:29:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:23,481 INFO L225 Difference]: With dead ends: 727 [2021-06-05 21:29:23,481 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 21:29:23,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 557.6ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:29:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 21:29:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 507. [2021-06-05 21:29:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-05 21:29:23,488 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-05 21:29:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:23,488 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-05 21:29:23,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-05 21:29:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:23,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:23,488 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:23,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3155 [2021-06-05 21:29:23,689 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash 546490951, now seen corresponding path program 123 times [2021-06-05 21:29:23,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:23,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707310623] [2021-06-05 21:29:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:23,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:23,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707310623] [2021-06-05 21:29:23,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707310623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:23,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812758924] [2021-06-05 21:29:23,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:23,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:29:23,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:23,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:24,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:24,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:24,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:24,323 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:24,323 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:24,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:24,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:24,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:24,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:24,780 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:24,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:24,781 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:24,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812758924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:24,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:24,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:24,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791421040] [2021-06-05 21:29:24,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:24,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:24,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:24,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:24,808 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:25,232 INFO L93 Difference]: Finished difference Result 598 states and 1790 transitions. [2021-06-05 21:29:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:29:25,232 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:25,233 INFO L225 Difference]: With dead ends: 598 [2021-06-05 21:29:25,233 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 21:29:25,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:29:25,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 21:29:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 507. [2021-06-05 21:29:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-05 21:29:25,238 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-05 21:29:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:25,239 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-05 21:29:25,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-05 21:29:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:25,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:25,239 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:25,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-06-05 21:29:25,440 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:25,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1842751733, now seen corresponding path program 124 times [2021-06-05 21:29:25,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:25,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554408981] [2021-06-05 21:29:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:25,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:25,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554408981] [2021-06-05 21:29:25,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554408981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:25,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799044754] [2021-06-05 21:29:25,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:25,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:25,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:25,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:25,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:25,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:25,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:25,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:26,116 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:26,117 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:26,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:26,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:26,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:26,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:26,562 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:26,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:26,563 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:26,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799044754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:26,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:26,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:26,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693156850] [2021-06-05 21:29:26,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:26,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:26,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:26,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:26,591 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:27,090 INFO L93 Difference]: Finished difference Result 608 states and 1810 transitions. [2021-06-05 21:29:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:29:27,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:27,092 INFO L225 Difference]: With dead ends: 608 [2021-06-05 21:29:27,092 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 21:29:27,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 504.5ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:29:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 21:29:27,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 507. [2021-06-05 21:29:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:27,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-05 21:29:27,101 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-05 21:29:27,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:27,101 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-05 21:29:27,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-05 21:29:27,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:27,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:27,102 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:27,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-06-05 21:29:27,317 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1754340969, now seen corresponding path program 125 times [2021-06-05 21:29:27,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:27,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228150370] [2021-06-05 21:29:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:27,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:27,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228150370] [2021-06-05 21:29:27,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228150370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:27,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72831383] [2021-06-05 21:29:27,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:27,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:29:27,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:27,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:27,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:27,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:27,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:27,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:27,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:27,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72831383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:27,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:27,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:29:27,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166641323] [2021-06-05 21:29:27,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:27,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:27,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:27,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:27,855 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:28,104 INFO L93 Difference]: Finished difference Result 537 states and 1638 transitions. [2021-06-05 21:29:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:29:28,104 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:28,105 INFO L225 Difference]: With dead ends: 537 [2021-06-05 21:29:28,105 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 21:29:28,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:29:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 21:29:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 507. [2021-06-05 21:29:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-06-05 21:29:28,110 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-06-05 21:29:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:28,110 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-06-05 21:29:28,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:28,111 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-06-05 21:29:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:28,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:28,111 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:28,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-05 21:29:28,325 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash -214619961, now seen corresponding path program 126 times [2021-06-05 21:29:28,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:28,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439206442] [2021-06-05 21:29:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:28,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:28,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439206442] [2021-06-05 21:29:28,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439206442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:28,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494353204] [2021-06-05 21:29:28,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:28,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:29:28,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:28,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:28,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:28,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:28,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:28,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:28,964 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:28,964 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:28,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:29,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:29,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:29,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:29,106 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:29,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:29,107 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:29,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494353204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:29,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:29,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:29,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682413802] [2021-06-05 21:29:29,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:29,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:29,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:29,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:29,132 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:29,604 INFO L93 Difference]: Finished difference Result 618 states and 1823 transitions. [2021-06-05 21:29:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:29:29,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:29,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:29,605 INFO L225 Difference]: With dead ends: 618 [2021-06-05 21:29:29,605 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 21:29:29,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 447.9ms TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:29:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 21:29:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 507. [2021-06-05 21:29:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-06-05 21:29:29,613 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-06-05 21:29:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:29,613 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-06-05 21:29:29,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-06-05 21:29:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:29,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:29,614 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:29,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-06-05 21:29:29,829 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -720966227, now seen corresponding path program 127 times [2021-06-05 21:29:29,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:29,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807046015] [2021-06-05 21:29:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:29,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:29,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807046015] [2021-06-05 21:29:29,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807046015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:29,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391949191] [2021-06-05 21:29:29,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:29,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:29,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:30,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:30,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:30,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:30,566 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:30,566 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:30,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:31,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:31,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:31,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:31,025 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:31,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:31,026 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:31,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391949191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:31,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:31,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:31,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482338755] [2021-06-05 21:29:31,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:31,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:31,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:31,052 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:31,682 INFO L93 Difference]: Finished difference Result 681 states and 1975 transitions. [2021-06-05 21:29:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:29:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:31,684 INFO L225 Difference]: With dead ends: 681 [2021-06-05 21:29:31,684 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 21:29:31,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:29:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 21:29:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 497. [2021-06-05 21:29:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1330645161290325) internal successors, (1554), 496 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1554 transitions. [2021-06-05 21:29:31,689 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1554 transitions. Word has length 18 [2021-06-05 21:29:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:31,690 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1554 transitions. [2021-06-05 21:29:31,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1554 transitions. [2021-06-05 21:29:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:31,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:31,690 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:31,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3742,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:31,891 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:31,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1184758385, now seen corresponding path program 128 times [2021-06-05 21:29:31,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:31,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114395460] [2021-06-05 21:29:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:31,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:31,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114395460] [2021-06-05 21:29:31,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114395460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:31,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211261508] [2021-06-05 21:29:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:32,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:32,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:32,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:32,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:32,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:32,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:32,495 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:32,496 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:32,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:32,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:32,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:32,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:32,677 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:32,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:32,678 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:32,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211261508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:32,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:32,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:32,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585437171] [2021-06-05 21:29:32,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:32,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:32,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:32,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:32,705 INFO L87 Difference]: Start difference. First operand 497 states and 1554 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:33,167 INFO L93 Difference]: Finished difference Result 595 states and 1767 transitions. [2021-06-05 21:29:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:29:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:33,168 INFO L225 Difference]: With dead ends: 595 [2021-06-05 21:29:33,168 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 21:29:33,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:29:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 21:29:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 498. [2021-06-05 21:29:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.132796780684105) internal successors, (1557), 497 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1557 transitions. [2021-06-05 21:29:33,173 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1557 transitions. Word has length 18 [2021-06-05 21:29:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:33,173 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1557 transitions. [2021-06-05 21:29:33,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1557 transitions. [2021-06-05 21:29:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:33,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:33,174 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:33,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:33,375 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:33,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1448223097, now seen corresponding path program 129 times [2021-06-05 21:29:33,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:33,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257910346] [2021-06-05 21:29:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:33,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:33,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257910346] [2021-06-05 21:29:33,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257910346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:33,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436384940] [2021-06-05 21:29:33,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:33,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:29:33,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:33,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:33,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:33,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:34,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:34,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:34,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:34,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:34,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436384940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:34,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:34,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:34,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962566944] [2021-06-05 21:29:34,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:34,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:34,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:34,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:34,056 INFO L87 Difference]: Start difference. First operand 498 states and 1557 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:34,329 INFO L93 Difference]: Finished difference Result 613 states and 1879 transitions. [2021-06-05 21:29:34,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:34,330 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:34,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:34,330 INFO L225 Difference]: With dead ends: 613 [2021-06-05 21:29:34,330 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 21:29:34,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 21:29:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 570. [2021-06-05 21:29:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.154657293497364) internal successors, (1795), 569 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1795 transitions. [2021-06-05 21:29:34,336 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1795 transitions. Word has length 18 [2021-06-05 21:29:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:34,337 INFO L482 AbstractCegarLoop]: Abstraction has 570 states and 1795 transitions. [2021-06-05 21:29:34,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1795 transitions. [2021-06-05 21:29:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:34,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:34,337 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:34,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4029 [2021-06-05 21:29:34,538 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash -704639737, now seen corresponding path program 130 times [2021-06-05 21:29:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:34,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223230806] [2021-06-05 21:29:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:34,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:34,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223230806] [2021-06-05 21:29:34,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223230806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:34,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812428080] [2021-06-05 21:29:34,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:34,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:34,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:34,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:34,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:34,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:34,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:35,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:35,248 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:35,248 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:35,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:35,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:35,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:35,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:35,578 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:35,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:35,579 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:35,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812428080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:35,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:35,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:35,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100406024] [2021-06-05 21:29:35,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:35,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:35,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:35,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:35,608 INFO L87 Difference]: Start difference. First operand 570 states and 1795 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:36,391 INFO L93 Difference]: Finished difference Result 700 states and 2080 transitions. [2021-06-05 21:29:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:29:36,391 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:36,392 INFO L225 Difference]: With dead ends: 700 [2021-06-05 21:29:36,392 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 21:29:36,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:29:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 21:29:36,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 573. [2021-06-05 21:29:36,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1573426573426575) internal successors, (1806), 572 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1806 transitions. [2021-06-05 21:29:36,399 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1806 transitions. Word has length 18 [2021-06-05 21:29:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:36,399 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1806 transitions. [2021-06-05 21:29:36,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1806 transitions. [2021-06-05 21:29:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:36,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:36,399 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:36,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:36,600 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash 146504395, now seen corresponding path program 131 times [2021-06-05 21:29:36,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:36,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640081591] [2021-06-05 21:29:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:36,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:36,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640081591] [2021-06-05 21:29:36,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640081591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:36,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900844029] [2021-06-05 21:29:36,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:36,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:29:36,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:36,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:36,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:36,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:36,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:37,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:37,242 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:37,243 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:37,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:37,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:37,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:37,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:37,503 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:37,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:37,504 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:37,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900844029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:37,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:37,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:37,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568003889] [2021-06-05 21:29:37,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:37,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:37,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:37,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:37,531 INFO L87 Difference]: Start difference. First operand 573 states and 1806 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:38,054 INFO L93 Difference]: Finished difference Result 692 states and 2071 transitions. [2021-06-05 21:29:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:29:38,054 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:38,055 INFO L225 Difference]: With dead ends: 692 [2021-06-05 21:29:38,055 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 21:29:38,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:29:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 21:29:38,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 591. [2021-06-05 21:29:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1627118644067798) internal successors, (1866), 590 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1866 transitions. [2021-06-05 21:29:38,064 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1866 transitions. Word has length 18 [2021-06-05 21:29:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:38,064 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1866 transitions. [2021-06-05 21:29:38,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1866 transitions. [2021-06-05 21:29:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:38,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:38,065 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:38,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4249,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:38,287 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:38,287 INFO L82 PathProgramCache]: Analyzing trace with hash 762168711, now seen corresponding path program 132 times [2021-06-05 21:29:38,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:38,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393849203] [2021-06-05 21:29:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:38,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:38,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393849203] [2021-06-05 21:29:38,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393849203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:38,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502649408] [2021-06-05 21:29:38,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:38,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:29:38,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:38,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:38,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:38,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:38,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:38,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:38,950 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:38,950 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:38,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:39,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:39,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:39,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:39,099 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:39,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:39,099 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:39,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502649408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:39,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:39,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:39,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420758138] [2021-06-05 21:29:39,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:39,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:39,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:39,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:39,126 INFO L87 Difference]: Start difference. First operand 591 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:39,772 INFO L93 Difference]: Finished difference Result 752 states and 2200 transitions. [2021-06-05 21:29:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:29:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:39,774 INFO L225 Difference]: With dead ends: 752 [2021-06-05 21:29:39,774 INFO L226 Difference]: Without dead ends: 730 [2021-06-05 21:29:39,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 604.6ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:29:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-06-05 21:29:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 593. [2021-06-05 21:29:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-05 21:29:39,781 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-05 21:29:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:39,781 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-05 21:29:39,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-05 21:29:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:39,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:39,782 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:39,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4371,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:39,982 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:39,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1627073973, now seen corresponding path program 133 times [2021-06-05 21:29:39,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:39,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565396839] [2021-06-05 21:29:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:40,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:40,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565396839] [2021-06-05 21:29:40,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565396839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:40,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220446463] [2021-06-05 21:29:40,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:40,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:40,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:40,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:40,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:40,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:40,639 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:40,640 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:40,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:40,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:40,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:40,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:40,852 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:40,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:40,853 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:40,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220446463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:40,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:40,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:40,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131627603] [2021-06-05 21:29:40,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:40,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:40,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:40,879 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:41,403 INFO L93 Difference]: Finished difference Result 683 states and 2069 transitions. [2021-06-05 21:29:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:29:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:41,404 INFO L225 Difference]: With dead ends: 683 [2021-06-05 21:29:41,404 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 21:29:41,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 534.2ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:29:41,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 21:29:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 593. [2021-06-05 21:29:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-05 21:29:41,411 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-05 21:29:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:41,411 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-05 21:29:41,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-05 21:29:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:41,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:41,412 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:41,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4478,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:41,612 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:41,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:41,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1615814151, now seen corresponding path program 134 times [2021-06-05 21:29:41,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:41,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038486728] [2021-06-05 21:29:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:41,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:41,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038486728] [2021-06-05 21:29:41,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038486728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:41,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159153415] [2021-06-05 21:29:41,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:41,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:41,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:41,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:41,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:42,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:42,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:42,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:42,280 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:42,280 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:42,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:42,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:42,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:42,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:42,393 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:42,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:42,394 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:42,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159153415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:42,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:42,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:42,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644053026] [2021-06-05 21:29:42,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:42,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:42,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:42,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:42,420 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:42,881 INFO L93 Difference]: Finished difference Result 681 states and 2066 transitions. [2021-06-05 21:29:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:29:42,881 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:42,882 INFO L225 Difference]: With dead ends: 681 [2021-06-05 21:29:42,882 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 21:29:42,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:29:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 21:29:42,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 593. [2021-06-05 21:29:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-05 21:29:42,888 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-05 21:29:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:42,888 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-05 21:29:42,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-05 21:29:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:42,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:42,889 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:43,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4596 [2021-06-05 21:29:43,111 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:43,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1904159473, now seen corresponding path program 135 times [2021-06-05 21:29:43,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:43,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011302774] [2021-06-05 21:29:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:43,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:43,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011302774] [2021-06-05 21:29:43,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011302774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:43,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365068876] [2021-06-05 21:29:43,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:43,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:29:43,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:43,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:43,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:43,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:43,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:43,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:43,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:43,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:43,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365068876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:43,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:43,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:43,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359362627] [2021-06-05 21:29:43,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:43,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:43,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:43,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:43,612 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:43,925 INFO L93 Difference]: Finished difference Result 630 states and 1927 transitions. [2021-06-05 21:29:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:43,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:43,927 INFO L225 Difference]: With dead ends: 630 [2021-06-05 21:29:43,927 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 21:29:43,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:29:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 21:29:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 593. [2021-06-05 21:29:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-06-05 21:29:43,933 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 18 [2021-06-05 21:29:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:43,933 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-06-05 21:29:43,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-06-05 21:29:43,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:43,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:43,934 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:44,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4692 [2021-06-05 21:29:44,135 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:44,136 INFO L82 PathProgramCache]: Analyzing trace with hash 548291531, now seen corresponding path program 136 times [2021-06-05 21:29:44,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:44,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7505275] [2021-06-05 21:29:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:44,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:44,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7505275] [2021-06-05 21:29:44,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7505275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:44,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170165280] [2021-06-05 21:29:44,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:44,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:44,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:44,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:44,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:44,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:44,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:44,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:44,867 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:44,868 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:44,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:45,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:45,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:45,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:45,066 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:45,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:45,066 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:45,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170165280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:45,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:45,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:45,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996240891] [2021-06-05 21:29:45,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:45,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:45,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:45,093 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:45,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:45,706 INFO L93 Difference]: Finished difference Result 747 states and 2217 transitions. [2021-06-05 21:29:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:29:45,706 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:45,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:45,707 INFO L225 Difference]: With dead ends: 747 [2021-06-05 21:29:45,707 INFO L226 Difference]: Without dead ends: 737 [2021-06-05 21:29:45,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:29:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-05 21:29:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 599. [2021-06-05 21:29:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.1538461538461537) internal successors, (1886), 598 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1886 transitions. [2021-06-05 21:29:45,714 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1886 transitions. Word has length 18 [2021-06-05 21:29:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:45,714 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1886 transitions. [2021-06-05 21:29:45,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1886 transitions. [2021-06-05 21:29:45,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:45,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:45,715 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:45,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4740,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:45,916 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:45,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2031426469, now seen corresponding path program 137 times [2021-06-05 21:29:45,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:45,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556033910] [2021-06-05 21:29:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:46,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:46,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556033910] [2021-06-05 21:29:46,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556033910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:46,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606287211] [2021-06-05 21:29:46,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:46,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:29:46,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:46,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:46,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:46,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:46,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:46,673 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:46,673 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:46,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:46,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:46,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:46,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:46,787 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:46,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:46,788 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:46,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606287211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:46,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:46,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:46,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865506213] [2021-06-05 21:29:46,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:46,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:46,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:46,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:46,814 INFO L87 Difference]: Start difference. First operand 599 states and 1886 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:47,512 INFO L93 Difference]: Finished difference Result 777 states and 2279 transitions. [2021-06-05 21:29:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:29:47,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:47,514 INFO L225 Difference]: With dead ends: 777 [2021-06-05 21:29:47,514 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 21:29:47,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 706.6ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:29:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 21:29:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 597. [2021-06-05 21:29:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-06-05 21:29:47,520 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-06-05 21:29:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:47,520 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-06-05 21:29:47,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-06-05 21:29:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:47,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:47,521 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:47,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:47,722 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:47,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:47,722 INFO L82 PathProgramCache]: Analyzing trace with hash 979347297, now seen corresponding path program 138 times [2021-06-05 21:29:47,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:47,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70724857] [2021-06-05 21:29:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:47,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:47,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70724857] [2021-06-05 21:29:47,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70724857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:47,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500980211] [2021-06-05 21:29:47,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:47,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:29:47,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:47,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:48,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:48,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:48,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:48,326 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:48,327 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:48,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:48,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:48,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:48,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:48,593 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:48,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:48,594 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:48,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500980211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:48,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:48,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:48,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41170851] [2021-06-05 21:29:48,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:48,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:48,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:48,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:48,619 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:49,154 INFO L93 Difference]: Finished difference Result 676 states and 2054 transitions. [2021-06-05 21:29:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:29:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:49,155 INFO L225 Difference]: With dead ends: 676 [2021-06-05 21:29:49,155 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 21:29:49,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:29:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 21:29:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 597. [2021-06-05 21:29:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-06-05 21:29:49,161 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-06-05 21:29:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:49,162 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-06-05 21:29:49,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-06-05 21:29:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:49,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:49,162 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:49,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4998,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:49,363 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:49,363 INFO L82 PathProgramCache]: Analyzing trace with hash 942820167, now seen corresponding path program 139 times [2021-06-05 21:29:49,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:49,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748423275] [2021-06-05 21:29:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:49,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:49,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748423275] [2021-06-05 21:29:49,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748423275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:49,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315952177] [2021-06-05 21:29:49,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:49,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:49,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:49,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:49,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:49,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:49,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:49,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:49,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:49,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315952177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:49,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:49,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:49,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130064912] [2021-06-05 21:29:49,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:49,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:49,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:49,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:49,835 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:50,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:50,087 INFO L93 Difference]: Finished difference Result 707 states and 2181 transitions. [2021-06-05 21:29:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:50,088 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:50,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:50,089 INFO L225 Difference]: With dead ends: 707 [2021-06-05 21:29:50,089 INFO L226 Difference]: Without dead ends: 691 [2021-06-05 21:29:50,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-05 21:29:50,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 667. [2021-06-05 21:29:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.165165165165165) internal successors, (2108), 666 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2108 transitions. [2021-06-05 21:29:50,097 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2108 transitions. Word has length 18 [2021-06-05 21:29:50,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:50,097 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2108 transitions. [2021-06-05 21:29:50,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:50,097 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2108 transitions. [2021-06-05 21:29:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:50,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:50,098 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:50,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5114,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:50,299 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:50,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1686403527, now seen corresponding path program 140 times [2021-06-05 21:29:50,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:50,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529274536] [2021-06-05 21:29:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:50,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:50,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529274536] [2021-06-05 21:29:50,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529274536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:50,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322004400] [2021-06-05 21:29:50,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:50,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:50,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:50,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:50,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:50,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:50,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:51,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:51,190 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:51,191 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:51,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:51,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:51,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:51,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:51,424 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:51,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:51,425 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:51,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322004400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:51,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:51,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:51,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31163676] [2021-06-05 21:29:51,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:51,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:51,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:51,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:51,459 INFO L87 Difference]: Start difference. First operand 667 states and 2108 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:52,158 INFO L93 Difference]: Finished difference Result 772 states and 2340 transitions. [2021-06-05 21:29:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:29:52,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:52,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:52,160 INFO L225 Difference]: With dead ends: 772 [2021-06-05 21:29:52,160 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 21:29:52,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 561.8ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:29:52,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 21:29:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 670. [2021-06-05 21:29:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1689088191330343) internal successors, (2120), 669 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2120 transitions. [2021-06-05 21:29:52,168 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2120 transitions. Word has length 18 [2021-06-05 21:29:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:52,168 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 2120 transitions. [2021-06-05 21:29:52,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2120 transitions. [2021-06-05 21:29:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:52,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:52,169 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:52,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5168 [2021-06-05 21:29:52,369 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:52,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:52,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1757419637, now seen corresponding path program 141 times [2021-06-05 21:29:52,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:52,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011196657] [2021-06-05 21:29:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:52,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011196657] [2021-06-05 21:29:52,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011196657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086136095] [2021-06-05 21:29:52,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:52,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:29:52,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:52,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:52,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:53,061 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:53,061 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:53,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:53,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:53,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:53,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:53,304 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:53,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:53,305 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:53,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086136095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:53,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:53,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:53,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213390587] [2021-06-05 21:29:53,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:53,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:53,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:53,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:53,331 INFO L87 Difference]: Start difference. First operand 670 states and 2120 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:53,978 INFO L93 Difference]: Finished difference Result 788 states and 2394 transitions. [2021-06-05 21:29:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:29:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:53,979 INFO L225 Difference]: With dead ends: 788 [2021-06-05 21:29:53,979 INFO L226 Difference]: Without dead ends: 778 [2021-06-05 21:29:53,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:29:53,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-06-05 21:29:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 695. [2021-06-05 21:29:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.1714697406340058) internal successors, (2201), 694 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2201 transitions. [2021-06-05 21:29:53,986 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2201 transitions. Word has length 18 [2021-06-05 21:29:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:53,986 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2201 transitions. [2021-06-05 21:29:53,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2201 transitions. [2021-06-05 21:29:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:53,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:53,987 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:54,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5316 [2021-06-05 21:29:54,188 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1141755321, now seen corresponding path program 142 times [2021-06-05 21:29:54,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:54,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729536983] [2021-06-05 21:29:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:54,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:54,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729536983] [2021-06-05 21:29:54,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729536983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:54,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305057718] [2021-06-05 21:29:54,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:54,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:54,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:54,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:54,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:54,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:54,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:54,823 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:54,823 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:54,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:54,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:54,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:54,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:54,971 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:54,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:54,972 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:55,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305057718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:55,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:55,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:29:55,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860206729] [2021-06-05 21:29:55,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:29:55,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:55,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:29:55,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:55,005 INFO L87 Difference]: Start difference. First operand 695 states and 2201 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:55,495 INFO L93 Difference]: Finished difference Result 836 states and 2495 transitions. [2021-06-05 21:29:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:29:55,495 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:55,496 INFO L225 Difference]: With dead ends: 836 [2021-06-05 21:29:55,496 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 21:29:55,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 508.7ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:29:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 21:29:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 705. [2021-06-05 21:29:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.171875) internal successors, (2233), 704 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2233 transitions. [2021-06-05 21:29:55,504 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2233 transitions. Word has length 18 [2021-06-05 21:29:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:55,504 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2233 transitions. [2021-06-05 21:29:55,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2233 transitions. [2021-06-05 21:29:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:55,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:55,505 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:55,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5417,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:55,705 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:55,706 INFO L82 PathProgramCache]: Analyzing trace with hash 763969291, now seen corresponding path program 143 times [2021-06-05 21:29:55,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:55,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324243315] [2021-06-05 21:29:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:55,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:55,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324243315] [2021-06-05 21:29:55,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324243315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:55,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896064874] [2021-06-05 21:29:55,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:55,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:29:55,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:55,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:56,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:56,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:56,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:56,319 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:56,319 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:56,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:56,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:56,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:56,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:56,648 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:56,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:56,649 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:56,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896064874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:56,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:56,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:56,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115531408] [2021-06-05 21:29:56,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:56,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:56,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:56,676 INFO L87 Difference]: Start difference. First operand 705 states and 2233 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:57,421 INFO L93 Difference]: Finished difference Result 890 states and 2620 transitions. [2021-06-05 21:29:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:29:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:57,422 INFO L225 Difference]: With dead ends: 890 [2021-06-05 21:29:57,423 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 21:29:57,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 700.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1876, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:29:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 21:29:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 705. [2021-06-05 21:29:57,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-05 21:29:57,430 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-05 21:29:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:57,431 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-05 21:29:57,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-05 21:29:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:57,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:57,431 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:57,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5511,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:57,632 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:57,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:57,632 INFO L82 PathProgramCache]: Analyzing trace with hash -288109881, now seen corresponding path program 144 times [2021-06-05 21:29:57,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:57,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626091470] [2021-06-05 21:29:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:57,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:57,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626091470] [2021-06-05 21:29:57,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626091470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:57,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912709482] [2021-06-05 21:29:57,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:57,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:29:57,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:57,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:57,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:58,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:58,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:58,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:58,420 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:29:58,420 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:29:58,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:29:58,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:29:58,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:29:58,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:58,545 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:29:58,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:58,546 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:29:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:58,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912709482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:58,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:58,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:29:58,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461836261] [2021-06-05 21:29:58,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:29:58,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:58,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:29:58,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:58,573 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:59,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:59,102 INFO L93 Difference]: Finished difference Result 803 states and 2447 transitions. [2021-06-05 21:29:59,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:59,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:59,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:59,103 INFO L225 Difference]: With dead ends: 803 [2021-06-05 21:29:59,103 INFO L226 Difference]: Without dead ends: 798 [2021-06-05 21:29:59,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:29:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-06-05 21:29:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 705. [2021-06-05 21:29:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-05 21:29:59,111 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-05 21:29:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:59,111 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-05 21:29:59,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-05 21:29:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:59,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:59,112 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:59,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5650 [2021-06-05 21:29:59,312 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1457174155, now seen corresponding path program 145 times [2021-06-05 21:29:59,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:59,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398127542] [2021-06-05 21:29:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:59,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:59,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398127542] [2021-06-05 21:29:59,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398127542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:59,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490998241] [2021-06-05 21:29:59,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:59,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:29:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:59,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:59,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:59,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:00,124 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:00,124 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:00,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:00,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:00,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:00,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:00,278 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:00,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:00,279 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:00,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490998241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:00,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:00,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:30:00,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235530547] [2021-06-05 21:30:00,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:30:00,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:00,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:30:00,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:00,305 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:00,868 INFO L93 Difference]: Finished difference Result 813 states and 2474 transitions. [2021-06-05 21:30:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:00,869 INFO L225 Difference]: With dead ends: 813 [2021-06-05 21:30:00,869 INFO L226 Difference]: Without dead ends: 808 [2021-06-05 21:30:00,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:30:00,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-05 21:30:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 705. [2021-06-05 21:30:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-05 21:30:00,877 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-05 21:30:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:00,877 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-05 21:30:00,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-05 21:30:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:00,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:00,877 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:01,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5778,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:01,080 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash -646443817, now seen corresponding path program 146 times [2021-06-05 21:30:01,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:01,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967263029] [2021-06-05 21:30:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:01,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967263029] [2021-06-05 21:30:01,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967263029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479047206] [2021-06-05 21:30:01,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:01,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:01,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:01,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:01,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:01,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:01,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:01,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:01,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:01,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:30:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:01,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479047206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:01,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:01,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:30:01,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027746491] [2021-06-05 21:30:01,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:30:01,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:01,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:30:01,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:01,601 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:01,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:01,901 INFO L93 Difference]: Finished difference Result 751 states and 2311 transitions. [2021-06-05 21:30:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:30:01,902 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:01,903 INFO L225 Difference]: With dead ends: 751 [2021-06-05 21:30:01,903 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 21:30:01,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:30:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 21:30:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 705. [2021-06-05 21:30:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-06-05 21:30:01,910 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-06-05 21:30:01,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:01,910 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-06-05 21:30:01,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:01,910 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-06-05 21:30:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:01,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:01,911 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:02,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5939 [2021-06-05 21:30:02,112 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:02,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:02,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1571255993, now seen corresponding path program 147 times [2021-06-05 21:30:02,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:02,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344830405] [2021-06-05 21:30:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:02,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:02,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344830405] [2021-06-05 21:30:02,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344830405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:02,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878537495] [2021-06-05 21:30:02,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:02,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:30:02,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:02,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:02,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:02,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:02,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:02,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:02,751 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:02,752 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:02,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:03,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:03,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:03,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:03,178 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:03,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:03,178 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:03,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878537495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:03,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:03,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:30:03,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583864597] [2021-06-05 21:30:03,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:30:03,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:30:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:03,204 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:03,957 INFO L93 Difference]: Finished difference Result 846 states and 2546 transitions. [2021-06-05 21:30:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:30:03,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:03,959 INFO L225 Difference]: With dead ends: 846 [2021-06-05 21:30:03,959 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 21:30:03,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 737.3ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:30:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 21:30:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 705. [2021-06-05 21:30:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-06-05 21:30:03,966 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-06-05 21:30:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:03,966 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-06-05 21:30:03,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-06-05 21:30:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:03,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:03,967 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:04,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5997,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:04,168 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1456254125, now seen corresponding path program 148 times [2021-06-05 21:30:04,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:04,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675680410] [2021-06-05 21:30:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:04,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:04,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675680410] [2021-06-05 21:30:04,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675680410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:04,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331315707] [2021-06-05 21:30:04,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:04,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:04,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:04,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:04,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:04,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:04,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:04,918 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:04,918 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:04,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:05,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:05,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:05,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:05,143 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:05,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:05,143 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:05,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331315707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:05,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:05,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:30:05,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487900302] [2021-06-05 21:30:05,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:30:05,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:05,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:30:05,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:05,170 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:06,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:06,000 INFO L93 Difference]: Finished difference Result 871 states and 2573 transitions. [2021-06-05 21:30:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:30:06,001 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:06,002 INFO L225 Difference]: With dead ends: 871 [2021-06-05 21:30:06,002 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 21:30:06,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 794.3ms TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:30:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 21:30:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 706. [2021-06-05 21:30:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-06-05 21:30:06,010 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-06-05 21:30:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:06,010 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-06-05 21:30:06,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-06-05 21:30:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:06,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:06,011 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:06,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6137,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:06,212 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:06,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1093429135, now seen corresponding path program 149 times [2021-06-05 21:30:06,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:06,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418434530] [2021-06-05 21:30:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:06,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:06,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418434530] [2021-06-05 21:30:06,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418434530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:06,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189035701] [2021-06-05 21:30:06,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:06,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:30:06,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:06,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:06,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:06,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:06,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:06,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:06,840 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:06,840 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:06,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:07,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:07,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:07,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:07,098 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:07,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:07,099 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:07,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189035701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:07,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:07,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:30:07,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500946133] [2021-06-05 21:30:07,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:30:07,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:07,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:30:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:07,126 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:07,761 INFO L93 Difference]: Finished difference Result 805 states and 2457 transitions. [2021-06-05 21:30:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:07,762 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:07,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:07,763 INFO L225 Difference]: With dead ends: 805 [2021-06-05 21:30:07,763 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 21:30:07,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 634.9ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:30:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 21:30:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 706. [2021-06-05 21:30:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-06-05 21:30:07,770 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-06-05 21:30:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:07,770 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-06-05 21:30:07,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-06-05 21:30:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:07,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:07,771 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:07,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6299 [2021-06-05 21:30:07,974 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:07,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:07,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2050717319, now seen corresponding path program 150 times [2021-06-05 21:30:07,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:07,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666121433] [2021-06-05 21:30:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:08,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:08,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666121433] [2021-06-05 21:30:08,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666121433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:08,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22960280] [2021-06-05 21:30:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:08,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:30:08,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:08,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:08,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:08,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:08,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:08,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:08,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:30:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:08,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22960280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:08,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:08,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:30:08,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205902867] [2021-06-05 21:30:08,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:30:08,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:08,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:30:08,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:08,456 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:08,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:08,759 INFO L93 Difference]: Finished difference Result 817 states and 2547 transitions. [2021-06-05 21:30:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:08,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:08,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:08,761 INFO L225 Difference]: With dead ends: 817 [2021-06-05 21:30:08,761 INFO L226 Difference]: Without dead ends: 803 [2021-06-05 21:30:08,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-06-05 21:30:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 780. [2021-06-05 21:30:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.184852374839538) internal successors, (2481), 779 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2481 transitions. [2021-06-05 21:30:08,769 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2481 transitions. Word has length 18 [2021-06-05 21:30:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:08,769 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2481 transitions. [2021-06-05 21:30:08,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2481 transitions. [2021-06-05 21:30:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:08,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:08,770 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:08,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6402,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:08,971 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:08,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:08,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1500666617, now seen corresponding path program 151 times [2021-06-05 21:30:08,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:08,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889706238] [2021-06-05 21:30:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:09,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:09,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889706238] [2021-06-05 21:30:09,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889706238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:09,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015501781] [2021-06-05 21:30:09,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:09,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:09,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:09,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:09,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:09,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:09,748 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:09,748 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:09,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:09,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:09,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:09,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:09,908 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:09,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:09,909 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:09,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015501781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:09,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:09,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:30:09,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73628985] [2021-06-05 21:30:09,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:30:09,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:09,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:30:09,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:09,937 INFO L87 Difference]: Start difference. First operand 780 states and 2481 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:10,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:10,694 INFO L93 Difference]: Finished difference Result 881 states and 2702 transitions. [2021-06-05 21:30:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:30:10,695 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:10,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:10,696 INFO L225 Difference]: With dead ends: 881 [2021-06-05 21:30:10,696 INFO L226 Difference]: Without dead ends: 871 [2021-06-05 21:30:10,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:30:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-06-05 21:30:10,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 783. [2021-06-05 21:30:10,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.187979539641944) internal successors, (2493), 782 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2493 transitions. [2021-06-05 21:30:10,704 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2493 transitions. Word has length 18 [2021-06-05 21:30:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:10,704 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2493 transitions. [2021-06-05 21:30:10,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2493 transitions. [2021-06-05 21:30:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:10,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:10,705 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:10,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6446,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:10,906 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash -649522485, now seen corresponding path program 152 times [2021-06-05 21:30:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:10,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260379761] [2021-06-05 21:30:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:10,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:10,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260379761] [2021-06-05 21:30:10,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260379761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:10,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811152095] [2021-06-05 21:30:10,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:11,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:11,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:11,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:11,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:11,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:11,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:11,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:11,619 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:11,620 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:11,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:11,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:11,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:11,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:11,930 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:11,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:11,931 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:11,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811152095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:11,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:11,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:30:11,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716684431] [2021-06-05 21:30:11,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:30:11,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:11,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:30:11,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:11,957 INFO L87 Difference]: Start difference. First operand 783 states and 2493 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:12,669 INFO L93 Difference]: Finished difference Result 914 states and 2779 transitions. [2021-06-05 21:30:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:30:12,669 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:12,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:12,670 INFO L225 Difference]: With dead ends: 914 [2021-06-05 21:30:12,671 INFO L226 Difference]: Without dead ends: 904 [2021-06-05 21:30:12,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:30:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-05 21:30:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 808. [2021-06-05 21:30:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.195786864931846) internal successors, (2579), 807 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2579 transitions. [2021-06-05 21:30:12,679 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2579 transitions. Word has length 18 [2021-06-05 21:30:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:12,679 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2579 transitions. [2021-06-05 21:30:12,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2579 transitions. [2021-06-05 21:30:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:12,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:12,680 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:12,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6564 [2021-06-05 21:30:12,881 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:12,881 INFO L82 PathProgramCache]: Analyzing trace with hash -33858169, now seen corresponding path program 153 times [2021-06-05 21:30:12,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:12,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906764245] [2021-06-05 21:30:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:12,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:12,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906764245] [2021-06-05 21:30:12,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906764245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:12,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105357543] [2021-06-05 21:30:12,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:12,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:30:12,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:12,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:12,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:13,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:13,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:13,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:13,572 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:13,572 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:13,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:13,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:13,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:13,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:13,698 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:13,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:13,698 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:13,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105357543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:13,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:13,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:30:13,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424416025] [2021-06-05 21:30:13,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:30:13,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:30:13,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:13,724 INFO L87 Difference]: Start difference. First operand 808 states and 2579 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:14,443 INFO L93 Difference]: Finished difference Result 960 states and 2894 transitions. [2021-06-05 21:30:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:30:14,444 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:14,445 INFO L225 Difference]: With dead ends: 960 [2021-06-05 21:30:14,445 INFO L226 Difference]: Without dead ends: 950 [2021-06-05 21:30:14,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:30:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-05 21:30:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 829. [2021-06-05 21:30:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.1956521739130435) internal successors, (2646), 828 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2646 transitions. [2021-06-05 21:30:14,454 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2646 transitions. Word has length 18 [2021-06-05 21:30:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:14,454 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2646 transitions. [2021-06-05 21:30:14,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2646 transitions. [2021-06-05 21:30:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:14,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:14,455 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:14,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6715,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:14,657 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:14,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1871866443, now seen corresponding path program 154 times [2021-06-05 21:30:14,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:14,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330407710] [2021-06-05 21:30:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:14,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:14,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330407710] [2021-06-05 21:30:14,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330407710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:14,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396711660] [2021-06-05 21:30:14,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:14,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:14,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:14,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:15,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:15,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:15,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:15,288 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:15,288 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:15,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:15,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:15,588 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:15,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:15,603 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:15,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:15,604 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:15,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396711660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:15,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:15,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 21:30:15,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816625158] [2021-06-05 21:30:15,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:30:15,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:15,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:30:15,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:15,630 INFO L87 Difference]: Start difference. First operand 829 states and 2646 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:16,269 INFO L93 Difference]: Finished difference Result 966 states and 2916 transitions. [2021-06-05 21:30:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:30:16,269 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:16,270 INFO L225 Difference]: With dead ends: 966 [2021-06-05 21:30:16,270 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 21:30:16,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 600.5ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:30:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 21:30:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 835. [2021-06-05 21:30:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-05 21:30:16,279 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-05 21:30:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:16,279 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-05 21:30:16,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-05 21:30:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:16,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:16,280 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:16,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6814,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:16,481 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:16,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:16,481 INFO L82 PathProgramCache]: Analyzing trace with hash 819787271, now seen corresponding path program 155 times [2021-06-05 21:30:16,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:16,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614212496] [2021-06-05 21:30:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:16,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:16,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614212496] [2021-06-05 21:30:16,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614212496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:16,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618462785] [2021-06-05 21:30:16,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:16,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:30:16,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:16,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:16,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:16,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:17,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:17,197 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:17,197 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:17,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:17,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:17,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:17,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:17,346 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:17,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:17,347 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:17,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618462785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:17,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:17,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:30:17,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052959530] [2021-06-05 21:30:17,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:30:17,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:17,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:30:17,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:17,373 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:18,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:18,173 INFO L93 Difference]: Finished difference Result 1010 states and 3017 transitions. [2021-06-05 21:30:18,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:30:18,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:18,175 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 21:30:18,175 INFO L226 Difference]: Without dead ends: 995 [2021-06-05 21:30:18,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 777.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:30:18,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-06-05 21:30:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 835. [2021-06-05 21:30:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-05 21:30:18,184 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-05 21:30:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:18,184 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-05 21:30:18,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-05 21:30:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:18,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:18,185 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:18,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6954 [2021-06-05 21:30:18,385 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:18,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1729895989, now seen corresponding path program 156 times [2021-06-05 21:30:18,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:18,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921884326] [2021-06-05 21:30:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:18,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:18,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921884326] [2021-06-05 21:30:18,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921884326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:18,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059825860] [2021-06-05 21:30:18,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:18,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:30:18,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:18,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:18,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:19,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:19,304 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:19,304 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:19,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:19,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:19,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:19,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:19,468 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:19,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:19,469 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:19,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059825860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:19,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:19,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:30:19,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170211402] [2021-06-05 21:30:19,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:30:19,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:30:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:19,496 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:20,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:20,129 INFO L93 Difference]: Finished difference Result 964 states and 2957 transitions. [2021-06-05 21:30:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:30:20,129 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:20,130 INFO L225 Difference]: With dead ends: 964 [2021-06-05 21:30:20,130 INFO L226 Difference]: Without dead ends: 959 [2021-06-05 21:30:20,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 708.3ms TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:30:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-06-05 21:30:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 835. [2021-06-05 21:30:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-05 21:30:20,143 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-05 21:30:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:20,143 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-05 21:30:20,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-05 21:30:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:20,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:20,145 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:20,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7060,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:20,368 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash 834301575, now seen corresponding path program 157 times [2021-06-05 21:30:20,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:20,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202210315] [2021-06-05 21:30:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:20,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:20,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202210315] [2021-06-05 21:30:20,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202210315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:20,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291226205] [2021-06-05 21:30:20,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:30:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:20,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:20,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:30:20,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:21,037 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 21:30:21,038 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 21:30:21,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 21:30:21,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:30:21,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:30:21,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:21,284 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:30:21,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:21,285 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 21:30:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:21,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291226205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:21,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:21,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:30:21,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848555119] [2021-06-05 21:30:21,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:30:21,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:21,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:30:21,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:21,312 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:21,937 INFO L93 Difference]: Finished difference Result 980 states and 3003 transitions. [2021-06-05 21:30:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:30:21,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:21,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:21,939 INFO L225 Difference]: With dead ends: 980 [2021-06-05 21:30:21,939 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 21:30:21,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 690.7ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:30:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 21:30:21,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 837. [2021-06-05 21:30:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.187799043062201) internal successors, (2665), 836 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2665 transitions. [2021-06-05 21:30:21,948 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2665 transitions. Word has length 18 [2021-06-05 21:30:21,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:21,948 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2665 transitions. [2021-06-05 21:30:21,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2665 transitions. [2021-06-05 21:30:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:21,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:21,949 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:22,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7192,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:22,149 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1301661189, now seen corresponding path program 158 times [2021-06-05 21:30:22,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:22,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232008138] [2021-06-05 21:30:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:22,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:22,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232008138] [2021-06-05 21:30:22,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232008138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:22,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892928384] [2021-06-05 21:30:22,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:22,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:22,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:22,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:30:22,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:22,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:22,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:23,177 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2021-06-05 21:30:23,936 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 260 [2021-06-05 21:30:24,043 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 264 [2021-06-05 21:30:24,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:24,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:24,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:24,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:24,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892928384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:24,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:24,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:30:24,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396544196] [2021-06-05 21:30:24,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:30:24,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:30:24,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:24,394 INFO L87 Difference]: Start difference. First operand 837 states and 2665 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:24,698 INFO L93 Difference]: Finished difference Result 905 states and 2785 transitions. [2021-06-05 21:30:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:30:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:24,699 INFO L225 Difference]: With dead ends: 905 [2021-06-05 21:30:24,700 INFO L226 Difference]: Without dead ends: 883 [2021-06-05 21:30:24,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:30:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-05 21:30:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 840. [2021-06-05 21:30:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.1835518474374256) internal successors, (2671), 839 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2671 transitions. [2021-06-05 21:30:24,708 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2671 transitions. Word has length 19 [2021-06-05 21:30:24,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:24,709 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2671 transitions. [2021-06-05 21:30:24,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,709 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2671 transitions. [2021-06-05 21:30:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:24,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:24,710 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:24,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7314,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:24,910 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash -649128821, now seen corresponding path program 159 times [2021-06-05 21:30:24,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:24,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551843402] [2021-06-05 21:30:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:25,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:25,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551843402] [2021-06-05 21:30:25,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551843402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:25,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856997959] [2021-06-05 21:30:25,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:25,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:25,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:25,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 21:30:25,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:25,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:25,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:25,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:25,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:25,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:25,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:25,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856997959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:25,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:25,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:30:25,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447936869] [2021-06-05 21:30:25,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:30:25,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:25,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:30:25,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:25,872 INFO L87 Difference]: Start difference. First operand 840 states and 2671 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:26,316 INFO L93 Difference]: Finished difference Result 899 states and 2774 transitions. [2021-06-05 21:30:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:30:26,316 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:26,317 INFO L225 Difference]: With dead ends: 899 [2021-06-05 21:30:26,317 INFO L226 Difference]: Without dead ends: 880 [2021-06-05 21:30:26,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:30:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-06-05 21:30:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 842. [2021-06-05 21:30:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.1712247324613556) internal successors, (2667), 841 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2667 transitions. [2021-06-05 21:30:26,326 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2667 transitions. Word has length 19 [2021-06-05 21:30:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:26,326 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2667 transitions. [2021-06-05 21:30:26,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2667 transitions. [2021-06-05 21:30:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:26,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:26,327 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:26,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7594,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:26,528 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:26,528 INFO L82 PathProgramCache]: Analyzing trace with hash 203204603, now seen corresponding path program 160 times [2021-06-05 21:30:26,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:26,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666058170] [2021-06-05 21:30:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:26,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:26,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666058170] [2021-06-05 21:30:26,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666058170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:26,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263378451] [2021-06-05 21:30:26,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:26,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:26,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:26,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:30:26,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:27,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:27,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:27,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:27,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:27,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:27,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:27,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263378451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:27,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:27,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:30:27,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458615734] [2021-06-05 21:30:27,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:30:27,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:27,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:30:27,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:27,804 INFO L87 Difference]: Start difference. First operand 842 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:28,165 INFO L93 Difference]: Finished difference Result 889 states and 2752 transitions. [2021-06-05 21:30:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:30:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:28,166 INFO L225 Difference]: With dead ends: 889 [2021-06-05 21:30:28,166 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 21:30:28,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 456.1ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:30:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 21:30:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 843. [2021-06-05 21:30:28,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.16270783847981) internal successors, (2663), 842 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2663 transitions. [2021-06-05 21:30:28,175 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2663 transitions. Word has length 19 [2021-06-05 21:30:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:28,176 INFO L482 AbstractCegarLoop]: Abstraction has 843 states and 2663 transitions. [2021-06-05 21:30:28,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2663 transitions. [2021-06-05 21:30:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:28,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:28,177 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:28,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7704 [2021-06-05 21:30:28,377 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash 946787963, now seen corresponding path program 161 times [2021-06-05 21:30:28,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:28,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386951214] [2021-06-05 21:30:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:28,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:28,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386951214] [2021-06-05 21:30:28,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386951214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:28,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555725813] [2021-06-05 21:30:28,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:28,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:28,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:28,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:30:28,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:28,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:28,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:30:30,248 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 198 [2021-06-05 21:30:30,399 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 210 [2021-06-05 21:30:31,314 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 258 [2021-06-05 21:30:31,481 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 277 [2021-06-05 21:30:31,660 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 302 [2021-06-05 21:30:32,024 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 419 [2021-06-05 21:30:32,509 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 519 [2021-06-05 21:30:32,997 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 519 [2021-06-05 21:30:33,546 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 526 [2021-06-05 21:30:33,740 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 236 [2021-06-05 21:30:34,824 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 233 [2021-06-05 21:30:34,940 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 233 [2021-06-05 21:30:35,072 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 214 [2021-06-05 21:30:35,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:30:35,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:35,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:35,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:35,733 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:30:35,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:35,733 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:30:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:35,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555725813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:35,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:35,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:30:35,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476048376] [2021-06-05 21:30:35,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:30:35,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:35,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:30:35,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:35,767 INFO L87 Difference]: Start difference. First operand 843 states and 2663 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:36,206 INFO L93 Difference]: Finished difference Result 922 states and 2811 transitions. [2021-06-05 21:30:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:30:36,207 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:36,208 INFO L225 Difference]: With dead ends: 922 [2021-06-05 21:30:36,208 INFO L226 Difference]: Without dead ends: 910 [2021-06-05 21:30:36,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:30:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-05 21:30:36,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 839. [2021-06-05 21:30:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.1658711217183773) internal successors, (2653), 838 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2653 transitions. [2021-06-05 21:30:36,217 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2653 transitions. Word has length 19 [2021-06-05 21:30:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:36,217 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2653 transitions. [2021-06-05 21:30:36,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2653 transitions. [2021-06-05 21:30:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:36,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:36,218 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:36,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7885 [2021-06-05 21:30:36,419 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash 274927871, now seen corresponding path program 162 times [2021-06-05 21:30:36,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:36,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48432897] [2021-06-05 21:30:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:36,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:36,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48432897] [2021-06-05 21:30:36,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48432897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:36,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528415774] [2021-06-05 21:30:36,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:36,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:30:36,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:36,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:30:36,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:36,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:36,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:30:38,015 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 424 [2021-06-05 21:30:38,217 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 424 [2021-06-05 21:30:38,473 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 435 [2021-06-05 21:30:39,297 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 488 [2021-06-05 21:30:39,495 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 323 [2021-06-05 21:30:40,306 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 21:30:40,973 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 330 [2021-06-05 21:30:41,089 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 283 [2021-06-05 21:30:42,401 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 479 [2021-06-05 21:30:42,893 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 629 [2021-06-05 21:30:43,368 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 629 [2021-06-05 21:30:43,907 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 634 [2021-06-05 21:30:44,340 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 534 [2021-06-05 21:30:44,819 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 234 [2021-06-05 21:30:45,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:30:45,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:45,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:45,921 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:30:45,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:45,922 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:30:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:45,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528415774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:45,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:45,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:30:45,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077373040] [2021-06-05 21:30:45,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:30:45,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:30:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:30:45,951 INFO L87 Difference]: Start difference. First operand 839 states and 2653 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:46,482 INFO L93 Difference]: Finished difference Result 960 states and 2881 transitions. [2021-06-05 21:30:46,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:30:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:46,484 INFO L225 Difference]: With dead ends: 960 [2021-06-05 21:30:46,484 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 21:30:46,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 435.3ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:30:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 21:30:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 844. [2021-06-05 21:30:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1589561091340452) internal successors, (2663), 843 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2663 transitions. [2021-06-05 21:30:46,493 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2663 transitions. Word has length 19 [2021-06-05 21:30:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:46,493 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2663 transitions. [2021-06-05 21:30:46,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2663 transitions. [2021-06-05 21:30:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:46,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:46,494 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:46,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8577 [2021-06-05 21:30:46,695 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:46,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:46,695 INFO L82 PathProgramCache]: Analyzing trace with hash -386335912, now seen corresponding path program 163 times [2021-06-05 21:30:46,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:46,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931425186] [2021-06-05 21:30:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:46,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:46,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931425186] [2021-06-05 21:30:46,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931425186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:46,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349731222] [2021-06-05 21:30:46,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:46,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:46,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:46,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349731222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:46,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:46,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:46,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049640926] [2021-06-05 21:30:46,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:46,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:46,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:46,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:46,814 INFO L87 Difference]: Start difference. First operand 844 states and 2663 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:46,868 INFO L93 Difference]: Finished difference Result 1106 states and 3133 transitions. [2021-06-05 21:30:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:30:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:46,870 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 21:30:46,870 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 21:30:46,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 21:30:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 852. [2021-06-05 21:30:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1656874265569916) internal successors, (2694), 851 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2694 transitions. [2021-06-05 21:30:46,880 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2694 transitions. Word has length 19 [2021-06-05 21:30:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:46,880 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2694 transitions. [2021-06-05 21:30:46,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2694 transitions. [2021-06-05 21:30:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:46,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:46,885 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:47,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9440,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:47,105 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1288290309, now seen corresponding path program 164 times [2021-06-05 21:30:47,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:47,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382642763] [2021-06-05 21:30:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:47,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:47,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382642763] [2021-06-05 21:30:47,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382642763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:47,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305974450] [2021-06-05 21:30:47,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:47,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:47,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:47,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:30:47,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:47,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:47,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:47,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:47,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:47,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:47,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:47,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305974450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:47,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:47,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:30:47,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302914566] [2021-06-05 21:30:47,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:30:47,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:30:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:47,954 INFO L87 Difference]: Start difference. First operand 852 states and 2694 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:48,268 INFO L93 Difference]: Finished difference Result 911 states and 2818 transitions. [2021-06-05 21:30:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:30:48,268 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:48,270 INFO L225 Difference]: With dead ends: 911 [2021-06-05 21:30:48,270 INFO L226 Difference]: Without dead ends: 900 [2021-06-05 21:30:48,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:30:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-06-05 21:30:48,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 856. [2021-06-05 21:30:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.160233918128655) internal successors, (2702), 855 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2702 transitions. [2021-06-05 21:30:48,283 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2702 transitions. Word has length 19 [2021-06-05 21:30:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:48,283 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2702 transitions. [2021-06-05 21:30:48,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2702 transitions. [2021-06-05 21:30:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:48,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:48,284 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:48,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9441 [2021-06-05 21:30:48,508 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash -544706949, now seen corresponding path program 165 times [2021-06-05 21:30:48,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:48,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344084526] [2021-06-05 21:30:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:48,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:48,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344084526] [2021-06-05 21:30:48,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344084526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:48,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717221619] [2021-06-05 21:30:48,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:48,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:48,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:48,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:30:48,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:48,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:48,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:30:50,350 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 334 [2021-06-05 21:30:51,488 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 443 [2021-06-05 21:30:51,822 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 463 [2021-06-05 21:30:52,169 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 463 [2021-06-05 21:30:52,549 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 470 [2021-06-05 21:30:52,994 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 525 [2021-06-05 21:30:53,318 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 504 [2021-06-05 21:30:53,905 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 288 [2021-06-05 21:30:54,083 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 334 [2021-06-05 21:30:54,278 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 334 [2021-06-05 21:30:54,398 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 223 [2021-06-05 21:30:54,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:30:54,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:54,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:54,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:54,968 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:30:54,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:54,968 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:30:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:54,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717221619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:54,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:54,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:30:54,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638427837] [2021-06-05 21:30:54,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:30:54,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:54,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:30:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:54,998 INFO L87 Difference]: Start difference. First operand 856 states and 2702 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:55,454 INFO L93 Difference]: Finished difference Result 946 states and 2880 transitions. [2021-06-05 21:30:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:30:55,454 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:55,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:55,455 INFO L225 Difference]: With dead ends: 946 [2021-06-05 21:30:55,455 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 21:30:55,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:30:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 21:30:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 858. [2021-06-05 21:30:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.156359393232205) internal successors, (2705), 857 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2705 transitions. [2021-06-05 21:30:55,464 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2705 transitions. Word has length 19 [2021-06-05 21:30:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:55,465 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2705 transitions. [2021-06-05 21:30:55,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2705 transitions. [2021-06-05 21:30:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:55,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:55,466 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:55,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9533 [2021-06-05 21:30:55,666 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:55,666 INFO L82 PathProgramCache]: Analyzing trace with hash 306437183, now seen corresponding path program 166 times [2021-06-05 21:30:55,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:55,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786513970] [2021-06-05 21:30:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:55,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:55,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786513970] [2021-06-05 21:30:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786513970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:55,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412420163] [2021-06-05 21:30:55,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:55,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:55,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:55,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:30:55,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:56,207 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 21:30:56,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:56,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:30:57,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:30:57,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:57,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:58,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:58,913 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:30:58,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:30:58,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:30:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:58,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412420163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:58,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:58,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:30:58,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421182244] [2021-06-05 21:30:58,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:30:58,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:58,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:30:58,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:30:58,943 INFO L87 Difference]: Start difference. First operand 858 states and 2705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:59,536 INFO L93 Difference]: Finished difference Result 1017 states and 3020 transitions. [2021-06-05 21:30:59,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:30:59,536 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:59,538 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 21:30:59,538 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 21:30:59,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:30:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 21:30:59,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 867. [2021-06-05 21:30:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.147806004618938) internal successors, (2726), 866 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2726 transitions. [2021-06-05 21:30:59,548 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2726 transitions. Word has length 19 [2021-06-05 21:30:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:59,548 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2726 transitions. [2021-06-05 21:30:59,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2726 transitions. [2021-06-05 21:30:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:59,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:59,549 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:59,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10224 [2021-06-05 21:30:59,749 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash 922101499, now seen corresponding path program 167 times [2021-06-05 21:30:59,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:59,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087648483] [2021-06-05 21:30:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:59,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:59,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087648483] [2021-06-05 21:30:59,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087648483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:59,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624163135] [2021-06-05 21:30:59,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:59,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:59,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:59,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:30:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:00,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:00,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:00,836 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 323 [2021-06-05 21:31:00,946 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 333 [2021-06-05 21:31:01,053 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 333 [2021-06-05 21:31:01,184 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 344 [2021-06-05 21:31:01,342 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 379 [2021-06-05 21:31:01,472 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 336 [2021-06-05 21:31:02,588 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 323 [2021-06-05 21:31:02,746 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 323 [2021-06-05 21:31:02,880 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 277 [2021-06-05 21:31:03,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:03,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:03,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:03,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:03,922 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:03,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:03,922 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:03,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624163135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:03,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:03,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:31:03,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432559453] [2021-06-05 21:31:03,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:31:03,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:03,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:31:03,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:31:03,952 INFO L87 Difference]: Start difference. First operand 867 states and 2726 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:04,679 INFO L93 Difference]: Finished difference Result 1037 states and 3076 transitions. [2021-06-05 21:31:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:31:04,679 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:04,680 INFO L225 Difference]: With dead ends: 1037 [2021-06-05 21:31:04,680 INFO L226 Difference]: Without dead ends: 1021 [2021-06-05 21:31:04,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 610.0ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:31:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-05 21:31:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 884. [2021-06-05 21:31:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.1540203850509627) internal successors, (2785), 883 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2785 transitions. [2021-06-05 21:31:04,690 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2785 transitions. Word has length 19 [2021-06-05 21:31:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:04,691 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2785 transitions. [2021-06-05 21:31:04,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2785 transitions. [2021-06-05 21:31:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:04,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:04,692 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:04,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10615 [2021-06-05 21:31:04,892 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:04,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:04,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1879280894, now seen corresponding path program 168 times [2021-06-05 21:31:04,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:04,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773034800] [2021-06-05 21:31:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:04,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:04,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773034800] [2021-06-05 21:31:04,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773034800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:04,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181529161] [2021-06-05 21:31:04,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:04,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:31:04,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:04,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:31:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:04,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181529161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:04,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:04,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:31:04,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141880800] [2021-06-05 21:31:04,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:31:04,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:31:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:31:04,995 INFO L87 Difference]: Start difference. First operand 884 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:05,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:05,078 INFO L93 Difference]: Finished difference Result 1214 states and 3399 transitions. [2021-06-05 21:31:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:31:05,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:05,079 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 21:31:05,079 INFO L226 Difference]: Without dead ends: 1214 [2021-06-05 21:31:05,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:31:05,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-06-05 21:31:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 897. [2021-06-05 21:31:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.1595982142857144) internal successors, (2831), 896 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2831 transitions. [2021-06-05 21:31:05,089 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2831 transitions. Word has length 19 [2021-06-05 21:31:05,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:05,089 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2831 transitions. [2021-06-05 21:31:05,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2831 transitions. [2021-06-05 21:31:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:05,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:05,090 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:05,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11027 [2021-06-05 21:31:05,291 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:05,291 INFO L82 PathProgramCache]: Analyzing trace with hash -311501637, now seen corresponding path program 169 times [2021-06-05 21:31:05,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:05,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37376788] [2021-06-05 21:31:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:05,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:05,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37376788] [2021-06-05 21:31:05,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37376788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:05,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185820522] [2021-06-05 21:31:05,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:05,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:05,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:05,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:05,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:07,025 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 265 [2021-06-05 21:31:07,146 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 265 [2021-06-05 21:31:07,277 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 269 [2021-06-05 21:31:07,401 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 267 [2021-06-05 21:31:07,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:07,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:07,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:31:07,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:31:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:07,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185820522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:07,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:07,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:31:07,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21535021] [2021-06-05 21:31:07,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:31:07,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:07,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:31:07,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:31:07,581 INFO L87 Difference]: Start difference. First operand 897 states and 2831 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:07,987 INFO L93 Difference]: Finished difference Result 956 states and 2950 transitions. [2021-06-05 21:31:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:31:07,988 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:07,989 INFO L225 Difference]: With dead ends: 956 [2021-06-05 21:31:07,989 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 21:31:07,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:31:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 21:31:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 899. [2021-06-05 21:31:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-06-05 21:31:07,999 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-06-05 21:31:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:07,999 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-06-05 21:31:07,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-06-05 21:31:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:08,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:08,000 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:08,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11028 [2021-06-05 21:31:08,201 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:08,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:08,201 INFO L82 PathProgramCache]: Analyzing trace with hash 432081723, now seen corresponding path program 170 times [2021-06-05 21:31:08,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:08,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866830940] [2021-06-05 21:31:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:31:08,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:08,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866830940] [2021-06-05 21:31:08,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866830940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:08,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842865614] [2021-06-05 21:31:08,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:08,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:31:08,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:08,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:08,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:08,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:09,124 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 246 [2021-06-05 21:31:10,138 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 297 [2021-06-05 21:31:10,303 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 341 [2021-06-05 21:31:10,533 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 390 [2021-06-05 21:31:10,775 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 390 [2021-06-05 21:31:11,031 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 395 [2021-06-05 21:31:11,304 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 447 [2021-06-05 21:31:12,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:12,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:12,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:12,817 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:12,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:12,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:12,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842865614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:12,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:12,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:31:12,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277822216] [2021-06-05 21:31:12,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:31:12,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:12,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:31:12,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:31:12,848 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:13,267 INFO L93 Difference]: Finished difference Result 1019 states and 3082 transitions. [2021-06-05 21:31:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:31:13,267 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:13,268 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 21:31:13,269 INFO L226 Difference]: Without dead ends: 1009 [2021-06-05 21:31:13,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:31:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-05 21:31:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 899. [2021-06-05 21:31:13,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-06-05 21:31:13,278 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-06-05 21:31:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:13,278 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-06-05 21:31:13,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-06-05 21:31:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:13,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:13,280 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:13,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11323 [2021-06-05 21:31:13,480 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:13,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:13,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1283225855, now seen corresponding path program 171 times [2021-06-05 21:31:13,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:13,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004898619] [2021-06-05 21:31:13,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:13,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:13,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004898619] [2021-06-05 21:31:13,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004898619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:13,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416758713] [2021-06-05 21:31:13,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:13,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:31:13,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:13,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:13,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:13,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:14,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:15,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:15,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:15,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:15,501 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:15,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:15,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:15,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416758713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:15,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:15,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:31:15,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836523747] [2021-06-05 21:31:15,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:31:15,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:15,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:31:15,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:31:15,531 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:16,132 INFO L93 Difference]: Finished difference Result 1100 states and 3241 transitions. [2021-06-05 21:31:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:31:16,132 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:16,134 INFO L225 Difference]: With dead ends: 1100 [2021-06-05 21:31:16,134 INFO L226 Difference]: Without dead ends: 1081 [2021-06-05 21:31:16,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:31:16,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-05 21:31:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 899. [2021-06-05 21:31:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1447661469933186) internal successors, (2824), 898 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2824 transitions. [2021-06-05 21:31:16,145 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2824 transitions. Word has length 19 [2021-06-05 21:31:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:16,145 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2824 transitions. [2021-06-05 21:31:16,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2824 transitions. [2021-06-05 21:31:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:16,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:16,146 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:16,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11806,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:16,346 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:16,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1898890171, now seen corresponding path program 172 times [2021-06-05 21:31:16,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:16,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463003368] [2021-06-05 21:31:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:16,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:16,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463003368] [2021-06-05 21:31:16,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463003368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:16,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132778137] [2021-06-05 21:31:16,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:16,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:31:16,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:16,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:16,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:16,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:16,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:17,578 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 281 [2021-06-05 21:31:17,807 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 287 [2021-06-05 21:31:17,922 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 169 [2021-06-05 21:31:18,246 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 199 [2021-06-05 21:31:18,365 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 199 [2021-06-05 21:31:18,494 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 204 [2021-06-05 21:31:18,723 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 226 [2021-06-05 21:31:19,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:19,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:19,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:19,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:19,894 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:19,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:19,895 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:19,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132778137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:19,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:19,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:31:19,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882703341] [2021-06-05 21:31:19,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:31:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:31:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:31:19,924 INFO L87 Difference]: Start difference. First operand 899 states and 2824 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:20,684 INFO L93 Difference]: Finished difference Result 1077 states and 3204 transitions. [2021-06-05 21:31:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:31:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:20,686 INFO L225 Difference]: With dead ends: 1077 [2021-06-05 21:31:20,686 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 21:31:20,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 648.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:31:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 21:31:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 919. [2021-06-05 21:31:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-06-05 21:31:20,696 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-06-05 21:31:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:20,696 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-06-05 21:31:20,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-06-05 21:31:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:20,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:20,697 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:20,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12108 [2021-06-05 21:31:20,921 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:20,922 INFO L82 PathProgramCache]: Analyzing trace with hash -490352513, now seen corresponding path program 173 times [2021-06-05 21:31:20,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:20,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017957583] [2021-06-05 21:31:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:21,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:21,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017957583] [2021-06-05 21:31:21,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017957583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:21,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959634673] [2021-06-05 21:31:21,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:21,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:31:21,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:21,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:21,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:21,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:21,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:23,031 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 328 [2021-06-05 21:31:23,205 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 343 [2021-06-05 21:31:23,396 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 343 [2021-06-05 21:31:23,596 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 350 [2021-06-05 21:31:24,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:24,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:24,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:24,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:24,500 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:24,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:24,501 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:24,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959634673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:24,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:24,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:31:24,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127581376] [2021-06-05 21:31:24,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:31:24,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:24,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:31:24,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:31:24,531 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:25,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:25,229 INFO L93 Difference]: Finished difference Result 1009 states and 3050 transitions. [2021-06-05 21:31:25,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:31:25,230 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:25,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:25,231 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 21:31:25,231 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 21:31:25,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:31:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 21:31:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 919. [2021-06-05 21:31:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:25,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-06-05 21:31:25,243 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-06-05 21:31:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:25,243 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-06-05 21:31:25,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:25,243 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-06-05 21:31:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:25,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:25,245 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:25,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12492,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:25,449 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:25,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:25,449 INFO L82 PathProgramCache]: Analyzing trace with hash -901042152, now seen corresponding path program 174 times [2021-06-05 21:31:25,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:25,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561138768] [2021-06-05 21:31:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:25,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:25,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561138768] [2021-06-05 21:31:25,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561138768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:25,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562804587] [2021-06-05 21:31:25,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:25,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:31:25,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:25,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:31:25,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:25,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562804587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:25,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:25,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:31:25,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574976482] [2021-06-05 21:31:25,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:31:25,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:25,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:31:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:31:25,552 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:25,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:25,652 INFO L93 Difference]: Finished difference Result 1576 states and 4658 transitions. [2021-06-05 21:31:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:31:25,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:25,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:25,654 INFO L225 Difference]: With dead ends: 1576 [2021-06-05 21:31:25,654 INFO L226 Difference]: Without dead ends: 1576 [2021-06-05 21:31:25,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:31:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-05 21:31:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1265. [2021-06-05 21:31:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2207278481012658) internal successors, (4071), 1264 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4071 transitions. [2021-06-05 21:31:25,668 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4071 transitions. Word has length 19 [2021-06-05 21:31:25,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:25,668 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4071 transitions. [2021-06-05 21:31:25,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4071 transitions. [2021-06-05 21:31:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:25,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:25,670 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:25,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12939 [2021-06-05 21:31:25,870 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:25,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:25,870 INFO L82 PathProgramCache]: Analyzing trace with hash -95823877, now seen corresponding path program 175 times [2021-06-05 21:31:25,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:25,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118806001] [2021-06-05 21:31:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:25,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:25,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118806001] [2021-06-05 21:31:25,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118806001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:25,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808059772] [2021-06-05 21:31:25,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:26,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:26,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:26,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:26,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:26,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:26,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:31:26,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:31:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:26,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808059772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:26,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:26,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:31:26,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640194967] [2021-06-05 21:31:26,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:31:26,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:26,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:31:26,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:31:26,862 INFO L87 Difference]: Start difference. First operand 1265 states and 4071 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:27,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:27,387 INFO L93 Difference]: Finished difference Result 1300 states and 4138 transitions. [2021-06-05 21:31:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:31:27,387 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:27,389 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 21:31:27,389 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 21:31:27,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 411.0ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:31:27,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 21:31:27,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1265. [2021-06-05 21:31:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2056962025316458) internal successors, (4052), 1264 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4052 transitions. [2021-06-05 21:31:27,402 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4052 transitions. Word has length 19 [2021-06-05 21:31:27,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:27,403 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4052 transitions. [2021-06-05 21:31:27,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4052 transitions. [2021-06-05 21:31:27,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:27,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:27,404 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:27,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12940 [2021-06-05 21:31:27,604 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:27,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:27,605 INFO L82 PathProgramCache]: Analyzing trace with hash 647759483, now seen corresponding path program 176 times [2021-06-05 21:31:27,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:27,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417755798] [2021-06-05 21:31:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:31:27,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:27,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417755798] [2021-06-05 21:31:27,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417755798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:27,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548782883] [2021-06-05 21:31:27,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:27,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:31:27,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:27,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:27,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:28,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:28,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:29,205 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 244 [2021-06-05 21:31:29,323 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 244 [2021-06-05 21:31:29,468 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 249 [2021-06-05 21:31:30,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:30,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:30,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:30,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:30,639 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:30,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:30,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:30,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548782883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:30,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:30,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:31:30,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620329206] [2021-06-05 21:31:30,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:31:30,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:30,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:31:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:31:30,670 INFO L87 Difference]: Start difference. First operand 1265 states and 4052 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:31,117 INFO L93 Difference]: Finished difference Result 1377 states and 4307 transitions. [2021-06-05 21:31:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:31:31,117 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:31,119 INFO L225 Difference]: With dead ends: 1377 [2021-06-05 21:31:31,119 INFO L226 Difference]: Without dead ends: 1365 [2021-06-05 21:31:31,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:31:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-05 21:31:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1263. [2021-06-05 21:31:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 3.2044374009508716) internal successors, (4044), 1262 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4044 transitions. [2021-06-05 21:31:31,132 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4044 transitions. Word has length 19 [2021-06-05 21:31:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:31,132 INFO L482 AbstractCegarLoop]: Abstraction has 1263 states and 4044 transitions. [2021-06-05 21:31:31,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4044 transitions. [2021-06-05 21:31:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:31,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:31,133 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:31,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13055 [2021-06-05 21:31:31,337 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1498903615, now seen corresponding path program 177 times [2021-06-05 21:31:31,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:31,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89176358] [2021-06-05 21:31:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:31:31,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89176358] [2021-06-05 21:31:31,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89176358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794895769] [2021-06-05 21:31:31,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:31,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:31:31,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:31,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:31,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:31,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:31,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:32,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:32,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:32,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:33,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:33,805 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:33,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:33,806 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:33,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794895769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:33,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:33,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:31:33,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076649481] [2021-06-05 21:31:33,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:31:33,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:33,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:31:33,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:31:33,835 INFO L87 Difference]: Start difference. First operand 1263 states and 4044 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:34,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:34,408 INFO L93 Difference]: Finished difference Result 1437 states and 4435 transitions. [2021-06-05 21:31:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:31:34,408 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:34,410 INFO L225 Difference]: With dead ends: 1437 [2021-06-05 21:31:34,410 INFO L226 Difference]: Without dead ends: 1427 [2021-06-05 21:31:34,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 509.0ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:31:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-06-05 21:31:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1266. [2021-06-05 21:31:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.205533596837945) internal successors, (4055), 1265 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4055 transitions. [2021-06-05 21:31:34,423 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4055 transitions. Word has length 19 [2021-06-05 21:31:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:34,423 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4055 transitions. [2021-06-05 21:31:34,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4055 transitions. [2021-06-05 21:31:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:34,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:34,425 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:34,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13472,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:34,625 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:34,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2114567931, now seen corresponding path program 178 times [2021-06-05 21:31:34,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:34,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512660526] [2021-06-05 21:31:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:34,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:34,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512660526] [2021-06-05 21:31:34,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512660526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:34,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91908675] [2021-06-05 21:31:34,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:34,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:31:34,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:34,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:35,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:35,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:35,702 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 198 [2021-06-05 21:31:36,559 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 217 [2021-06-05 21:31:36,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:36,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:36,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:37,450 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 239 [2021-06-05 21:31:38,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:38,145 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:38,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:38,145 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:38,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91908675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:38,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:38,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:31:38,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200237623] [2021-06-05 21:31:38,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:31:38,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:38,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:31:38,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:31:38,174 INFO L87 Difference]: Start difference. First operand 1266 states and 4055 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:38,964 INFO L93 Difference]: Finished difference Result 1415 states and 4386 transitions. [2021-06-05 21:31:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:31:38,964 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:38,966 INFO L225 Difference]: With dead ends: 1415 [2021-06-05 21:31:38,966 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 21:31:38,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 675.9ms TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:31:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 21:31:38,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1283. [2021-06-05 21:31:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.207488299531981) internal successors, (4112), 1282 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4112 transitions. [2021-06-05 21:31:38,979 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4112 transitions. Word has length 19 [2021-06-05 21:31:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:38,980 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4112 transitions. [2021-06-05 21:31:38,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4112 transitions. [2021-06-05 21:31:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:38,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:38,981 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:39,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13775,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:39,182 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:39,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1223219970, now seen corresponding path program 179 times [2021-06-05 21:31:39,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:39,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123974906] [2021-06-05 21:31:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:39,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:39,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123974906] [2021-06-05 21:31:39,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123974906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:39,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385914424] [2021-06-05 21:31:39,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:39,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:31:39,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:31:39,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:39,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385914424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:39,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:39,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:31:39,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873162323] [2021-06-05 21:31:39,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:31:39,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:39,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:31:39,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:31:39,281 INFO L87 Difference]: Start difference. First operand 1283 states and 4112 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:39,351 INFO L93 Difference]: Finished difference Result 1610 states and 4775 transitions. [2021-06-05 21:31:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:31:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:39,353 INFO L225 Difference]: With dead ends: 1610 [2021-06-05 21:31:39,353 INFO L226 Difference]: Without dead ends: 1610 [2021-06-05 21:31:39,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:31:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-05 21:31:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1245. [2021-06-05 21:31:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-06-05 21:31:39,366 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-06-05 21:31:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:39,367 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-06-05 21:31:39,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-06-05 21:31:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:39,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:39,368 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:39,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14175,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:39,584 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:39,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:39,585 INFO L82 PathProgramCache]: Analyzing trace with hash -274674753, now seen corresponding path program 180 times [2021-06-05 21:31:39,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:39,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873014049] [2021-06-05 21:31:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:39,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:39,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873014049] [2021-06-05 21:31:39,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873014049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:39,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138058687] [2021-06-05 21:31:39,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:39,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:31:39,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:39,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:39,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:40,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:40,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:40,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:40,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:40,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:41,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:41,210 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:41,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:41,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:41,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138058687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:41,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:41,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:31:41,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235420117] [2021-06-05 21:31:41,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:31:41,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:41,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:31:41,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:31:41,240 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:41,836 INFO L93 Difference]: Finished difference Result 1317 states and 4106 transitions. [2021-06-05 21:31:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:31:41,837 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:41,838 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 21:31:41,838 INFO L226 Difference]: Without dead ends: 1307 [2021-06-05 21:31:41,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 639.4ms TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:31:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-05 21:31:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1245. [2021-06-05 21:31:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-06-05 21:31:41,854 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-06-05 21:31:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:41,854 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-06-05 21:31:41,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:41,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-06-05 21:31:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:41,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:41,856 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:42,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14176,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:42,078 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:42,078 INFO L82 PathProgramCache]: Analyzing trace with hash -685364392, now seen corresponding path program 181 times [2021-06-05 21:31:42,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:42,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40188521] [2021-06-05 21:31:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:42,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:42,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40188521] [2021-06-05 21:31:42,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40188521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:42,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557328681] [2021-06-05 21:31:42,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:42,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:31:42,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:42,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557328681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:42,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:42,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:31:42,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378867709] [2021-06-05 21:31:42,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:31:42,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:42,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:31:42,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:31:42,192 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:42,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:42,288 INFO L93 Difference]: Finished difference Result 2061 states and 6320 transitions. [2021-06-05 21:31:42,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:31:42,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:42,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:42,291 INFO L225 Difference]: With dead ends: 2061 [2021-06-05 21:31:42,291 INFO L226 Difference]: Without dead ends: 2061 [2021-06-05 21:31:42,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:31:42,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-05 21:31:42,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1804. [2021-06-05 21:31:42,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-06-05 21:31:42,312 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-06-05 21:31:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:42,312 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-06-05 21:31:42,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-06-05 21:31:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:42,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:42,314 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:42,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14384 [2021-06-05 21:31:42,515 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:42,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:42,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1326753925, now seen corresponding path program 182 times [2021-06-05 21:31:42,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:42,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517655864] [2021-06-05 21:31:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:42,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:42,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517655864] [2021-06-05 21:31:42,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517655864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:42,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403460771] [2021-06-05 21:31:42,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:42,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:31:42,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:42,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:42,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:43,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:43,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:43,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:43,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:43,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:44,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:44,788 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:44,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:44,789 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:44,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403460771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:44,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:44,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:31:44,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107905146] [2021-06-05 21:31:44,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:31:44,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:44,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:31:44,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:31:44,819 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:45,485 INFO L93 Difference]: Finished difference Result 1866 states and 5973 transitions. [2021-06-05 21:31:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:31:45,485 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:45,487 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 21:31:45,487 INFO L226 Difference]: Without dead ends: 1856 [2021-06-05 21:31:45,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 717.1ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:31:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-05 21:31:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1804. [2021-06-05 21:31:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-06-05 21:31:45,507 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-06-05 21:31:45,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:45,507 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-06-05 21:31:45,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-06-05 21:31:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:45,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:45,509 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:45,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14385,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:45,709 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1191710658, now seen corresponding path program 183 times [2021-06-05 21:31:45,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:45,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159767476] [2021-06-05 21:31:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:45,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159767476] [2021-06-05 21:31:45,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159767476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534933747] [2021-06-05 21:31:45,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:45,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:31:45,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:45,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:31:45,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:45,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534933747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:45,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:45,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:31:45,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574239458] [2021-06-05 21:31:45,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:31:45,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:45,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:31:45,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:31:45,818 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:45,954 INFO L93 Difference]: Finished difference Result 2380 states and 7376 transitions. [2021-06-05 21:31:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:31:45,954 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:45,956 INFO L225 Difference]: With dead ends: 2380 [2021-06-05 21:31:45,956 INFO L226 Difference]: Without dead ends: 2380 [2021-06-05 21:31:45,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:31:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-05 21:31:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2051. [2021-06-05 21:31:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.2712195121951217) internal successors, (6706), 2050 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6706 transitions. [2021-06-05 21:31:45,980 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6706 transitions. Word has length 19 [2021-06-05 21:31:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:45,980 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6706 transitions. [2021-06-05 21:31:45,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6706 transitions. [2021-06-05 21:31:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:45,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:45,982 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:46,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14698 [2021-06-05 21:31:46,182 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:46,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:46,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1038408603, now seen corresponding path program 184 times [2021-06-05 21:31:46,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:46,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115483973] [2021-06-05 21:31:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:31:46,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:46,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115483973] [2021-06-05 21:31:46,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115483973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:46,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781251968] [2021-06-05 21:31:46,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:46,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:31:46,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:46,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:46,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:46,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:46,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:47,543 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 240 [2021-06-05 21:31:47,648 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 244 [2021-06-05 21:31:47,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:47,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:47,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:31:47,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:31:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:47,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781251968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:47,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:47,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 21:31:47,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402179881] [2021-06-05 21:31:47,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:31:47,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:47,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:31:47,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:31:47,897 INFO L87 Difference]: Start difference. First operand 2051 states and 6706 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:48,167 INFO L93 Difference]: Finished difference Result 2076 states and 6747 transitions. [2021-06-05 21:31:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:31:48,167 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:48,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:48,169 INFO L225 Difference]: With dead ends: 2076 [2021-06-05 21:31:48,169 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 21:31:48,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:31:48,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 21:31:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2051. [2021-06-05 21:31:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.270243902439024) internal successors, (6704), 2050 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6704 transitions. [2021-06-05 21:31:48,195 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6704 transitions. Word has length 19 [2021-06-05 21:31:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:48,195 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6704 transitions. [2021-06-05 21:31:48,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:48,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6704 transitions. [2021-06-05 21:31:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:48,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:48,197 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:48,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14699 [2021-06-05 21:31:48,413 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash -186075179, now seen corresponding path program 185 times [2021-06-05 21:31:48,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:48,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430026689] [2021-06-05 21:31:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:31:48,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:48,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430026689] [2021-06-05 21:31:48,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430026689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:48,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187199092] [2021-06-05 21:31:48,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:48,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:31:48,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:48,527 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:48,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:48,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:49,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:49,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:49,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:31:49,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:31:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:49,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187199092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:49,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:49,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 21:31:49,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968913558] [2021-06-05 21:31:49,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:31:49,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:49,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:31:49,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:31:49,831 INFO L87 Difference]: Start difference. First operand 2051 states and 6704 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:50,101 INFO L93 Difference]: Finished difference Result 2076 states and 6752 transitions. [2021-06-05 21:31:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:31:50,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:50,103 INFO L225 Difference]: With dead ends: 2076 [2021-06-05 21:31:50,103 INFO L226 Difference]: Without dead ends: 2067 [2021-06-05 21:31:50,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:31:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-06-05 21:31:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2053. [2021-06-05 21:31:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 3.269980506822612) internal successors, (6710), 2052 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 6710 transitions. [2021-06-05 21:31:50,126 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 6710 transitions. Word has length 19 [2021-06-05 21:31:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:50,126 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 6710 transitions. [2021-06-05 21:31:50,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 6710 transitions. [2021-06-05 21:31:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:50,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:50,127 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:50,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14956,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:50,328 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:50,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:50,328 INFO L82 PathProgramCache]: Analyzing trace with hash 557508181, now seen corresponding path program 186 times [2021-06-05 21:31:50,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:50,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112738639] [2021-06-05 21:31:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:31:50,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:50,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112738639] [2021-06-05 21:31:50,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112738639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:50,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203362013] [2021-06-05 21:31:50,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:50,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:31:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:50,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:50,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:50,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:31:51,473 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 305 [2021-06-05 21:31:51,651 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 425 [2021-06-05 21:31:52,832 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 357 [2021-06-05 21:31:53,767 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 451 [2021-06-05 21:31:54,187 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 577 [2021-06-05 21:31:54,616 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 577 [2021-06-05 21:31:55,084 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 582 [2021-06-05 21:31:55,629 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 698 [2021-06-05 21:31:55,955 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 511 [2021-06-05 21:31:56,619 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 315 [2021-06-05 21:31:57,007 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 259 [2021-06-05 21:31:57,116 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 259 [2021-06-05 21:31:57,265 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 262 [2021-06-05 21:31:57,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:31:57,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:57,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:31:58,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:58,817 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:31:58,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:58,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:31:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:58,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203362013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:58,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:58,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 21:31:58,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654890558] [2021-06-05 21:31:58,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:31:58,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:58,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:31:58,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:31:58,847 INFO L87 Difference]: Start difference. First operand 2053 states and 6710 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:59,218 INFO L93 Difference]: Finished difference Result 2108 states and 6809 transitions. [2021-06-05 21:31:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:31:59,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:31:59,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:59,221 INFO L225 Difference]: With dead ends: 2108 [2021-06-05 21:31:59,221 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 21:31:59,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:31:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 21:31:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 2052. [2021-06-05 21:31:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.270112140419308) internal successors, (6707), 2051 states have internal predecessors, (6707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6707 transitions. [2021-06-05 21:31:59,243 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6707 transitions. Word has length 19 [2021-06-05 21:31:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:59,243 INFO L482 AbstractCegarLoop]: Abstraction has 2052 states and 6707 transitions. [2021-06-05 21:31:59,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6707 transitions. [2021-06-05 21:31:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:31:59,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:59,245 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:59,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15124,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:59,446 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:59,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:59,446 INFO L82 PathProgramCache]: Analyzing trace with hash -5033861, now seen corresponding path program 187 times [2021-06-05 21:31:59,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:59,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098873885] [2021-06-05 21:31:59,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:31:59,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:59,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098873885] [2021-06-05 21:31:59,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098873885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:59,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091932809] [2021-06-05 21:31:59,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:59,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:31:59,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:59,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:59,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:01,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:01,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:01,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:02,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:02,243 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:02,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:02,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:02,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091932809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:02,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:02,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:32:02,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268218376] [2021-06-05 21:32:02,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:32:02,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:02,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:32:02,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:32:02,271 INFO L87 Difference]: Start difference. First operand 2052 states and 6707 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:02,862 INFO L93 Difference]: Finished difference Result 2150 states and 6903 transitions. [2021-06-05 21:32:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:32:02,863 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:02,865 INFO L225 Difference]: With dead ends: 2150 [2021-06-05 21:32:02,865 INFO L226 Difference]: Without dead ends: 2140 [2021-06-05 21:32:02,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 539.8ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:32:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-06-05 21:32:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2066. [2021-06-05 21:32:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 3.2677966101694915) internal successors, (6748), 2065 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 6748 transitions. [2021-06-05 21:32:02,887 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 6748 transitions. Word has length 19 [2021-06-05 21:32:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:02,887 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 6748 transitions. [2021-06-05 21:32:02,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 6748 transitions. [2021-06-05 21:32:02,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:02,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:02,889 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:03,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16111 [2021-06-05 21:32:03,090 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:03,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1900690751, now seen corresponding path program 188 times [2021-06-05 21:32:03,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:03,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114890413] [2021-06-05 21:32:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:32:03,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:03,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114890413] [2021-06-05 21:32:03,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114890413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:03,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990762468] [2021-06-05 21:32:03,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:03,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:32:03,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:03,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:03,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:03,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:03,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:04,291 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 267 [2021-06-05 21:32:04,440 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 281 [2021-06-05 21:32:05,054 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 281 [2021-06-05 21:32:05,212 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 281 [2021-06-05 21:32:05,364 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 286 [2021-06-05 21:32:05,605 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 299 [2021-06-05 21:32:06,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:06,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:06,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:06,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:06,517 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:06,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:06,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:06,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990762468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:06,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:06,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:32:06,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688890390] [2021-06-05 21:32:06,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:32:06,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:32:06,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:32:06,545 INFO L87 Difference]: Start difference. First operand 2066 states and 6748 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:07,152 INFO L93 Difference]: Finished difference Result 2201 states and 7027 transitions. [2021-06-05 21:32:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:32:07,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:07,155 INFO L225 Difference]: With dead ends: 2201 [2021-06-05 21:32:07,155 INFO L226 Difference]: Without dead ends: 2171 [2021-06-05 21:32:07,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 627.9ms TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:32:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-06-05 21:32:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2055. [2021-06-05 21:32:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2658227848101267) internal successors, (6708), 2054 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6708 transitions. [2021-06-05 21:32:07,178 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6708 transitions. Word has length 19 [2021-06-05 21:32:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:07,178 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6708 transitions. [2021-06-05 21:32:07,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6708 transitions. [2021-06-05 21:32:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:07,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:07,180 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:07,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16439 [2021-06-05 21:32:07,381 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1478101077, now seen corresponding path program 189 times [2021-06-05 21:32:07,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:07,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496070202] [2021-06-05 21:32:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:07,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:07,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496070202] [2021-06-05 21:32:07,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496070202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:07,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883073936] [2021-06-05 21:32:07,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:07,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:32:07,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:07,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:07,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:07,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:07,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:09,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:09,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:09,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:10,400 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 231 [2021-06-05 21:32:10,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:10,549 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:10,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:10,550 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:10,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883073936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:10,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:10,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:32:10,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822644054] [2021-06-05 21:32:10,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:32:10,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:10,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:32:10,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:32:10,578 INFO L87 Difference]: Start difference. First operand 2055 states and 6708 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:11,170 INFO L93 Difference]: Finished difference Result 2182 states and 6988 transitions. [2021-06-05 21:32:11,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:32:11,170 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:11,172 INFO L225 Difference]: With dead ends: 2182 [2021-06-05 21:32:11,172 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 21:32:11,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 619.5ms TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:32:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 21:32:11,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2074. [2021-06-05 21:32:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 3.263868789194404) internal successors, (6766), 2073 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 6766 transitions. [2021-06-05 21:32:11,211 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 6766 transitions. Word has length 19 [2021-06-05 21:32:11,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:11,211 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 6766 transitions. [2021-06-05 21:32:11,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 6766 transitions. [2021-06-05 21:32:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:11,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:11,213 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:11,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16811,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:11,414 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash -911141607, now seen corresponding path program 190 times [2021-06-05 21:32:11,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:11,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558534437] [2021-06-05 21:32:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:11,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:11,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558534437] [2021-06-05 21:32:11,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558534437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:11,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623934239] [2021-06-05 21:32:11,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:11,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:32:11,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:11,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:11,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:11,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:13,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:13,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:13,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:13,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:13,963 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:13,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:13,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:13,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623934239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:13,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:13,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:32:13,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972347206] [2021-06-05 21:32:13,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:32:13,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:32:13,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:32:13,993 INFO L87 Difference]: Start difference. First operand 2074 states and 6766 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:14,688 INFO L93 Difference]: Finished difference Result 2241 states and 7161 transitions. [2021-06-05 21:32:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:32:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:14,690 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 21:32:14,691 INFO L226 Difference]: Without dead ends: 2215 [2021-06-05 21:32:14,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 680.7ms TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:32:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-06-05 21:32:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2055. [2021-06-05 21:32:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2633885102239533) internal successors, (6703), 2054 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6703 transitions. [2021-06-05 21:32:14,714 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6703 transitions. Word has length 19 [2021-06-05 21:32:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:14,715 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6703 transitions. [2021-06-05 21:32:14,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6703 transitions. [2021-06-05 21:32:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:14,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:14,716 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:14,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17226,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:14,917 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:14,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1963220779, now seen corresponding path program 191 times [2021-06-05 21:32:14,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:14,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332952538] [2021-06-05 21:32:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:15,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:15,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332952538] [2021-06-05 21:32:15,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332952538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:15,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305227601] [2021-06-05 21:32:15,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:15,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:32:15,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:15,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:15,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:15,389 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 21:32:15,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:15,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:16,911 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 279 [2021-06-05 21:32:17,035 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 279 [2021-06-05 21:32:17,246 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 267 [2021-06-05 21:32:17,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:17,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:17,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:18,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:18,151 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:18,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:18,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:18,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305227601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:18,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:18,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:32:18,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258131912] [2021-06-05 21:32:18,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:32:18,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:18,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:32:18,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:32:18,180 INFO L87 Difference]: Start difference. First operand 2055 states and 6703 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:18,816 INFO L93 Difference]: Finished difference Result 2116 states and 6803 transitions. [2021-06-05 21:32:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:32:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:18,818 INFO L225 Difference]: With dead ends: 2116 [2021-06-05 21:32:18,818 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 21:32:18,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 719.2ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:32:18,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 21:32:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2055. [2021-06-05 21:32:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2633885102239533) internal successors, (6703), 2054 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6703 transitions. [2021-06-05 21:32:18,843 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6703 transitions. Word has length 19 [2021-06-05 21:32:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:18,843 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6703 transitions. [2021-06-05 21:32:18,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6703 transitions. [2021-06-05 21:32:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:18,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:18,845 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:19,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17573 [2021-06-05 21:32:19,045 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:19,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1999747909, now seen corresponding path program 192 times [2021-06-05 21:32:19,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:19,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773731998] [2021-06-05 21:32:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:19,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773731998] [2021-06-05 21:32:19,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773731998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552263696] [2021-06-05 21:32:19,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:19,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:32:19,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:19,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:19,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:19,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:19,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:20,152 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 297 [2021-06-05 21:32:21,173 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 281 [2021-06-05 21:32:21,302 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 281 [2021-06-05 21:32:21,446 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 285 [2021-06-05 21:32:21,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:21,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:21,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:32:21,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:32:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:21,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552263696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:21,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:21,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:32:21,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702922589] [2021-06-05 21:32:21,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:32:21,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:21,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:32:21,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:32:21,639 INFO L87 Difference]: Start difference. First operand 2055 states and 6703 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:22,061 INFO L93 Difference]: Finished difference Result 2086 states and 6761 transitions. [2021-06-05 21:32:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:32:22,062 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:22,064 INFO L225 Difference]: With dead ends: 2086 [2021-06-05 21:32:22,064 INFO L226 Difference]: Without dead ends: 2075 [2021-06-05 21:32:22,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 453.5ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:32:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-06-05 21:32:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2055. [2021-06-05 21:32:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2599805258033108) internal successors, (6696), 2054 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6696 transitions. [2021-06-05 21:32:22,087 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6696 transitions. Word has length 19 [2021-06-05 21:32:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:22,087 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6696 transitions. [2021-06-05 21:32:22,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6696 transitions. [2021-06-05 21:32:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:22,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:22,089 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:22,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17916,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:22,289 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:22,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:22,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1256164549, now seen corresponding path program 193 times [2021-06-05 21:32:22,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:22,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170455085] [2021-06-05 21:32:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:32:22,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:22,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170455085] [2021-06-05 21:32:22,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170455085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:22,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110174434] [2021-06-05 21:32:22,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:22,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:22,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:22,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:23,511 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 232 [2021-06-05 21:32:24,938 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 283 [2021-06-05 21:32:25,182 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 290 [2021-06-05 21:32:25,498 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 397 [2021-06-05 21:32:25,796 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 397 [2021-06-05 21:32:26,151 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 404 [2021-06-05 21:32:26,461 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 402 [2021-06-05 21:32:27,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:27,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:27,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:28,486 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 136 [2021-06-05 21:32:28,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:28,683 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:28,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:28,684 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:28,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110174434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:28,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:28,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:32:28,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128332819] [2021-06-05 21:32:28,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:32:28,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:28,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:32:28,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:32:28,714 INFO L87 Difference]: Start difference. First operand 2055 states and 6696 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:29,429 INFO L93 Difference]: Finished difference Result 2182 states and 7001 transitions. [2021-06-05 21:32:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:32:29,429 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:29,432 INFO L225 Difference]: With dead ends: 2182 [2021-06-05 21:32:29,432 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 21:32:29,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 492.0ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:32:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 21:32:29,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2055. [2021-06-05 21:32:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2599805258033108) internal successors, (6696), 2054 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6696 transitions. [2021-06-05 21:32:29,454 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6696 transitions. Word has length 19 [2021-06-05 21:32:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:29,455 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6696 transitions. [2021-06-05 21:32:29,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6696 transitions. [2021-06-05 21:32:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:29,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:29,456 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:29,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18314 [2021-06-05 21:32:29,657 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:29,657 INFO L82 PathProgramCache]: Analyzing trace with hash -405020417, now seen corresponding path program 194 times [2021-06-05 21:32:29,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:29,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933877441] [2021-06-05 21:32:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:29,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:29,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933877441] [2021-06-05 21:32:29,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933877441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:29,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26039433] [2021-06-05 21:32:29,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:29,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:32:29,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:29,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:30,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:30,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:31,346 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 220 [2021-06-05 21:32:31,449 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 220 [2021-06-05 21:32:31,566 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 225 [2021-06-05 21:32:31,689 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 237 [2021-06-05 21:32:31,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:31,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:31,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:32,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:32,350 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:32,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:32,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:32,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26039433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:32,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:32,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:32:32,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989880031] [2021-06-05 21:32:32,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:32:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:32:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:32:32,380 INFO L87 Difference]: Start difference. First operand 2055 states and 6696 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:33,223 INFO L93 Difference]: Finished difference Result 2292 states and 7285 transitions. [2021-06-05 21:32:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:32:33,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:33,226 INFO L225 Difference]: With dead ends: 2292 [2021-06-05 21:32:33,226 INFO L226 Difference]: Without dead ends: 2280 [2021-06-05 21:32:33,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 597.5ms TimeCoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:32:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-05 21:32:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2076. [2021-06-05 21:32:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 3.261686746987952) internal successors, (6768), 2075 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6768 transitions. [2021-06-05 21:32:33,250 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6768 transitions. Word has length 19 [2021-06-05 21:32:33,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:33,250 INFO L482 AbstractCegarLoop]: Abstraction has 2076 states and 6768 transitions. [2021-06-05 21:32:33,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:33,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6768 transitions. [2021-06-05 21:32:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:33,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:33,251 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:33,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18885,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:33,452 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:33,452 INFO L82 PathProgramCache]: Analyzing trace with hash 210643899, now seen corresponding path program 195 times [2021-06-05 21:32:33,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:33,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892953545] [2021-06-05 21:32:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:33,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:33,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892953545] [2021-06-05 21:32:33,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892953545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:33,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895142118] [2021-06-05 21:32:33,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:33,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:32:33,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:33,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:33,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:33,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:34,401 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 213 [2021-06-05 21:32:35,280 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 265 [2021-06-05 21:32:37,295 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 257 [2021-06-05 21:32:37,485 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 389 [2021-06-05 21:32:37,675 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 389 [2021-06-05 21:32:37,915 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 848 DAG size of output: 392 [2021-06-05 21:32:38,187 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 517 [2021-06-05 21:32:38,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:38,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:38,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:39,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:39,090 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:39,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:39,090 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:39,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895142118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:39,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:39,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:32:39,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369010511] [2021-06-05 21:32:39,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:32:39,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:39,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:32:39,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:32:39,120 INFO L87 Difference]: Start difference. First operand 2076 states and 6768 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:40,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:40,259 INFO L93 Difference]: Finished difference Result 2278 states and 7226 transitions. [2021-06-05 21:32:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:32:40,260 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:40,262 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 21:32:40,262 INFO L226 Difference]: Without dead ends: 2266 [2021-06-05 21:32:40,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=321, Invalid=2229, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:32:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-05 21:32:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2093. [2021-06-05 21:32:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2092 states have (on average 3.2633843212237093) internal successors, (6827), 2092 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 6827 transitions. [2021-06-05 21:32:40,286 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 6827 transitions. Word has length 19 [2021-06-05 21:32:40,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:40,286 INFO L482 AbstractCegarLoop]: Abstraction has 2093 states and 6827 transitions. [2021-06-05 21:32:40,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 6827 transitions. [2021-06-05 21:32:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:40,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:40,288 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:40,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19223 [2021-06-05 21:32:40,489 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2116368511, now seen corresponding path program 196 times [2021-06-05 21:32:40,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:40,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972702852] [2021-06-05 21:32:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:40,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:40,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972702852] [2021-06-05 21:32:40,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972702852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:40,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708641875] [2021-06-05 21:32:40,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:40,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:32:40,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:40,638 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:40,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:40,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:42,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:42,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:42,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:42,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:42,465 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:42,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:42,465 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:42,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708641875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:42,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:42,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:32:42,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950185278] [2021-06-05 21:32:42,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:32:42,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:42,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:32:42,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:32:42,495 INFO L87 Difference]: Start difference. First operand 2093 states and 6827 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:43,581 INFO L93 Difference]: Finished difference Result 2437 states and 7752 transitions. [2021-06-05 21:32:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:32:43,581 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:43,584 INFO L225 Difference]: With dead ends: 2437 [2021-06-05 21:32:43,584 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 21:32:43,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:32:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 21:32:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2022. [2021-06-05 21:32:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 3.2300841167738743) internal successors, (6528), 2021 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 6528 transitions. [2021-06-05 21:32:43,607 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 6528 transitions. Word has length 19 [2021-06-05 21:32:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:43,607 INFO L482 AbstractCegarLoop]: Abstraction has 2022 states and 6528 transitions. [2021-06-05 21:32:43,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 6528 transitions. [2021-06-05 21:32:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:43,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:43,609 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:43,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19814,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:43,810 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:43,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1705678872, now seen corresponding path program 197 times [2021-06-05 21:32:43,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:43,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720404934] [2021-06-05 21:32:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:43,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:43,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720404934] [2021-06-05 21:32:43,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720404934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:43,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044870532] [2021-06-05 21:32:43,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:43,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:32:43,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:43,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:32:43,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:43,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044870532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:43,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:43,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:32:43,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817078796] [2021-06-05 21:32:43,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:32:43,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:32:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:32:43,952 INFO L87 Difference]: Start difference. First operand 2022 states and 6528 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:44,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:44,043 INFO L93 Difference]: Finished difference Result 2332 states and 7081 transitions. [2021-06-05 21:32:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:32:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:44,046 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 21:32:44,046 INFO L226 Difference]: Without dead ends: 2332 [2021-06-05 21:32:44,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:32:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-05 21:32:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1261. [2021-06-05 21:32:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.1634920634920634) internal successors, (3986), 1260 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3986 transitions. [2021-06-05 21:32:44,062 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3986 transitions. Word has length 19 [2021-06-05 21:32:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:44,062 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 3986 transitions. [2021-06-05 21:32:44,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3986 transitions. [2021-06-05 21:32:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:44,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:44,063 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:44,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20067 [2021-06-05 21:32:44,264 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:44,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1064289339, now seen corresponding path program 198 times [2021-06-05 21:32:44,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:44,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855477055] [2021-06-05 21:32:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:44,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:44,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855477055] [2021-06-05 21:32:44,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855477055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:44,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562704015] [2021-06-05 21:32:44,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:44,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:32:44,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:44,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:44,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:44,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:44,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:45,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:45,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:45,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:46,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:46,169 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:46,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:46,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:46,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562704015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:46,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:46,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:32:46,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62663358] [2021-06-05 21:32:46,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:32:46,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:46,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:32:46,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:32:46,199 INFO L87 Difference]: Start difference. First operand 1261 states and 3986 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:46,967 INFO L93 Difference]: Finished difference Result 1351 states and 4144 transitions. [2021-06-05 21:32:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:32:46,967 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:46,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:46,969 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 21:32:46,969 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 21:32:46,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 803.8ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:32:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 21:32:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1261. [2021-06-05 21:32:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.1634920634920634) internal successors, (3986), 1260 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3986 transitions. [2021-06-05 21:32:46,982 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3986 transitions. Word has length 19 [2021-06-05 21:32:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:46,982 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 3986 transitions. [2021-06-05 21:32:46,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3986 transitions. [2021-06-05 21:32:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:46,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:46,983 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:47,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20068 [2021-06-05 21:32:47,184 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:47,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1199332606, now seen corresponding path program 199 times [2021-06-05 21:32:47,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:47,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192435324] [2021-06-05 21:32:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:47,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192435324] [2021-06-05 21:32:47,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192435324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56873447] [2021-06-05 21:32:47,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:47,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:32:47,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:47,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56873447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:47,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:47,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:32:47,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473172526] [2021-06-05 21:32:47,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:32:47,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:47,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:32:47,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:32:47,289 INFO L87 Difference]: Start difference. First operand 1261 states and 3986 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:47,413 INFO L93 Difference]: Finished difference Result 1892 states and 5707 transitions. [2021-06-05 21:32:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:32:47,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:47,415 INFO L225 Difference]: With dead ends: 1892 [2021-06-05 21:32:47,415 INFO L226 Difference]: Without dead ends: 1892 [2021-06-05 21:32:47,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:32:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-06-05 21:32:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1496. [2021-06-05 21:32:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.181939799331104) internal successors, (4757), 1495 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 4757 transitions. [2021-06-05 21:32:47,432 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 4757 transitions. Word has length 19 [2021-06-05 21:32:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:47,432 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 4757 transitions. [2021-06-05 21:32:47,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 4757 transitions. [2021-06-05 21:32:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:47,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:47,434 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:47,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20335 [2021-06-05 21:32:47,634 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1485393921, now seen corresponding path program 200 times [2021-06-05 21:32:47,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:47,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936361985] [2021-06-05 21:32:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:47,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:47,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936361985] [2021-06-05 21:32:47,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936361985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:47,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104906128] [2021-06-05 21:32:47,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:47,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:32:47,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:47,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:47,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:48,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:48,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:49,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:49,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:49,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:49,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:49,666 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:49,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:49,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:49,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104906128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:49,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:49,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:32:49,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529826784] [2021-06-05 21:32:49,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:32:49,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:49,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:32:49,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:32:49,697 INFO L87 Difference]: Start difference. First operand 1496 states and 4757 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:50,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:50,470 INFO L93 Difference]: Finished difference Result 1563 states and 4870 transitions. [2021-06-05 21:32:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:32:50,471 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:50,473 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 21:32:50,473 INFO L226 Difference]: Without dead ends: 1553 [2021-06-05 21:32:50,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:32:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-06-05 21:32:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1496. [2021-06-05 21:32:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.181939799331104) internal successors, (4757), 1495 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 4757 transitions. [2021-06-05 21:32:50,489 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 4757 transitions. Word has length 19 [2021-06-05 21:32:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:50,489 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 4757 transitions. [2021-06-05 21:32:50,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 4757 transitions. [2021-06-05 21:32:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:50,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:50,491 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:50,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20336 [2021-06-05 21:32:50,711 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:50,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:50,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1612499752, now seen corresponding path program 201 times [2021-06-05 21:32:50,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:50,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311443208] [2021-06-05 21:32:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:50,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311443208] [2021-06-05 21:32:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311443208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452582176] [2021-06-05 21:32:50,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:50,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:32:50,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:50,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:32:50,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:50,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452582176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:50,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:50,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:32:50,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932378053] [2021-06-05 21:32:50,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:32:50,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:50,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:32:50,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:32:50,840 INFO L87 Difference]: Start difference. First operand 1496 states and 4757 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:51,072 INFO L93 Difference]: Finished difference Result 1980 states and 5974 transitions. [2021-06-05 21:32:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:32:51,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:51,075 INFO L225 Difference]: With dead ends: 1980 [2021-06-05 21:32:51,075 INFO L226 Difference]: Without dead ends: 1980 [2021-06-05 21:32:51,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:32:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-06-05 21:32:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1650. [2021-06-05 21:32:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.187386294724075) internal successors, (5256), 1649 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5256 transitions. [2021-06-05 21:32:51,101 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5256 transitions. Word has length 19 [2021-06-05 21:32:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:51,101 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5256 transitions. [2021-06-05 21:32:51,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5256 transitions. [2021-06-05 21:32:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:51,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:51,103 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:51,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20582 [2021-06-05 21:32:51,324 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:51,324 INFO L82 PathProgramCache]: Analyzing trace with hash 705955403, now seen corresponding path program 202 times [2021-06-05 21:32:51,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:51,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803214636] [2021-06-05 21:32:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:32:51,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:51,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803214636] [2021-06-05 21:32:51,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803214636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:51,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112383709] [2021-06-05 21:32:51,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:51,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:32:51,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:51,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:51,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:51,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:51,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:52,475 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 207 [2021-06-05 21:32:52,666 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 213 [2021-06-05 21:32:52,783 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 167 [2021-06-05 21:32:53,744 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 213 [2021-06-05 21:32:53,880 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 233 [2021-06-05 21:32:54,015 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 233 [2021-06-05 21:32:54,197 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 237 [2021-06-05 21:32:54,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:54,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:54,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:32:54,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:32:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:54,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112383709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:54,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:54,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:32:54,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849879081] [2021-06-05 21:32:54,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:32:54,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:32:54,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:32:54,434 INFO L87 Difference]: Start difference. First operand 1650 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:54,755 INFO L93 Difference]: Finished difference Result 1674 states and 5294 transitions. [2021-06-05 21:32:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:32:54,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:54,757 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 21:32:54,757 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 21:32:54,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:32:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 21:32:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1650. [2021-06-05 21:32:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.1861734384475437) internal successors, (5254), 1649 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5254 transitions. [2021-06-05 21:32:54,780 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5254 transitions. Word has length 19 [2021-06-05 21:32:54,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:54,780 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5254 transitions. [2021-06-05 21:32:54,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5254 transitions. [2021-06-05 21:32:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:54,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:54,781 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:54,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20583,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:54,998 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:54,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:54,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1558288827, now seen corresponding path program 203 times [2021-06-05 21:32:54,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:54,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669373210] [2021-06-05 21:32:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:32:55,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:55,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669373210] [2021-06-05 21:32:55,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669373210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:55,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891270123] [2021-06-05 21:32:55,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:55,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:32:55,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:55,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:55,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:55,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:55,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:55,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:55,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:55,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:32:55,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:32:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891270123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:55,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:55,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:32:55,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196219417] [2021-06-05 21:32:55,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:32:55,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:32:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:32:55,794 INFO L87 Difference]: Start difference. First operand 1650 states and 5254 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:56,105 INFO L93 Difference]: Finished difference Result 1675 states and 5302 transitions. [2021-06-05 21:32:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:32:56,105 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:32:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:56,107 INFO L225 Difference]: With dead ends: 1675 [2021-06-05 21:32:56,107 INFO L226 Difference]: Without dead ends: 1666 [2021-06-05 21:32:56,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:32:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-06-05 21:32:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1652. [2021-06-05 21:32:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 3.1859479103573594) internal successors, (5260), 1651 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 5260 transitions. [2021-06-05 21:32:56,124 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 5260 transitions. Word has length 19 [2021-06-05 21:32:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:56,124 INFO L482 AbstractCegarLoop]: Abstraction has 1652 states and 5260 transitions. [2021-06-05 21:32:56,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 5260 transitions. [2021-06-05 21:32:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:32:56,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:56,126 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:56,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20834,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:56,326 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:56,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1993095109, now seen corresponding path program 204 times [2021-06-05 21:32:56,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:56,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542777638] [2021-06-05 21:32:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:32:56,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:56,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542777638] [2021-06-05 21:32:56,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542777638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:56,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166435825] [2021-06-05 21:32:56,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:56,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:32:56,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:56,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:32:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:56,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:56,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:32:58,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:32:58,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:58,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:32:59,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:59,573 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:32:59,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:59,573 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:32:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:59,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166435825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:59,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:59,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:32:59,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531433852] [2021-06-05 21:32:59,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:32:59,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:59,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:32:59,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:32:59,603 INFO L87 Difference]: Start difference. First operand 1652 states and 5260 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:00,027 INFO L93 Difference]: Finished difference Result 1724 states and 5414 transitions. [2021-06-05 21:33:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:33:00,027 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:00,029 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 21:33:00,029 INFO L226 Difference]: Without dead ends: 1714 [2021-06-05 21:33:00,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:33:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-05 21:33:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1651. [2021-06-05 21:33:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 21:33:00,047 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 21:33:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:00,047 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 21:33:00,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 21:33:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:00,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:00,049 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:00,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20930,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:00,249 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:00,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:00,249 INFO L82 PathProgramCache]: Analyzing trace with hash -218856773, now seen corresponding path program 205 times [2021-06-05 21:33:00,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:00,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604225582] [2021-06-05 21:33:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:00,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604225582] [2021-06-05 21:33:00,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604225582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396403808] [2021-06-05 21:33:00,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:00,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:00,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:00,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:00,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:33:02,145 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 238 [2021-06-05 21:33:02,304 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 321 [2021-06-05 21:33:03,464 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 319 [2021-06-05 21:33:03,605 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 319 [2021-06-05 21:33:03,768 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 321 [2021-06-05 21:33:04,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:33:04,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:04,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:05,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:05,169 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:33:05,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:05,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:33:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:05,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396403808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:05,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:05,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:33:05,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914039731] [2021-06-05 21:33:05,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:33:05,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:33:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:33:05,199 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:05,906 INFO L93 Difference]: Finished difference Result 1757 states and 5501 transitions. [2021-06-05 21:33:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:33:05,906 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:05,908 INFO L225 Difference]: With dead ends: 1757 [2021-06-05 21:33:05,908 INFO L226 Difference]: Without dead ends: 1747 [2021-06-05 21:33:05,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 740.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:33:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-06-05 21:33:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1651. [2021-06-05 21:33:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 21:33:05,926 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 21:33:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:05,926 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 21:33:05,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 21:33:05,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:05,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:05,928 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:06,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21384,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:06,129 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1486313951, now seen corresponding path program 206 times [2021-06-05 21:33:06,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:06,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788109110] [2021-06-05 21:33:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:06,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:06,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788109110] [2021-06-05 21:33:06,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788109110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:06,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614654565] [2021-06-05 21:33:06,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:06,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:33:06,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:06,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:06,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:06,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:33:07,342 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 257 [2021-06-05 21:33:07,917 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 328 [2021-06-05 21:33:08,095 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 328 [2021-06-05 21:33:08,300 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 335 [2021-06-05 21:33:08,579 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 392 [2021-06-05 21:33:09,342 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 149 [2021-06-05 21:33:09,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:33:09,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:09,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:09,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:09,860 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:33:09,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:09,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:33:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:09,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614654565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:09,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:09,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:33:09,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65443294] [2021-06-05 21:33:09,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:33:09,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:09,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:33:09,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:33:09,889 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:10,654 INFO L93 Difference]: Finished difference Result 1826 states and 5698 transitions. [2021-06-05 21:33:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:33:10,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:10,656 INFO L225 Difference]: With dead ends: 1826 [2021-06-05 21:33:10,656 INFO L226 Difference]: Without dead ends: 1816 [2021-06-05 21:33:10,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 821.5ms TimeCoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:33:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-06-05 21:33:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1651. [2021-06-05 21:33:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 21:33:10,674 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 21:33:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:10,674 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 21:33:10,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 21:33:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:10,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:10,676 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:10,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21887,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:10,877 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:10,877 INFO L82 PathProgramCache]: Analyzing trace with hash 258970085, now seen corresponding path program 207 times [2021-06-05 21:33:10,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:10,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843080049] [2021-06-05 21:33:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:10,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:10,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843080049] [2021-06-05 21:33:10,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843080049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:10,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195028492] [2021-06-05 21:33:10,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:11,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:33:11,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:11,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:11,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:11,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:11,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:33:11,891 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 199 [2021-06-05 21:33:12,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:33:13,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:13,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:13,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:13,898 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:33:13,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:13,899 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:33:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:13,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195028492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:13,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:13,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:33:13,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145075] [2021-06-05 21:33:13,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:33:13,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:13,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:33:13,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:33:13,928 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:14,702 INFO L93 Difference]: Finished difference Result 1724 states and 5388 transitions. [2021-06-05 21:33:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:33:14,702 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:14,704 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 21:33:14,704 INFO L226 Difference]: Without dead ends: 1714 [2021-06-05 21:33:14,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 888.5ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:33:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-05 21:33:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1651. [2021-06-05 21:33:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 21:33:14,721 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 21:33:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:14,721 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 21:33:14,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 21:33:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:14,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:14,723 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:14,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22338 [2021-06-05 21:33:14,924 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:14,924 INFO L82 PathProgramCache]: Analyzing trace with hash -891850757, now seen corresponding path program 208 times [2021-06-05 21:33:14,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:14,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052878598] [2021-06-05 21:33:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:15,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:15,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052878598] [2021-06-05 21:33:15,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052878598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:15,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734137865] [2021-06-05 21:33:15,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:15,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:33:15,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:15,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:15,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:15,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:15,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:15,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:15,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:15,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:33:15,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:33:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:15,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734137865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:15,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:15,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:33:15,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789174681] [2021-06-05 21:33:15,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:33:15,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:33:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:33:15,782 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:16,269 INFO L93 Difference]: Finished difference Result 1678 states and 5309 transitions. [2021-06-05 21:33:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:33:16,269 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:16,271 INFO L225 Difference]: With dead ends: 1678 [2021-06-05 21:33:16,271 INFO L226 Difference]: Without dead ends: 1669 [2021-06-05 21:33:16,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:33:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-06-05 21:33:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1651. [2021-06-05 21:33:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.1854545454545455) internal successors, (5256), 1650 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5256 transitions. [2021-06-05 21:33:16,289 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5256 transitions. Word has length 19 [2021-06-05 21:33:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:16,289 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5256 transitions. [2021-06-05 21:33:16,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5256 transitions. [2021-06-05 21:33:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:16,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:16,290 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:16,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22765 [2021-06-05 21:33:16,491 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:16,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:16,491 INFO L82 PathProgramCache]: Analyzing trace with hash -148267397, now seen corresponding path program 209 times [2021-06-05 21:33:16,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:16,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997343427] [2021-06-05 21:33:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:33:16,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:16,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997343427] [2021-06-05 21:33:16,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997343427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:16,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884875319] [2021-06-05 21:33:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:16,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:33:16,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:16,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:16,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:16,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:16,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:33:18,098 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 214 [2021-06-05 21:33:18,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:33:18,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:18,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:19,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:19,454 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:33:19,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:19,455 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:33:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:19,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884875319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:19,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:19,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:33:19,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741665182] [2021-06-05 21:33:19,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:33:19,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:19,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:33:19,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:33:19,486 INFO L87 Difference]: Start difference. First operand 1651 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:20,162 INFO L93 Difference]: Finished difference Result 1770 states and 5538 transitions. [2021-06-05 21:33:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:33:20,162 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:20,164 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 21:33:20,164 INFO L226 Difference]: Without dead ends: 1760 [2021-06-05 21:33:20,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:33:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-06-05 21:33:20,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1651. [2021-06-05 21:33:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.1854545454545455) internal successors, (5256), 1650 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5256 transitions. [2021-06-05 21:33:20,182 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5256 transitions. Word has length 19 [2021-06-05 21:33:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:20,182 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5256 transitions. [2021-06-05 21:33:20,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5256 transitions. [2021-06-05 21:33:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:20,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:20,184 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:20,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22875,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:20,385 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash 702876735, now seen corresponding path program 210 times [2021-06-05 21:33:20,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:20,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859627918] [2021-06-05 21:33:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:20,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:20,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859627918] [2021-06-05 21:33:20,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859627918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:20,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858829223] [2021-06-05 21:33:20,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:20,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:33:20,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:20,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:20,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:20,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:20,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:33:21,406 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 239 [2021-06-05 21:33:23,081 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 400 [2021-06-05 21:33:23,470 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 437 [2021-06-05 21:33:23,754 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 437 [2021-06-05 21:33:24,072 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 442 [2021-06-05 21:33:24,324 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 361 [2021-06-05 21:33:24,476 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 218 [2021-06-05 21:33:24,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:33:25,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:25,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:25,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:25,540 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:33:25,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:25,541 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:33:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:25,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858829223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:25,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:25,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:33:25,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618100630] [2021-06-05 21:33:25,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:33:25,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:25,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:33:25,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:33:25,569 INFO L87 Difference]: Start difference. First operand 1651 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:26,354 INFO L93 Difference]: Finished difference Result 1871 states and 5788 transitions. [2021-06-05 21:33:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:33:26,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:26,356 INFO L225 Difference]: With dead ends: 1871 [2021-06-05 21:33:26,356 INFO L226 Difference]: Without dead ends: 1861 [2021-06-05 21:33:26,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 659.2ms TimeCoverageRelationStatistics Valid=240, Invalid=1922, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:33:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-06-05 21:33:26,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1631. [2021-06-05 21:33:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.1846625766871166) internal successors, (5191), 1630 states have internal predecessors, (5191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5191 transitions. [2021-06-05 21:33:26,375 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5191 transitions. Word has length 19 [2021-06-05 21:33:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:26,375 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5191 transitions. [2021-06-05 21:33:26,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5191 transitions. [2021-06-05 21:33:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:26,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:26,377 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:26,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23189 [2021-06-05 21:33:26,577 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:26,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1318541051, now seen corresponding path program 211 times [2021-06-05 21:33:26,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:26,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451566437] [2021-06-05 21:33:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:26,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:26,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451566437] [2021-06-05 21:33:26,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451566437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:26,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757208105] [2021-06-05 21:33:26,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:26,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:27,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:27,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:33:28,667 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 229 [2021-06-05 21:33:29,008 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 378 [2021-06-05 21:33:29,201 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 378 [2021-06-05 21:33:29,420 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 383 [2021-06-05 21:33:29,613 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 438 [2021-06-05 21:33:29,809 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 244 [2021-06-05 21:33:30,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:33:30,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:30,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:31,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:31,209 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:33:31,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:31,210 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:33:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:31,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757208105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:31,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:31,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:33:31,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373677631] [2021-06-05 21:33:31,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:33:31,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:31,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:33:31,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:33:31,240 INFO L87 Difference]: Start difference. First operand 1631 states and 5191 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:32,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:32,288 INFO L93 Difference]: Finished difference Result 1825 states and 5631 transitions. [2021-06-05 21:33:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:33:32,288 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:32,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:32,290 INFO L225 Difference]: With dead ends: 1825 [2021-06-05 21:33:32,290 INFO L226 Difference]: Without dead ends: 1813 [2021-06-05 21:33:32,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 905.1ms TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 21:33:32,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-06-05 21:33:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1647. [2021-06-05 21:33:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.1883353584447143) internal successors, (5248), 1646 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5248 transitions. [2021-06-05 21:33:32,308 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5248 transitions. Word has length 19 [2021-06-05 21:33:32,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:32,308 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5248 transitions. [2021-06-05 21:33:32,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5248 transitions. [2021-06-05 21:33:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:32,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:32,309 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:32,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23825,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:32,510 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:32,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1070701633, now seen corresponding path program 212 times [2021-06-05 21:33:32,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:32,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853100459] [2021-06-05 21:33:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:33:32,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853100459] [2021-06-05 21:33:32,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853100459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381526039] [2021-06-05 21:33:32,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:32,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:33:32,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:32,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:32,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:32,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:32,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:33:34,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:33:34,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:34,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:35,047 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 232 [2021-06-05 21:33:35,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:35,725 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:33:35,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:35,725 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:33:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:35,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381526039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:35,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:35,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:33:35,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189475702] [2021-06-05 21:33:35,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:33:35,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:35,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:33:35,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:33:35,755 INFO L87 Difference]: Start difference. First operand 1647 states and 5248 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:36,641 INFO L93 Difference]: Finished difference Result 1792 states and 5550 transitions. [2021-06-05 21:33:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:33:36,642 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:36,643 INFO L225 Difference]: With dead ends: 1792 [2021-06-05 21:33:36,644 INFO L226 Difference]: Without dead ends: 1780 [2021-06-05 21:33:36,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 861.6ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:33:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-06-05 21:33:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1649. [2021-06-05 21:33:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.183859223300971) internal successors, (5247), 1648 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5247 transitions. [2021-06-05 21:33:36,662 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5247 transitions. Word has length 19 [2021-06-05 21:33:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:36,662 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5247 transitions. [2021-06-05 21:33:36,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:36,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5247 transitions. [2021-06-05 21:33:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:36,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:36,663 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:36,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24317,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:36,864 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:36,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:36,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2122780805, now seen corresponding path program 213 times [2021-06-05 21:33:36,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:36,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199006198] [2021-06-05 21:33:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:36,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:36,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199006198] [2021-06-05 21:33:36,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199006198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:36,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18751345] [2021-06-05 21:33:36,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:37,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:33:37,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:37,003 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:37,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:37,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:37,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:33:38,167 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 262 [2021-06-05 21:33:38,406 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 329 [2021-06-05 21:33:38,525 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 282 [2021-06-05 21:33:38,690 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 246 [2021-06-05 21:33:39,554 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 276 [2021-06-05 21:33:39,733 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 304 [2021-06-05 21:33:40,014 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 354 [2021-06-05 21:33:40,392 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 452 [2021-06-05 21:33:40,846 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 492 [2021-06-05 21:33:41,356 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 535 [2021-06-05 21:33:41,881 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 535 [2021-06-05 21:33:42,449 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 701 DAG size of output: 540 [2021-06-05 21:33:42,756 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 427 [2021-06-05 21:33:43,012 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 310 [2021-06-05 21:33:43,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:33:43,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:43,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:43,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:43,776 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:33:43,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:43,776 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:33:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:43,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18751345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:43,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:43,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:33:43,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684305891] [2021-06-05 21:33:43,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:33:43,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:43,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:33:43,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:33:43,806 INFO L87 Difference]: Start difference. First operand 1649 states and 5247 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:44,662 INFO L93 Difference]: Finished difference Result 1801 states and 5581 transitions. [2021-06-05 21:33:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:33:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:44,665 INFO L225 Difference]: With dead ends: 1801 [2021-06-05 21:33:44,665 INFO L226 Difference]: Without dead ends: 1791 [2021-06-05 21:33:44,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 874.0ms TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:33:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-05 21:33:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1647. [2021-06-05 21:33:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.1859052247873634) internal successors, (5244), 1646 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5244 transitions. [2021-06-05 21:33:44,682 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5244 transitions. Word has length 19 [2021-06-05 21:33:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:44,682 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5244 transitions. [2021-06-05 21:33:44,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5244 transitions. [2021-06-05 21:33:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:44,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:44,684 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:44,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24781,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:44,884 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1987737538, now seen corresponding path program 214 times [2021-06-05 21:33:44,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:44,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033489338] [2021-06-05 21:33:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:44,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:44,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033489338] [2021-06-05 21:33:44,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033489338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:44,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888711887] [2021-06-05 21:33:44,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:44,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:33:44,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:44,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:33:44,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:44,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888711887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:44,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:44,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:33:44,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080844816] [2021-06-05 21:33:44,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:33:44,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:44,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:33:44,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:33:44,991 INFO L87 Difference]: Start difference. First operand 1647 states and 5244 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:45,099 INFO L93 Difference]: Finished difference Result 2586 states and 8045 transitions. [2021-06-05 21:33:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:33:45,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:45,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:45,102 INFO L225 Difference]: With dead ends: 2586 [2021-06-05 21:33:45,102 INFO L226 Difference]: Without dead ends: 2586 [2021-06-05 21:33:45,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:33:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-06-05 21:33:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2300. [2021-06-05 21:33:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.222270552414093) internal successors, (7408), 2299 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 7408 transitions. [2021-06-05 21:33:45,128 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 7408 transitions. Word has length 19 [2021-06-05 21:33:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:45,128 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 7408 transitions. [2021-06-05 21:33:45,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 7408 transitions. [2021-06-05 21:33:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:45,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:45,130 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:45,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25315 [2021-06-05 21:33:45,330 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:45,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:45,331 INFO L82 PathProgramCache]: Analyzing trace with hash -377496769, now seen corresponding path program 215 times [2021-06-05 21:33:45,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:45,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139153796] [2021-06-05 21:33:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:45,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:45,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139153796] [2021-06-05 21:33:45,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139153796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:45,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103194030] [2021-06-05 21:33:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:45,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:33:45,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:45,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:45,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:45,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:33:47,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:33:47,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:47,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:47,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:47,704 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:33:47,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:47,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:33:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:47,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103194030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:47,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:47,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:33:47,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527123035] [2021-06-05 21:33:47,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:33:47,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:47,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:33:47,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:33:47,734 INFO L87 Difference]: Start difference. First operand 2300 states and 7408 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:48,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:48,492 INFO L93 Difference]: Finished difference Result 2369 states and 7524 transitions. [2021-06-05 21:33:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:33:48,492 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:48,496 INFO L225 Difference]: With dead ends: 2369 [2021-06-05 21:33:48,496 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 21:33:48,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 863.7ms TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:33:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 21:33:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2300. [2021-06-05 21:33:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.222270552414093) internal successors, (7408), 2299 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 7408 transitions. [2021-06-05 21:33:48,527 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 7408 transitions. Word has length 19 [2021-06-05 21:33:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:48,527 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 7408 transitions. [2021-06-05 21:33:48,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 7408 transitions. [2021-06-05 21:33:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:48,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:48,530 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:48,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25316 [2021-06-05 21:33:48,750 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:48,751 INFO L82 PathProgramCache]: Analyzing trace with hash -504602600, now seen corresponding path program 216 times [2021-06-05 21:33:48,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:48,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429027184] [2021-06-05 21:33:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:48,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:48,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429027184] [2021-06-05 21:33:48,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429027184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:48,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381324136] [2021-06-05 21:33:48,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:48,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:33:48,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:33:48,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:48,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381324136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:48,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:48,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:33:48,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57153555] [2021-06-05 21:33:48,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:33:48,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:33:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:33:48,880 INFO L87 Difference]: Start difference. First operand 2300 states and 7408 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:49,054 INFO L93 Difference]: Finished difference Result 2557 states and 7954 transitions. [2021-06-05 21:33:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:33:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:49,057 INFO L225 Difference]: With dead ends: 2557 [2021-06-05 21:33:49,057 INFO L226 Difference]: Without dead ends: 2557 [2021-06-05 21:33:49,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:33:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-06-05 21:33:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2355. [2021-06-05 21:33:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.2196261682242993) internal successors, (7579), 2354 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7579 transitions. [2021-06-05 21:33:49,084 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7579 transitions. Word has length 19 [2021-06-05 21:33:49,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:49,084 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 7579 transitions. [2021-06-05 21:33:49,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:49,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7579 transitions. [2021-06-05 21:33:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:49,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:49,086 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:49,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25586,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:49,286 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:49,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2108266501, now seen corresponding path program 217 times [2021-06-05 21:33:49,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:49,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559750434] [2021-06-05 21:33:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:49,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:49,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559750434] [2021-06-05 21:33:49,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559750434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:49,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111125283] [2021-06-05 21:33:49,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:49,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:33:49,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:49,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:49,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:33:50,576 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 337 [2021-06-05 21:33:50,741 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 351 [2021-06-05 21:33:50,905 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 351 [2021-06-05 21:33:51,117 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 362 [2021-06-05 21:33:51,336 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 418 [2021-06-05 21:33:51,679 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 474 [2021-06-05 21:33:52,209 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 249 [2021-06-05 21:33:52,867 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 251 [2021-06-05 21:33:53,092 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 340 [2021-06-05 21:33:53,336 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 349 [2021-06-05 21:33:53,689 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 738 DAG size of output: 447 [2021-06-05 21:33:54,176 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 519 [2021-06-05 21:33:54,644 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 519 [2021-06-05 21:33:55,181 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 827 DAG size of output: 526 [2021-06-05 21:33:55,977 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 454 [2021-06-05 21:33:56,102 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 21:33:57,120 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 269 [2021-06-05 21:33:57,253 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 269 [2021-06-05 21:33:57,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:33:57,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:57,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:33:58,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:58,204 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:33:58,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:58,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:33:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:58,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111125283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:58,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:58,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:33:58,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339610053] [2021-06-05 21:33:58,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:33:58,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:58,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:33:58,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:33:58,235 INFO L87 Difference]: Start difference. First operand 2355 states and 7579 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:59,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:59,007 INFO L93 Difference]: Finished difference Result 2414 states and 7678 transitions. [2021-06-05 21:33:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:33:59,007 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:59,009 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 21:33:59,009 INFO L226 Difference]: Without dead ends: 2404 [2021-06-05 21:33:59,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 950.0ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:33:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-05 21:33:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2357. [2021-06-05 21:33:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 3.2181663837011882) internal successors, (7582), 2356 states have internal predecessors, (7582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 7582 transitions. [2021-06-05 21:33:59,036 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 7582 transitions. Word has length 19 [2021-06-05 21:33:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:59,036 INFO L482 AbstractCegarLoop]: Abstraction has 2357 states and 7582 transitions. [2021-06-05 21:33:59,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 7582 transitions. [2021-06-05 21:33:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:59,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:59,037 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:59,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25587 [2021-06-05 21:33:59,238 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:59,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:59,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1772059778, now seen corresponding path program 218 times [2021-06-05 21:33:59,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:59,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706960099] [2021-06-05 21:33:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:59,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:59,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706960099] [2021-06-05 21:33:59,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706960099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:59,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892104228] [2021-06-05 21:33:59,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:59,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:33:59,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:59,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:33:59,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:59,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892104228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:59,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:59,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:33:59,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244064386] [2021-06-05 21:33:59,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:33:59,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:59,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:33:59,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:33:59,347 INFO L87 Difference]: Start difference. First operand 2357 states and 7582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:59,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:59,552 INFO L93 Difference]: Finished difference Result 2614 states and 8095 transitions. [2021-06-05 21:33:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:33:59,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:33:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:59,554 INFO L225 Difference]: With dead ends: 2614 [2021-06-05 21:33:59,555 INFO L226 Difference]: Without dead ends: 2614 [2021-06-05 21:33:59,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:33:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-06-05 21:33:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2378. [2021-06-05 21:33:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 3.216238956668069) internal successors, (7645), 2377 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 7645 transitions. [2021-06-05 21:33:59,581 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 7645 transitions. Word has length 19 [2021-06-05 21:33:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:59,581 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 7645 transitions. [2021-06-05 21:33:59,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 7645 transitions. [2021-06-05 21:33:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:33:59,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:59,583 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:59,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26380,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:59,783 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1053335259, now seen corresponding path program 219 times [2021-06-05 21:33:59,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:59,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031098421] [2021-06-05 21:33:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:59,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:59,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031098421] [2021-06-05 21:33:59,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031098421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:59,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250957124] [2021-06-05 21:33:59,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:59,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:33:59,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:59,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 21:33:59,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:00,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:00,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:00,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:00,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:00,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:34:00,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:34:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:00,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250957124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:00,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:00,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:34:00,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173036160] [2021-06-05 21:34:00,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:34:00,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:00,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:34:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:34:00,695 INFO L87 Difference]: Start difference. First operand 2378 states and 7645 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:01,269 INFO L93 Difference]: Finished difference Result 2419 states and 7720 transitions. [2021-06-05 21:34:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:34:01,269 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:01,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:01,300 INFO L225 Difference]: With dead ends: 2419 [2021-06-05 21:34:01,300 INFO L226 Difference]: Without dead ends: 2404 [2021-06-05 21:34:01,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:34:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-05 21:34:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2381. [2021-06-05 21:34:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.2147058823529413) internal successors, (7651), 2380 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 7651 transitions. [2021-06-05 21:34:01,338 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 7651 transitions. Word has length 19 [2021-06-05 21:34:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:01,338 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 7651 transitions. [2021-06-05 21:34:01,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 7651 transitions. [2021-06-05 21:34:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:01,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:01,340 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:01,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26381,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:01,558 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:01,558 INFO L82 PathProgramCache]: Analyzing trace with hash -201001835, now seen corresponding path program 220 times [2021-06-05 21:34:01,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:01,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441329292] [2021-06-05 21:34:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:01,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:01,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441329292] [2021-06-05 21:34:01,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441329292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:01,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328947053] [2021-06-05 21:34:01,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:01,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:34:01,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:01,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:01,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:02,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:02,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:03,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:03,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:03,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:34:03,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:34:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:03,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328947053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:03,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:03,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:34:03,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958958253] [2021-06-05 21:34:03,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:34:03,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:34:03,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:34:03,047 INFO L87 Difference]: Start difference. First operand 2381 states and 7651 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:03,547 INFO L93 Difference]: Finished difference Result 2420 states and 7731 transitions. [2021-06-05 21:34:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:34:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:03,550 INFO L225 Difference]: With dead ends: 2420 [2021-06-05 21:34:03,550 INFO L226 Difference]: Without dead ends: 2411 [2021-06-05 21:34:03,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 492.3ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:34:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-05 21:34:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2384. [2021-06-05 21:34:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 3.214435585396559) internal successors, (7660), 2383 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 7660 transitions. [2021-06-05 21:34:03,575 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 7660 transitions. Word has length 19 [2021-06-05 21:34:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:03,576 INFO L482 AbstractCegarLoop]: Abstraction has 2384 states and 7660 transitions. [2021-06-05 21:34:03,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 7660 transitions. [2021-06-05 21:34:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:03,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:03,577 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:03,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26477,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:03,778 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:03,778 INFO L82 PathProgramCache]: Analyzing trace with hash 542581525, now seen corresponding path program 221 times [2021-06-05 21:34:03,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:03,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230573431] [2021-06-05 21:34:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:03,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:03,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230573431] [2021-06-05 21:34:03,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230573431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:03,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070129785] [2021-06-05 21:34:03,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:03,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:34:03,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:03,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:03,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:04,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:04,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:05,489 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 224 [2021-06-05 21:34:05,647 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 312 [2021-06-05 21:34:05,823 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 331 [2021-06-05 21:34:05,998 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 331 [2021-06-05 21:34:06,196 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 338 [2021-06-05 21:34:06,505 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 384 [2021-06-05 21:34:07,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:34:07,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:07,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:08,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:08,095 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:34:08,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:34:08,096 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:34:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:08,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070129785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:08,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:08,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:34:08,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510645754] [2021-06-05 21:34:08,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:34:08,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:34:08,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:34:08,128 INFO L87 Difference]: Start difference. First operand 2384 states and 7660 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:08,555 INFO L93 Difference]: Finished difference Result 2508 states and 7952 transitions. [2021-06-05 21:34:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:34:08,556 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:08,558 INFO L225 Difference]: With dead ends: 2508 [2021-06-05 21:34:08,558 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 21:34:08,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:34:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 21:34:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2382. [2021-06-05 21:34:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 3.2150356992860143) internal successors, (7655), 2381 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 7655 transitions. [2021-06-05 21:34:08,585 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 7655 transitions. Word has length 19 [2021-06-05 21:34:08,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:08,585 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 7655 transitions. [2021-06-05 21:34:08,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 7655 transitions. [2021-06-05 21:34:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:08,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:08,587 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:08,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26589 [2021-06-05 21:34:08,787 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:08,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:08,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1500320577, now seen corresponding path program 222 times [2021-06-05 21:34:08,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:08,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416531598] [2021-06-05 21:34:08,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:08,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416531598] [2021-06-05 21:34:08,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416531598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851475282] [2021-06-05 21:34:08,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:08,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:34:08,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:08,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:09,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:09,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:10,438 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 239 [2021-06-05 21:34:10,545 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 244 [2021-06-05 21:34:10,650 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 269 [2021-06-05 21:34:10,786 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 240 [2021-06-05 21:34:11,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:34:11,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:11,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:11,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:11,980 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:34:11,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:34:11,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:34:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:12,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851475282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:12,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:12,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:34:12,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662268769] [2021-06-05 21:34:12,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:34:12,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:34:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:34:12,010 INFO L87 Difference]: Start difference. First operand 2382 states and 7655 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:12,873 INFO L93 Difference]: Finished difference Result 2503 states and 7954 transitions. [2021-06-05 21:34:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:34:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:12,876 INFO L225 Difference]: With dead ends: 2503 [2021-06-05 21:34:12,876 INFO L226 Difference]: Without dead ends: 2493 [2021-06-05 21:34:12,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 938.7ms TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:34:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-06-05 21:34:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2382. [2021-06-05 21:34:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 3.2150356992860143) internal successors, (7655), 2381 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:12,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 7655 transitions. [2021-06-05 21:34:12,901 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 7655 transitions. Word has length 19 [2021-06-05 21:34:12,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:12,901 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 7655 transitions. [2021-06-05 21:34:12,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:12,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 7655 transitions. [2021-06-05 21:34:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:12,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:12,903 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:13,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27140 [2021-06-05 21:34:13,103 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:13,104 INFO L82 PathProgramCache]: Analyzing trace with hash -440749611, now seen corresponding path program 223 times [2021-06-05 21:34:13,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:13,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396753581] [2021-06-05 21:34:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:34:13,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:13,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396753581] [2021-06-05 21:34:13,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396753581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:13,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118875995] [2021-06-05 21:34:13,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:13,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:13,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:13,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:14,728 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 239 [2021-06-05 21:34:14,869 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 239 [2021-06-05 21:34:15,001 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 244 [2021-06-05 21:34:15,114 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 241 [2021-06-05 21:34:15,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:34:15,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:15,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:16,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:16,208 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:34:16,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:34:16,208 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:34:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:16,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118875995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:16,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:16,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:34:16,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435369512] [2021-06-05 21:34:16,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:34:16,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:16,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:34:16,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:34:16,236 INFO L87 Difference]: Start difference. First operand 2382 states and 7655 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:17,137 INFO L93 Difference]: Finished difference Result 2624 states and 8231 transitions. [2021-06-05 21:34:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:34:17,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:17,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:17,140 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 21:34:17,140 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 21:34:17,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 820.9ms TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 21:34:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 21:34:17,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2395. [2021-06-05 21:34:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 21:34:17,167 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 21:34:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:17,167 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 21:34:17,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 21:34:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:17,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:17,169 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:17,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27516 [2021-06-05 21:34:17,369 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:17,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2136787431, now seen corresponding path program 224 times [2021-06-05 21:34:17,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:17,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595437223] [2021-06-05 21:34:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:17,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:17,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595437223] [2021-06-05 21:34:17,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595437223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:17,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017119747] [2021-06-05 21:34:17,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:17,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:34:17,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:17,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:17,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:17,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:17,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:18,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:34:18,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:18,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:19,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:19,644 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:34:19,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:34:19,645 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:34:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:19,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017119747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:19,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:19,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:34:19,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220559755] [2021-06-05 21:34:19,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:34:19,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:19,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:34:19,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:34:19,674 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:20,544 INFO L93 Difference]: Finished difference Result 2495 states and 7900 transitions. [2021-06-05 21:34:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:34:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:20,547 INFO L225 Difference]: With dead ends: 2495 [2021-06-05 21:34:20,547 INFO L226 Difference]: Without dead ends: 2485 [2021-06-05 21:34:20,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 979.4ms TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:34:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-05 21:34:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2395. [2021-06-05 21:34:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 21:34:20,574 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 21:34:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:20,574 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 21:34:20,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 21:34:20,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:20,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:20,576 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:20,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27878 [2021-06-05 21:34:20,776 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 427410133, now seen corresponding path program 225 times [2021-06-05 21:34:20,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:20,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832286661] [2021-06-05 21:34:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:20,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:20,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832286661] [2021-06-05 21:34:20,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832286661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:20,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19503906] [2021-06-05 21:34:20,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:20,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:34:20,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:20,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:21,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:21,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:21,898 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 284 [2021-06-05 21:34:22,005 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 295 [2021-06-05 21:34:22,111 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 295 [2021-06-05 21:34:22,241 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 306 [2021-06-05 21:34:22,365 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 300 [2021-06-05 21:34:22,476 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 295 [2021-06-05 21:34:23,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:34:23,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:23,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:24,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:24,332 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:34:24,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:34:24,333 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:34:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:24,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19503906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:24,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:24,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:34:24,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962000682] [2021-06-05 21:34:24,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:34:24,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:24,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:34:24,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:34:24,362 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:25,232 INFO L93 Difference]: Finished difference Result 2453 states and 7797 transitions. [2021-06-05 21:34:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:34:25,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:25,235 INFO L225 Difference]: With dead ends: 2453 [2021-06-05 21:34:25,235 INFO L226 Difference]: Without dead ends: 2443 [2021-06-05 21:34:25,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1003.1ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:34:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-05 21:34:25,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2395. [2021-06-05 21:34:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 21:34:25,261 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 21:34:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:25,261 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 21:34:25,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 21:34:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:25,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:25,263 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:25,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28250,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:25,465 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:25,465 INFO L82 PathProgramCache]: Analyzing trace with hash -906777413, now seen corresponding path program 226 times [2021-06-05 21:34:25,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:25,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046689584] [2021-06-05 21:34:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:25,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:25,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046689584] [2021-06-05 21:34:25,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046689584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:25,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485791284] [2021-06-05 21:34:25,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:25,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:34:25,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:25,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:25,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:25,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:25,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:26,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:26,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:26,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:34:26,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:34:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:26,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485791284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:26,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:26,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:34:26,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244078836] [2021-06-05 21:34:26,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:34:26,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:26,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:34:26,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:34:26,868 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:27,308 INFO L93 Difference]: Finished difference Result 2431 states and 7773 transitions. [2021-06-05 21:34:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:34:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:27,312 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 21:34:27,312 INFO L226 Difference]: Without dead ends: 2422 [2021-06-05 21:34:27,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:34:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-05 21:34:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2396. [2021-06-05 21:34:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 3.215866388308977) internal successors, (7702), 2395 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7702 transitions. [2021-06-05 21:34:27,338 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7702 transitions. Word has length 19 [2021-06-05 21:34:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:27,338 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 7702 transitions. [2021-06-05 21:34:27,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7702 transitions. [2021-06-05 21:34:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:27,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:27,340 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:27,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28650 [2021-06-05 21:34:27,540 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:27,540 INFO L82 PathProgramCache]: Analyzing trace with hash -163194053, now seen corresponding path program 227 times [2021-06-05 21:34:27,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:27,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875684976] [2021-06-05 21:34:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:27,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:27,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875684976] [2021-06-05 21:34:27,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875684976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:27,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307595618] [2021-06-05 21:34:27,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:27,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:34:27,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:27,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:27,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:27,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:27,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:28,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:34:28,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:28,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:29,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:29,354 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:34:29,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:34:29,355 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:34:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:29,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307595618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:29,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:29,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:34:29,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667972560] [2021-06-05 21:34:29,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:34:29,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:29,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:34:29,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:34:29,386 INFO L87 Difference]: Start difference. First operand 2396 states and 7702 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:30,206 INFO L93 Difference]: Finished difference Result 2570 states and 8139 transitions. [2021-06-05 21:34:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:34:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:30,209 INFO L225 Difference]: With dead ends: 2570 [2021-06-05 21:34:30,209 INFO L226 Difference]: Without dead ends: 2560 [2021-06-05 21:34:30,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:34:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-06-05 21:34:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2395. [2021-06-05 21:34:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 21:34:30,235 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 21:34:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:30,235 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 21:34:30,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 21:34:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:30,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:30,237 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:30,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28834,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:30,437 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash 687950079, now seen corresponding path program 228 times [2021-06-05 21:34:30,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:30,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596320608] [2021-06-05 21:34:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:30,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:30,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596320608] [2021-06-05 21:34:30,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596320608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:30,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125404130] [2021-06-05 21:34:30,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:30,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:34:30,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:30,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:30,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:30,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:30,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:32,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:34:32,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:32,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:32,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:32,824 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:34:32,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:34:32,824 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:34:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:32,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125404130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:32,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:32,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:34:32,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801291693] [2021-06-05 21:34:32,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:34:32,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:34:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:34:32,853 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:33,859 INFO L93 Difference]: Finished difference Result 2690 states and 8440 transitions. [2021-06-05 21:34:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:34:33,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:33,862 INFO L225 Difference]: With dead ends: 2690 [2021-06-05 21:34:33,863 INFO L226 Difference]: Without dead ends: 2680 [2021-06-05 21:34:33,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 811.7ms TimeCoverageRelationStatistics Valid=289, Invalid=2363, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 21:34:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-05 21:34:33,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2245. [2021-06-05 21:34:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.2076648841354722) internal successors, (7198), 2244 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7198 transitions. [2021-06-05 21:34:33,889 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7198 transitions. Word has length 19 [2021-06-05 21:34:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:33,889 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7198 transitions. [2021-06-05 21:34:33,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7198 transitions. [2021-06-05 21:34:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:33,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:33,891 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:34,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29092 [2021-06-05 21:34:34,091 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:34,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:34,092 INFO L82 PathProgramCache]: Analyzing trace with hash 26686296, now seen corresponding path program 229 times [2021-06-05 21:34:34,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:34,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995488336] [2021-06-05 21:34:34,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:34,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:34,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995488336] [2021-06-05 21:34:34,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995488336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:34,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682927767] [2021-06-05 21:34:34,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:34,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:34:34,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:34:34,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682927767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:34,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:34,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:34:34,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753380278] [2021-06-05 21:34:34,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:34:34,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:34:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:34:34,202 INFO L87 Difference]: Start difference. First operand 2245 states and 7198 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:34,278 INFO L93 Difference]: Finished difference Result 2914 states and 8965 transitions. [2021-06-05 21:34:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:34:34,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:34,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:34,281 INFO L225 Difference]: With dead ends: 2914 [2021-06-05 21:34:34,281 INFO L226 Difference]: Without dead ends: 2914 [2021-06-05 21:34:34,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:34:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-06-05 21:34:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2672. [2021-06-05 21:34:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 3.2100336952452264) internal successors, (8574), 2671 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 8574 transitions. [2021-06-05 21:34:34,314 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 8574 transitions. Word has length 19 [2021-06-05 21:34:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:34,314 INFO L482 AbstractCegarLoop]: Abstraction has 2672 states and 8574 transitions. [2021-06-05 21:34:34,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 8574 transitions. [2021-06-05 21:34:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:34,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:34,316 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:34,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29452,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:34,517 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1303614395, now seen corresponding path program 230 times [2021-06-05 21:34:34,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:34,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060484596] [2021-06-05 21:34:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:34,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:34,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060484596] [2021-06-05 21:34:34,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060484596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:34,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972282470] [2021-06-05 21:34:34,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:34,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:34:34,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:34,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:34,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:34,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:34,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:35,459 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 201 [2021-06-05 21:34:36,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:34:36,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:36,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:37,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:37,041 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:34:37,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:34:37,042 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:34:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:37,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972282470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:37,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:37,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:34:37,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344391585] [2021-06-05 21:34:37,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:34:37,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:37,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:34:37,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:34:37,071 INFO L87 Difference]: Start difference. First operand 2672 states and 8574 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:38,272 INFO L93 Difference]: Finished difference Result 3059 states and 9551 transitions. [2021-06-05 21:34:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 21:34:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:38,275 INFO L225 Difference]: With dead ends: 3059 [2021-06-05 21:34:38,276 INFO L226 Difference]: Without dead ends: 3049 [2021-06-05 21:34:38,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1010.7ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:34:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-05 21:34:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2623. [2021-06-05 21:34:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2622 states have (on average 3.2070938215102975) internal successors, (8409), 2622 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 8409 transitions. [2021-06-05 21:34:38,305 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 8409 transitions. Word has length 19 [2021-06-05 21:34:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:38,305 INFO L482 AbstractCegarLoop]: Abstraction has 2623 states and 8409 transitions. [2021-06-05 21:34:38,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 8409 transitions. [2021-06-05 21:34:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:38,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:38,307 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:38,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29453,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:38,507 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2034173506, now seen corresponding path program 231 times [2021-06-05 21:34:38,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:38,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721694950] [2021-06-05 21:34:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:38,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:38,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721694950] [2021-06-05 21:34:38,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721694950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:38,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757024687] [2021-06-05 21:34:38,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:38,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:34:38,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:34:38,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:38,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757024687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:38,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:38,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:34:38,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285423743] [2021-06-05 21:34:38,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:34:38,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:38,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:34:38,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:34:38,610 INFO L87 Difference]: Start difference. First operand 2623 states and 8409 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:38,723 INFO L93 Difference]: Finished difference Result 2885 states and 8823 transitions. [2021-06-05 21:34:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:34:38,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:38,725 INFO L225 Difference]: With dead ends: 2885 [2021-06-05 21:34:38,725 INFO L226 Difference]: Without dead ends: 2885 [2021-06-05 21:34:38,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:34:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-06-05 21:34:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2399. [2021-06-05 21:34:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 2398 states have (on average 3.187656380316931) internal successors, (7644), 2398 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 7644 transitions. [2021-06-05 21:34:38,752 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 7644 transitions. Word has length 19 [2021-06-05 21:34:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:38,752 INFO L482 AbstractCegarLoop]: Abstraction has 2399 states and 7644 transitions. [2021-06-05 21:34:38,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 7644 transitions. [2021-06-05 21:34:38,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:38,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:38,754 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:38,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29771 [2021-06-05 21:34:38,955 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1085628289, now seen corresponding path program 232 times [2021-06-05 21:34:38,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:38,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136005142] [2021-06-05 21:34:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:39,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:39,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136005142] [2021-06-05 21:34:39,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136005142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:39,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749780227] [2021-06-05 21:34:39,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:39,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:34:39,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:39,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:39,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:40,572 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 494 [2021-06-05 21:34:40,810 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 494 [2021-06-05 21:34:41,070 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 613 DAG size of output: 505 [2021-06-05 21:34:41,529 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 569 [2021-06-05 21:34:42,547 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 294 [2021-06-05 21:34:43,090 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 383 [2021-06-05 21:34:43,580 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 295 [2021-06-05 21:34:43,983 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 506 [2021-06-05 21:34:44,646 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 619 [2021-06-05 21:34:45,294 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 619 [2021-06-05 21:34:45,984 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 624 [2021-06-05 21:34:46,333 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 473 [2021-06-05 21:34:46,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:34:46,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:46,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:47,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:47,405 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:34:47,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:34:47,405 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:34:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:47,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749780227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:47,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:47,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:34:47,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347544719] [2021-06-05 21:34:47,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:34:47,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:47,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:34:47,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:34:47,435 INFO L87 Difference]: Start difference. First operand 2399 states and 7644 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:48,626 INFO L93 Difference]: Finished difference Result 2756 states and 8561 transitions. [2021-06-05 21:34:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 21:34:48,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:48,629 INFO L225 Difference]: With dead ends: 2756 [2021-06-05 21:34:48,629 INFO L226 Difference]: Without dead ends: 2744 [2021-06-05 21:34:48,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1087.8ms TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 21:34:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-06-05 21:34:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2477. [2021-06-05 21:34:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.1902261712439417) internal successors, (7899), 2476 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 7899 transitions. [2021-06-05 21:34:48,656 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 7899 transitions. Word has length 19 [2021-06-05 21:34:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:48,657 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 7899 transitions. [2021-06-05 21:34:48,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 7899 transitions. [2021-06-05 21:34:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:48,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:48,659 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:48,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29772,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:48,859 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:48,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1496317928, now seen corresponding path program 233 times [2021-06-05 21:34:48,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:48,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608914650] [2021-06-05 21:34:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:48,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:48,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608914650] [2021-06-05 21:34:48,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608914650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:48,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958245207] [2021-06-05 21:34:48,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:48,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:34:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:48,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:34:48,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:49,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958245207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:49,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:49,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:34:49,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991813296] [2021-06-05 21:34:49,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:34:49,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:49,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:34:49,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:34:49,034 INFO L87 Difference]: Start difference. First operand 2477 states and 7899 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:49,129 INFO L93 Difference]: Finished difference Result 3089 states and 9579 transitions. [2021-06-05 21:34:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:34:49,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:49,133 INFO L225 Difference]: With dead ends: 3089 [2021-06-05 21:34:49,133 INFO L226 Difference]: Without dead ends: 3089 [2021-06-05 21:34:49,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:34:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-06-05 21:34:49,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2881. [2021-06-05 21:34:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.1899305555555557) internal successors, (9187), 2880 states have internal predecessors, (9187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9187 transitions. [2021-06-05 21:34:49,164 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9187 transitions. Word has length 19 [2021-06-05 21:34:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:49,165 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 9187 transitions. [2021-06-05 21:34:49,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9187 transitions. [2021-06-05 21:34:49,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:49,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:49,167 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:49,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30406,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:49,367 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:49,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2137707461, now seen corresponding path program 234 times [2021-06-05 21:34:49,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:49,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129443813] [2021-06-05 21:34:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:34:49,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:49,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129443813] [2021-06-05 21:34:49,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129443813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:49,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428025283] [2021-06-05 21:34:49,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:49,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:34:49,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:49,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:49,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:49,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:49,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:50,571 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 210 [2021-06-05 21:34:50,708 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 244 [2021-06-05 21:34:51,647 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 226 [2021-06-05 21:34:51,793 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 239 [2021-06-05 21:34:52,733 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 745 DAG size of output: 381 [2021-06-05 21:34:52,999 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 382 [2021-06-05 21:34:53,283 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 382 [2021-06-05 21:34:53,572 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 387 [2021-06-05 21:34:53,788 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 282 [2021-06-05 21:34:54,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:34:54,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:54,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:34:54,754 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 274 [2021-06-05 21:34:55,056 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 254 [2021-06-05 21:34:56,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:56,315 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:34:56,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:34:56,315 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:34:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:56,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428025283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:56,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:56,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:34:56,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886772809] [2021-06-05 21:34:56,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:34:56,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:56,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:34:56,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:34:56,345 INFO L87 Difference]: Start difference. First operand 2881 states and 9187 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:57,376 INFO L93 Difference]: Finished difference Result 3023 states and 9474 transitions. [2021-06-05 21:34:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:34:57,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:57,380 INFO L225 Difference]: With dead ends: 3023 [2021-06-05 21:34:57,380 INFO L226 Difference]: Without dead ends: 3013 [2021-06-05 21:34:57,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1048.6ms TimeCoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 21:34:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-06-05 21:34:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2883. [2021-06-05 21:34:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2882 states have (on average 3.1887578070784177) internal successors, (9190), 2882 states have internal predecessors, (9190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 9190 transitions. [2021-06-05 21:34:57,412 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 9190 transitions. Word has length 19 [2021-06-05 21:34:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:57,412 INFO L482 AbstractCegarLoop]: Abstraction has 2883 states and 9190 transitions. [2021-06-05 21:34:57,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 9190 transitions. [2021-06-05 21:34:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:57,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:57,414 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:57,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30407 [2021-06-05 21:34:57,615 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:57,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2002664194, now seen corresponding path program 235 times [2021-06-05 21:34:57,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:57,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111140409] [2021-06-05 21:34:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:34:57,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:57,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111140409] [2021-06-05 21:34:57,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111140409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:57,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408199779] [2021-06-05 21:34:57,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:57,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:34:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:34:57,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408199779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:57,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:57,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:34:57,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424150552] [2021-06-05 21:34:57,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:34:57,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:34:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:34:57,716 INFO L87 Difference]: Start difference. First operand 2883 states and 9190 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:57,786 INFO L93 Difference]: Finished difference Result 3131 states and 9825 transitions. [2021-06-05 21:34:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:34:57,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:34:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:57,789 INFO L225 Difference]: With dead ends: 3131 [2021-06-05 21:34:57,789 INFO L226 Difference]: Without dead ends: 3131 [2021-06-05 21:34:57,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:34:57,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-06-05 21:34:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3025. [2021-06-05 21:34:57,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.181878306878307) internal successors, (9622), 3024 states have internal predecessors, (9622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 9622 transitions. [2021-06-05 21:34:57,820 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 9622 transitions. Word has length 19 [2021-06-05 21:34:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:57,821 INFO L482 AbstractCegarLoop]: Abstraction has 3025 states and 9622 transitions. [2021-06-05 21:34:57,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 9622 transitions. [2021-06-05 21:34:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:34:57,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:57,823 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:58,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31140,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:58,025 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:58,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:58,025 INFO L82 PathProgramCache]: Analyzing trace with hash -392423425, now seen corresponding path program 236 times [2021-06-05 21:34:58,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:58,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30625300] [2021-06-05 21:34:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:58,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:58,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30625300] [2021-06-05 21:34:58,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30625300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:58,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576359182] [2021-06-05 21:34:58,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:58,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:34:58,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:58,164 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:34:58,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:58,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:58,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:34:59,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:35:00,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:00,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:35:01,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:01,199 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:35:01,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:35:01,200 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:35:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:01,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576359182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:01,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:01,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:35:01,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619386617] [2021-06-05 21:35:01,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:35:01,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:01,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:35:01,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:35:01,231 INFO L87 Difference]: Start difference. First operand 3025 states and 9622 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:02,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:02,262 INFO L93 Difference]: Finished difference Result 3173 states and 9925 transitions. [2021-06-05 21:35:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:35:02,263 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:35:02,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:02,266 INFO L225 Difference]: With dead ends: 3173 [2021-06-05 21:35:02,266 INFO L226 Difference]: Without dead ends: 3163 [2021-06-05 21:35:02,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1072.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:35:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-06-05 21:35:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3021. [2021-06-05 21:35:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3020 states have (on average 3.1841059602649007) internal successors, (9616), 3020 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 9616 transitions. [2021-06-05 21:35:02,300 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 9616 transitions. Word has length 19 [2021-06-05 21:35:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:02,300 INFO L482 AbstractCegarLoop]: Abstraction has 3021 states and 9616 transitions. [2021-06-05 21:35:02,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:02,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 9616 transitions. [2021-06-05 21:35:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:35:02,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:02,302 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:02,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31141 [2021-06-05 21:35:02,502 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:02,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:02,503 INFO L82 PathProgramCache]: Analyzing trace with hash -519529256, now seen corresponding path program 237 times [2021-06-05 21:35:02,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:02,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890496042] [2021-06-05 21:35:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:02,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:02,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890496042] [2021-06-05 21:35:02,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890496042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:02,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330205734] [2021-06-05 21:35:02,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:02,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:35:02,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:35:02,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:02,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330205734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:02,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:02,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:35:02,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142687635] [2021-06-05 21:35:02,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:35:02,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:02,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:35:02,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:35:02,615 INFO L87 Difference]: Start difference. First operand 3021 states and 9616 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:02,740 INFO L93 Difference]: Finished difference Result 3182 states and 9942 transitions. [2021-06-05 21:35:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:35:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:35:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:02,743 INFO L225 Difference]: With dead ends: 3182 [2021-06-05 21:35:02,743 INFO L226 Difference]: Without dead ends: 3182 [2021-06-05 21:35:02,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:35:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-05 21:35:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3046. [2021-06-05 21:35:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.182594417077176) internal successors, (9691), 3045 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 9691 transitions. [2021-06-05 21:35:02,777 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 9691 transitions. Word has length 19 [2021-06-05 21:35:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:02,777 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 9691 transitions. [2021-06-05 21:35:02,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 9691 transitions. [2021-06-05 21:35:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:35:02,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:02,779 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:02,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31481,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:02,980 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:02,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:02,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2123193157, now seen corresponding path program 238 times [2021-06-05 21:35:02,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:02,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651942020] [2021-06-05 21:35:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:03,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:03,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651942020] [2021-06-05 21:35:03,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651942020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:03,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890791240] [2021-06-05 21:35:03,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:03,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:35:03,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:03,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:35:03,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:03,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:03,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:35:04,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:35:04,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:04,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:35:05,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:05,493 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:35:05,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:35:05,493 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:35:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:05,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890791240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:05,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:05,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:35:05,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109024094] [2021-06-05 21:35:05,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:35:05,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:05,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:35:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:35:05,524 INFO L87 Difference]: Start difference. First operand 3046 states and 9691 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:06,425 INFO L93 Difference]: Finished difference Result 3126 states and 9832 transitions. [2021-06-05 21:35:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:35:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:06,429 INFO L225 Difference]: With dead ends: 3126 [2021-06-05 21:35:06,429 INFO L226 Difference]: Without dead ends: 3116 [2021-06-05 21:35:06,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1035.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:35:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-05 21:35:06,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3046. [2021-06-05 21:35:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.182594417077176) internal successors, (9691), 3045 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 9691 transitions. [2021-06-05 21:35:06,461 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 9691 transitions. Word has length 19 [2021-06-05 21:35:06,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:06,461 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 9691 transitions. [2021-06-05 21:35:06,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:06,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 9691 transitions. [2021-06-05 21:35:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:35:06,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:06,463 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:06,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31482,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:06,665 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:06,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1786986434, now seen corresponding path program 239 times [2021-06-05 21:35:06,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:06,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106894604] [2021-06-05 21:35:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:06,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:06,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106894604] [2021-06-05 21:35:06,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106894604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:06,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155231756] [2021-06-05 21:35:06,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:06,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:35:06,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:06,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:35:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:06,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155231756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:06,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:06,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:35:06,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384569633] [2021-06-05 21:35:06,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:35:06,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:06,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:35:06,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:35:06,779 INFO L87 Difference]: Start difference. First operand 3046 states and 9691 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:06,939 INFO L93 Difference]: Finished difference Result 3257 states and 10135 transitions. [2021-06-05 21:35:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:35:06,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:35:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:06,943 INFO L225 Difference]: With dead ends: 3257 [2021-06-05 21:35:06,943 INFO L226 Difference]: Without dead ends: 3257 [2021-06-05 21:35:06,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:35:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-06-05 21:35:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3085. [2021-06-05 21:35:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.180285343709468) internal successors, (9808), 3084 states have internal predecessors, (9808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 9808 transitions. [2021-06-05 21:35:06,978 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 9808 transitions. Word has length 19 [2021-06-05 21:35:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:06,978 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 9808 transitions. [2021-06-05 21:35:06,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 9808 transitions. [2021-06-05 21:35:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:35:06,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:06,980 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:07,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31804,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:07,181 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:07,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:07,181 INFO L82 PathProgramCache]: Analyzing trace with hash 57519999, now seen corresponding path program 240 times [2021-06-05 21:35:07,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:07,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479743313] [2021-06-05 21:35:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:07,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:07,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479743313] [2021-06-05 21:35:07,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479743313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:07,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461430429] [2021-06-05 21:35:07,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:07,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:35:07,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:07,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:35:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:07,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:07,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 21:35:08,229 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 203 [2021-06-05 21:35:09,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:35:09,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:09,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:35:09,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:09,925 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:35:09,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:35:09,926 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 21:35:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:09,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461430429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:09,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:09,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:35:09,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903264805] [2021-06-05 21:35:09,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:35:09,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:09,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:35:09,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:35:09,957 INFO L87 Difference]: Start difference. First operand 3085 states and 9808 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:10,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:10,896 INFO L93 Difference]: Finished difference Result 3146 states and 9913 transitions. [2021-06-05 21:35:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:10,897 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:35:10,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:10,900 INFO L225 Difference]: With dead ends: 3146 [2021-06-05 21:35:10,900 INFO L226 Difference]: Without dead ends: 3136 [2021-06-05 21:35:10,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1107.6ms TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:35:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-05 21:35:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 3087. [2021-06-05 21:35:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 3086 states have (on average 3.179196370706416) internal successors, (9811), 3086 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 9811 transitions. [2021-06-05 21:35:10,935 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 9811 transitions. Word has length 19 [2021-06-05 21:35:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:10,935 INFO L482 AbstractCegarLoop]: Abstraction has 3087 states and 9811 transitions. [2021-06-05 21:35:10,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 9811 transitions. [2021-06-05 21:35:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:35:10,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:10,937 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:11,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31805,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:11,138 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:11,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1871514008, now seen corresponding path program 241 times [2021-06-05 21:35:11,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:11,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291746067] [2021-06-05 21:35:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:11,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:11,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291746067] [2021-06-05 21:35:11,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291746067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:11,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423013830] [2021-06-05 21:35:11,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:11,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:35:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:11,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423013830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:11,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:11,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:35:11,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198546814] [2021-06-05 21:35:11,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:35:11,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:11,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:35:11,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:35:11,254 INFO L87 Difference]: Start difference. First operand 3087 states and 9811 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:11,440 INFO L93 Difference]: Finished difference Result 3398 states and 10507 transitions. [2021-06-05 21:35:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:35:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:35:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:11,443 INFO L225 Difference]: With dead ends: 3398 [2021-06-05 21:35:11,444 INFO L226 Difference]: Without dead ends: 3398 [2021-06-05 21:35:11,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=256, Invalid=500, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:35:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-06-05 21:35:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 3101. [2021-06-05 21:35:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.1783870967741934) internal successors, (9853), 3100 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9853 transitions. [2021-06-05 21:35:11,481 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9853 transitions. Word has length 19 [2021-06-05 21:35:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:11,481 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 9853 transitions. [2021-06-05 21:35:11,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9853 transitions. [2021-06-05 21:35:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:11,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:11,483 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:11,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32229,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:11,684 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:11,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1968008967, now seen corresponding path program 242 times [2021-06-05 21:35:11,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:11,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980442168] [2021-06-05 21:35:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:11,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:11,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980442168] [2021-06-05 21:35:11,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980442168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:11,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317225892] [2021-06-05 21:35:11,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:11,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:35:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:11,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:35:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:12,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:35:13,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:13,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:13,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:13,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:35:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:13,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317225892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:13,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:13,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:35:13,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595034286] [2021-06-05 21:35:13,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:35:13,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:13,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:35:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:35:13,645 INFO L87 Difference]: Start difference. First operand 3101 states and 9853 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:14,056 INFO L93 Difference]: Finished difference Result 3193 states and 10066 transitions. [2021-06-05 21:35:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:14,059 INFO L225 Difference]: With dead ends: 3193 [2021-06-05 21:35:14,059 INFO L226 Difference]: Without dead ends: 3182 [2021-06-05 21:35:14,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:35:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-05 21:35:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3124. [2021-06-05 21:35:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.1777137367915467) internal successors, (9924), 3123 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 9924 transitions. [2021-06-05 21:35:14,093 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 9924 transitions. Word has length 20 [2021-06-05 21:35:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:14,093 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 9924 transitions. [2021-06-05 21:35:14,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 9924 transitions. [2021-06-05 21:35:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:14,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:14,095 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:14,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32230,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:14,296 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:14,296 INFO L82 PathProgramCache]: Analyzing trace with hash -750369269, now seen corresponding path program 243 times [2021-06-05 21:35:14,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:14,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588582567] [2021-06-05 21:35:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:14,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588582567] [2021-06-05 21:35:14,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588582567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207323602] [2021-06-05 21:35:14,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:14,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:35:14,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:35:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:14,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:14,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:35:16,203 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 238 [2021-06-05 21:35:16,442 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 326 [2021-06-05 21:35:16,645 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 326 [2021-06-05 21:35:16,871 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 331 [2021-06-05 21:35:17,203 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 404 [2021-06-05 21:35:17,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:17,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:17,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:17,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:35:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:17,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207323602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:17,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:17,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:35:17,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605424368] [2021-06-05 21:35:17,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:35:17,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:17,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:35:17,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:35:17,811 INFO L87 Difference]: Start difference. First operand 3124 states and 9924 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:18,274 INFO L93 Difference]: Finished difference Result 3211 states and 10096 transitions. [2021-06-05 21:35:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:35:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:18,278 INFO L225 Difference]: With dead ends: 3211 [2021-06-05 21:35:18,278 INFO L226 Difference]: Without dead ends: 3206 [2021-06-05 21:35:18,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:35:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-06-05 21:35:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3124. [2021-06-05 21:35:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.1777137367915467) internal successors, (9924), 3123 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 9924 transitions. [2021-06-05 21:35:18,318 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 9924 transitions. Word has length 20 [2021-06-05 21:35:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:18,318 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 9924 transitions. [2021-06-05 21:35:18,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 9924 transitions. [2021-06-05 21:35:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:18,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:18,322 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:18,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32498 [2021-06-05 21:35:18,524 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:18,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:18,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1411633052, now seen corresponding path program 244 times [2021-06-05 21:35:18,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:18,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563700155] [2021-06-05 21:35:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:18,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:18,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563700155] [2021-06-05 21:35:18,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563700155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:18,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986915922] [2021-06-05 21:35:18,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:18,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:35:18,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:18,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:35:18,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:18,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986915922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:18,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:18,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:35:18,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162681836] [2021-06-05 21:35:18,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:35:18,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:18,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:35:18,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:35:18,639 INFO L87 Difference]: Start difference. First operand 3124 states and 9924 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:18,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:18,712 INFO L93 Difference]: Finished difference Result 3606 states and 10977 transitions. [2021-06-05 21:35:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:35:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:18,718 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 21:35:18,718 INFO L226 Difference]: Without dead ends: 3606 [2021-06-05 21:35:18,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:35:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-06-05 21:35:18,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3155. [2021-06-05 21:35:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 3.182625237793278) internal successors, (10038), 3154 states have internal predecessors, (10038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 10038 transitions. [2021-06-05 21:35:18,758 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 10038 transitions. Word has length 20 [2021-06-05 21:35:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:18,758 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 10038 transitions. [2021-06-05 21:35:18,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 10038 transitions. [2021-06-05 21:35:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:18,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:18,761 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:18,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32792 [2021-06-05 21:35:18,966 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1981379847, now seen corresponding path program 245 times [2021-06-05 21:35:18,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:18,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538625237] [2021-06-05 21:35:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:19,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:19,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538625237] [2021-06-05 21:35:19,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538625237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:19,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756478203] [2021-06-05 21:35:19,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:19,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:35:19,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:35:19,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:19,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:19,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:35:20,212 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 282 [2021-06-05 21:35:20,445 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 280 [2021-06-05 21:35:20,615 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 276 [2021-06-05 21:35:20,979 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 352 [2021-06-05 21:35:22,168 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 315 [2021-06-05 21:35:22,343 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 356 [2021-06-05 21:35:22,547 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 367 [2021-06-05 21:35:22,776 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 732 DAG size of output: 386 [2021-06-05 21:35:23,002 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 732 DAG size of output: 386 [2021-06-05 21:35:23,250 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 737 DAG size of output: 391 [2021-06-05 21:35:23,450 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 330 [2021-06-05 21:35:23,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:23,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:23,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:23,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:35:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:23,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756478203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:23,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:23,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:35:23,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550502669] [2021-06-05 21:35:23,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:35:23,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:23,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:35:23,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:35:23,803 INFO L87 Difference]: Start difference. First operand 3155 states and 10038 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:24,167 INFO L93 Difference]: Finished difference Result 3260 states and 10216 transitions. [2021-06-05 21:35:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:35:24,168 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:24,171 INFO L225 Difference]: With dead ends: 3260 [2021-06-05 21:35:24,171 INFO L226 Difference]: Without dead ends: 3251 [2021-06-05 21:35:24,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:35:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-05 21:35:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 3158. [2021-06-05 21:35:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.1821349382324993) internal successors, (10046), 3157 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 10046 transitions. [2021-06-05 21:35:24,206 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 10046 transitions. Word has length 20 [2021-06-05 21:35:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:24,206 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 10046 transitions. [2021-06-05 21:35:24,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 10046 transitions. [2021-06-05 21:35:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:24,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:24,208 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:24,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32793,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:24,409 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash 853983754, now seen corresponding path program 246 times [2021-06-05 21:35:24,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:24,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230193371] [2021-06-05 21:35:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:24,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:24,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230193371] [2021-06-05 21:35:24,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230193371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:24,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846661203] [2021-06-05 21:35:24,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:24,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:35:24,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:35:24,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:24,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846661203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:24,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:24,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:35:24,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373893471] [2021-06-05 21:35:24,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:35:24,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:24,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:35:24,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:35:24,536 INFO L87 Difference]: Start difference. First operand 3158 states and 10046 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:24,636 INFO L93 Difference]: Finished difference Result 3782 states and 11476 transitions. [2021-06-05 21:35:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:35:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:24,640 INFO L225 Difference]: With dead ends: 3782 [2021-06-05 21:35:24,640 INFO L226 Difference]: Without dead ends: 3782 [2021-06-05 21:35:24,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-06-05 21:35:24,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 3158. [2021-06-05 21:35:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.1821349382324993) internal successors, (10046), 3157 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 10046 transitions. [2021-06-05 21:35:24,676 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 10046 transitions. Word has length 20 [2021-06-05 21:35:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:24,676 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 10046 transitions. [2021-06-05 21:35:24,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 10046 transitions. [2021-06-05 21:35:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:24,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:24,679 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:24,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33222 [2021-06-05 21:35:24,879 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1336798777, now seen corresponding path program 247 times [2021-06-05 21:35:24,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:24,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518897716] [2021-06-05 21:35:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:24,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:24,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518897716] [2021-06-05 21:35:24,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518897716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:24,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007968297] [2021-06-05 21:35:24,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:25,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:35:25,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:25,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:25,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:35:26,267 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 358 [2021-06-05 21:35:26,430 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 358 [2021-06-05 21:35:26,655 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 370 [2021-06-05 21:35:26,898 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 413 [2021-06-05 21:35:27,597 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 372 [2021-06-05 21:35:28,330 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 325 [2021-06-05 21:35:28,547 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 402 [2021-06-05 21:35:28,860 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 503 [2021-06-05 21:35:29,172 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 503 [2021-06-05 21:35:29,616 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 644 DAG size of output: 521 [2021-06-05 21:35:30,018 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 412 [2021-06-05 21:35:30,188 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 350 [2021-06-05 21:35:30,335 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 268 [2021-06-05 21:35:30,873 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 223 [2021-06-05 21:35:30,979 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 223 [2021-06-05 21:35:31,099 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 229 [2021-06-05 21:35:31,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:31,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:31,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:31,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:35:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:31,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007968297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:31,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:31,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:35:31,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381117959] [2021-06-05 21:35:31,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:35:31,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:31,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:35:31,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:35:31,506 INFO L87 Difference]: Start difference. First operand 3158 states and 10046 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:31,846 INFO L93 Difference]: Finished difference Result 3264 states and 10240 transitions. [2021-06-05 21:35:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:35:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:31,849 INFO L225 Difference]: With dead ends: 3264 [2021-06-05 21:35:31,850 INFO L226 Difference]: Without dead ends: 3257 [2021-06-05 21:35:31,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:35:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-06-05 21:35:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3161. [2021-06-05 21:35:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 3.1825949367088606) internal successors, (10057), 3160 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 10057 transitions. [2021-06-05 21:35:31,883 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 10057 transitions. Word has length 20 [2021-06-05 21:35:31,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:31,883 INFO L482 AbstractCegarLoop]: Abstraction has 3161 states and 10057 transitions. [2021-06-05 21:35:31,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 10057 transitions. [2021-06-05 21:35:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:31,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:31,885 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:32,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33223,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:32,086 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:32,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1830772426, now seen corresponding path program 248 times [2021-06-05 21:35:32,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:32,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353383479] [2021-06-05 21:35:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:32,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:32,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353383479] [2021-06-05 21:35:32,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353383479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:32,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019347389] [2021-06-05 21:35:32,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:32,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:35:32,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:32,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:35:32,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:32,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019347389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:32,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:32,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:35:32,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268858431] [2021-06-05 21:35:32,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:35:32,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:32,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:35:32,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:35:32,198 INFO L87 Difference]: Start difference. First operand 3161 states and 10057 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:32,280 INFO L93 Difference]: Finished difference Result 3795 states and 11521 transitions. [2021-06-05 21:35:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:35:32,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:32,283 INFO L225 Difference]: With dead ends: 3795 [2021-06-05 21:35:32,283 INFO L226 Difference]: Without dead ends: 3795 [2021-06-05 21:35:32,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-05 21:35:32,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 3140. [2021-06-05 21:35:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.1815864925135395) internal successors, (9987), 3139 states have internal predecessors, (9987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 9987 transitions. [2021-06-05 21:35:32,321 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 9987 transitions. Word has length 20 [2021-06-05 21:35:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:32,321 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 9987 transitions. [2021-06-05 21:35:32,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 9987 transitions. [2021-06-05 21:35:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:32,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:32,324 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:32,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33619 [2021-06-05 21:35:32,529 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1926339292, now seen corresponding path program 249 times [2021-06-05 21:35:32,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:32,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809804088] [2021-06-05 21:35:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:32,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:32,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809804088] [2021-06-05 21:35:32,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809804088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:32,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219118727] [2021-06-05 21:35:32,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:32,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:35:32,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:32,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:35:32,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:32,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219118727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:32,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:32,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:35:32,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484615384] [2021-06-05 21:35:32,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:35:32,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:32,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:35:32,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:35:32,641 INFO L87 Difference]: Start difference. First operand 3140 states and 9987 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:32,756 INFO L93 Difference]: Finished difference Result 4051 states and 12203 transitions. [2021-06-05 21:35:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:35:32,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:32,760 INFO L225 Difference]: With dead ends: 4051 [2021-06-05 21:35:32,760 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 21:35:32,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:35:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 21:35:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3009. [2021-06-05 21:35:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 3.171542553191489) internal successors, (9540), 3008 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 9540 transitions. [2021-06-05 21:35:32,795 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 9540 transitions. Word has length 20 [2021-06-05 21:35:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:32,795 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 9540 transitions. [2021-06-05 21:35:32,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 9540 transitions. [2021-06-05 21:35:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:32,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:32,797 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:33,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33620 [2021-06-05 21:35:33,001 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:33,001 INFO L82 PathProgramCache]: Analyzing trace with hash -393864147, now seen corresponding path program 250 times [2021-06-05 21:35:33,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:33,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679552171] [2021-06-05 21:35:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:33,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:33,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679552171] [2021-06-05 21:35:33,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679552171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:33,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451512825] [2021-06-05 21:35:33,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:33,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:35:33,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:33,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:35:33,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:33,437 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 21:35:33,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:33,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:35:34,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:34,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:34,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:34,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:35:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:34,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451512825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:34,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:34,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:35:34,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116924322] [2021-06-05 21:35:34,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:35:34,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:34,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:35:34,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:35:34,387 INFO L87 Difference]: Start difference. First operand 3009 states and 9540 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:34,923 INFO L93 Difference]: Finished difference Result 3118 states and 9737 transitions. [2021-06-05 21:35:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:35:34,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:34,927 INFO L225 Difference]: With dead ends: 3118 [2021-06-05 21:35:34,927 INFO L226 Difference]: Without dead ends: 3095 [2021-06-05 21:35:34,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 391.0ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:35:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-06-05 21:35:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 3011. [2021-06-05 21:35:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 3.167441860465116) internal successors, (9534), 3010 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 9534 transitions. [2021-06-05 21:35:34,960 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 9534 transitions. Word has length 20 [2021-06-05 21:35:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:34,960 INFO L482 AbstractCegarLoop]: Abstraction has 3011 states and 9534 transitions. [2021-06-05 21:35:34,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:34,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 9534 transitions. [2021-06-05 21:35:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:34,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:34,962 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:35,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33621 [2021-06-05 21:35:35,162 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:35,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1511860465, now seen corresponding path program 251 times [2021-06-05 21:35:35,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:35,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934392172] [2021-06-05 21:35:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:35,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:35,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934392172] [2021-06-05 21:35:35,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934392172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:35,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440263113] [2021-06-05 21:35:35,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:35,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:35:35,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:35,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 21:35:35,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:35,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:35,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:35:36,811 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 252 [2021-06-05 21:35:36,967 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 252 [2021-06-05 21:35:37,114 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 258 [2021-06-05 21:35:38,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:38,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:38,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:38,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:35:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:38,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440263113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:38,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:38,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:35:38,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139071786] [2021-06-05 21:35:38,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:35:38,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:38,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:35:38,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:35:38,049 INFO L87 Difference]: Start difference. First operand 3011 states and 9534 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:38,345 INFO L93 Difference]: Finished difference Result 3095 states and 9704 transitions. [2021-06-05 21:35:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:35:38,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:38,349 INFO L225 Difference]: With dead ends: 3095 [2021-06-05 21:35:38,349 INFO L226 Difference]: Without dead ends: 3090 [2021-06-05 21:35:38,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:35:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2021-06-05 21:35:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 3011. [2021-06-05 21:35:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 3.167441860465116) internal successors, (9534), 3010 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 9534 transitions. [2021-06-05 21:35:38,382 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 9534 transitions. Word has length 20 [2021-06-05 21:35:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:38,383 INFO L482 AbstractCegarLoop]: Abstraction has 3011 states and 9534 transitions. [2021-06-05 21:35:38,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 9534 transitions. [2021-06-05 21:35:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:38,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:38,385 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:38,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33775 [2021-06-05 21:35:38,585 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:38,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1121121017, now seen corresponding path program 252 times [2021-06-05 21:35:38,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:38,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163095406] [2021-06-05 21:35:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:38,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:38,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163095406] [2021-06-05 21:35:38,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163095406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:38,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409422717] [2021-06-05 21:35:38,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:38,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:35:38,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:38,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:35:38,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:39,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:39,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:35:39,614 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 266 [2021-06-05 21:35:39,740 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-06-05 21:35:39,890 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-06-05 21:35:40,038 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 288 [2021-06-05 21:35:40,394 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 369 [2021-06-05 21:35:40,763 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 332 [2021-06-05 21:35:40,905 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 269 [2021-06-05 21:35:41,568 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 243 [2021-06-05 21:35:41,748 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 310 [2021-06-05 21:35:41,929 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 329 [2021-06-05 21:35:42,716 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 257 [2021-06-05 21:35:42,863 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 332 [2021-06-05 21:35:43,153 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 469 [2021-06-05 21:35:43,659 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 554 [2021-06-05 21:35:44,143 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 554 [2021-06-05 21:35:44,699 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 1053 DAG size of output: 561 [2021-06-05 21:35:44,870 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 305 [2021-06-05 21:35:45,231 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 341 [2021-06-05 21:35:45,345 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 250 [2021-06-05 21:35:46,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:46,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:46,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:46,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:35:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:46,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409422717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:46,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:46,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:35:46,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498624997] [2021-06-05 21:35:46,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:35:46,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:35:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:35:46,027 INFO L87 Difference]: Start difference. First operand 3011 states and 9534 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:46,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:46,374 INFO L93 Difference]: Finished difference Result 3110 states and 9713 transitions. [2021-06-05 21:35:46,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:35:46,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:46,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:46,377 INFO L225 Difference]: With dead ends: 3110 [2021-06-05 21:35:46,377 INFO L226 Difference]: Without dead ends: 3101 [2021-06-05 21:35:46,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 325.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:35:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-05 21:35:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 3010. [2021-06-05 21:35:46,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.1665004985044867) internal successors, (9528), 3009 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 9528 transitions. [2021-06-05 21:35:46,411 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 9528 transitions. Word has length 20 [2021-06-05 21:35:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:46,411 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 9528 transitions. [2021-06-05 21:35:46,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 9528 transitions. [2021-06-05 21:35:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:46,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:46,413 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:46,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34134 [2021-06-05 21:35:46,614 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:46,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:46,614 INFO L82 PathProgramCache]: Analyzing trace with hash -187657308, now seen corresponding path program 253 times [2021-06-05 21:35:46,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:46,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700319156] [2021-06-05 21:35:46,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:46,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:46,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700319156] [2021-06-05 21:35:46,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700319156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:46,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726626241] [2021-06-05 21:35:46,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:35:46,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:35:46,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726626241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:46,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:46,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:35:46,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261212057] [2021-06-05 21:35:46,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:35:46,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:46,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:35:46,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:35:46,714 INFO L87 Difference]: Start difference. First operand 3010 states and 9528 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:46,772 INFO L93 Difference]: Finished difference Result 3282 states and 10018 transitions. [2021-06-05 21:35:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:35:46,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:46,775 INFO L225 Difference]: With dead ends: 3282 [2021-06-05 21:35:46,775 INFO L226 Difference]: Without dead ends: 3282 [2021-06-05 21:35:46,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:35:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-06-05 21:35:46,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3032. [2021-06-05 21:35:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.167601451666117) internal successors, (9601), 3031 states have internal predecessors, (9601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 9601 transitions. [2021-06-05 21:35:46,809 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 9601 transitions. Word has length 20 [2021-06-05 21:35:46,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:46,809 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 9601 transitions. [2021-06-05 21:35:46,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:46,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 9601 transitions. [2021-06-05 21:35:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:46,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:46,811 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:47,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34552,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:47,012 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2046450186, now seen corresponding path program 254 times [2021-06-05 21:35:47,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:47,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379055296] [2021-06-05 21:35:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:47,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:47,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379055296] [2021-06-05 21:35:47,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379055296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:47,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019297775] [2021-06-05 21:35:47,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:47,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:35:47,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:47,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:35:47,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:47,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019297775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:47,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:47,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:35:47,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13510564] [2021-06-05 21:35:47,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:35:47,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:35:47,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:35:47,112 INFO L87 Difference]: Start difference. First operand 3032 states and 9601 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:47,189 INFO L93 Difference]: Finished difference Result 3444 states and 10441 transitions. [2021-06-05 21:35:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:35:47,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:47,192 INFO L225 Difference]: With dead ends: 3444 [2021-06-05 21:35:47,192 INFO L226 Difference]: Without dead ends: 3444 [2021-06-05 21:35:47,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2021-06-05 21:35:47,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3015. [2021-06-05 21:35:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.1648971466489715) internal successors, (9539), 3014 states have internal predecessors, (9539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 9539 transitions. [2021-06-05 21:35:47,228 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 9539 transitions. Word has length 20 [2021-06-05 21:35:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:47,228 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 9539 transitions. [2021-06-05 21:35:47,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 9539 transitions. [2021-06-05 21:35:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:47,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:47,230 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:47,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34553 [2021-06-05 21:35:47,431 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:47,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:47,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1710661532, now seen corresponding path program 255 times [2021-06-05 21:35:47,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:47,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467238149] [2021-06-05 21:35:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:47,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:47,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467238149] [2021-06-05 21:35:47,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467238149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:47,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433964054] [2021-06-05 21:35:47,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:47,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:35:47,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:47,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:35:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:47,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433964054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:47,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:47,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:35:47,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000301252] [2021-06-05 21:35:47,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:35:47,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:35:47,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:35:47,541 INFO L87 Difference]: Start difference. First operand 3015 states and 9539 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:47,647 INFO L93 Difference]: Finished difference Result 3807 states and 11446 transitions. [2021-06-05 21:35:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:35:47,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:47,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:47,651 INFO L225 Difference]: With dead ends: 3807 [2021-06-05 21:35:47,651 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 21:35:47,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:35:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 21:35:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2940. [2021-06-05 21:35:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.159918339571283) internal successors, (9287), 2939 states have internal predecessors, (9287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9287 transitions. [2021-06-05 21:35:47,686 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9287 transitions. Word has length 20 [2021-06-05 21:35:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:47,686 INFO L482 AbstractCegarLoop]: Abstraction has 2940 states and 9287 transitions. [2021-06-05 21:35:47,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9287 transitions. [2021-06-05 21:35:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:47,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:47,688 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:47,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34554 [2021-06-05 21:35:47,889 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:47,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2077959498, now seen corresponding path program 256 times [2021-06-05 21:35:47,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:47,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18341007] [2021-06-05 21:35:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:47,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:47,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18341007] [2021-06-05 21:35:47,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18341007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:47,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288864631] [2021-06-05 21:35:47,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:47,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:35:47,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:35:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:48,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288864631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:48,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:48,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:35:48,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450058030] [2021-06-05 21:35:48,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:35:48,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:48,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:35:48,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:35:48,024 INFO L87 Difference]: Start difference. First operand 2940 states and 9287 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:48,171 INFO L93 Difference]: Finished difference Result 4596 states and 14016 transitions. [2021-06-05 21:35:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:35:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:48,176 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 21:35:48,176 INFO L226 Difference]: Without dead ends: 4596 [2021-06-05 21:35:48,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:35:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-06-05 21:35:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 3707. [2021-06-05 21:35:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3707 states, 3706 states have (on average 3.1813275769023206) internal successors, (11790), 3706 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3707 states to 3707 states and 11790 transitions. [2021-06-05 21:35:48,222 INFO L78 Accepts]: Start accepts. Automaton has 3707 states and 11790 transitions. Word has length 20 [2021-06-05 21:35:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:48,222 INFO L482 AbstractCegarLoop]: Abstraction has 3707 states and 11790 transitions. [2021-06-05 21:35:48,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3707 states and 11790 transitions. [2021-06-05 21:35:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:48,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:48,225 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:48,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34555,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:48,425 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:48,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2063705743, now seen corresponding path program 257 times [2021-06-05 21:35:48,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:48,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253612071] [2021-06-05 21:35:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:35:48,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:48,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253612071] [2021-06-05 21:35:48,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253612071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:48,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722392622] [2021-06-05 21:35:48,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:48,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:35:48,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:48,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:35:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:48,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:48,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:35:49,520 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 286 [2021-06-05 21:35:49,717 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 284 [2021-06-05 21:35:49,936 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 305 [2021-06-05 21:35:50,076 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 212 [2021-06-05 21:35:50,193 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 278 [2021-06-05 21:35:50,592 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 258 [2021-06-05 21:35:50,703 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 268 [2021-06-05 21:35:50,837 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 191 [2021-06-05 21:35:51,421 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 256 [2021-06-05 21:35:51,663 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 267 [2021-06-05 21:35:51,877 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 267 [2021-06-05 21:35:52,114 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 272 [2021-06-05 21:35:52,290 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 316 [2021-06-05 21:35:52,398 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 199 [2021-06-05 21:35:53,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:53,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:53,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:53,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:35:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:53,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722392622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:53,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:53,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 21:35:53,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302209312] [2021-06-05 21:35:53,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:35:53,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:35:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:35:53,236 INFO L87 Difference]: Start difference. First operand 3707 states and 11790 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:53,500 INFO L93 Difference]: Finished difference Result 3745 states and 11853 transitions. [2021-06-05 21:35:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:35:53,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:35:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:53,503 INFO L225 Difference]: With dead ends: 3745 [2021-06-05 21:35:53,503 INFO L226 Difference]: Without dead ends: 3721 [2021-06-05 21:35:53,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:35:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-06-05 21:35:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3708. [2021-06-05 21:35:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 3.1810089020771515) internal successors, (11792), 3707 states have internal predecessors, (11792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 11792 transitions. [2021-06-05 21:35:53,544 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 11792 transitions. Word has length 20 [2021-06-05 21:35:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:53,544 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 11792 transitions. [2021-06-05 21:35:53,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 11792 transitions. [2021-06-05 21:35:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:35:53,546 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:53,546 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:53,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34556 [2021-06-05 21:35:53,747 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash 875393611, now seen corresponding path program 258 times [2021-06-05 21:35:53,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:53,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622207951] [2021-06-05 21:35:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:53,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:53,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622207951] [2021-06-05 21:35:53,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622207951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:53,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666958467] [2021-06-05 21:35:53,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:53,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:35:53,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:53,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:35:53,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:54,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:54,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:35:54,833 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 278 [2021-06-05 21:35:55,115 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 329 [2021-06-05 21:35:55,225 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 262 [2021-06-05 21:35:55,458 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 293 [2021-06-05 21:35:56,297 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 237 [2021-06-05 21:35:56,445 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 281 [2021-06-05 21:35:56,690 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 416 [2021-06-05 21:35:56,979 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 471 [2021-06-05 21:35:57,243 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 471 [2021-06-05 21:35:57,539 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 476 [2021-06-05 21:35:57,888 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 525 [2021-06-05 21:35:58,482 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 477 [2021-06-05 21:35:59,125 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 281 [2021-06-05 21:35:59,234 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 281 [2021-06-05 21:35:59,356 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 283 [2021-06-05 21:35:59,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:59,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:59,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:59,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:35:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:59,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666958467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:59,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:59,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:35:59,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283523183] [2021-06-05 21:35:59,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:35:59,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:59,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:35:59,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:35:59,662 INFO L87 Difference]: Start difference. First operand 3708 states and 11792 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:00,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:00,126 INFO L93 Difference]: Finished difference Result 3819 states and 12002 transitions. [2021-06-05 21:36:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:36:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:00,130 INFO L225 Difference]: With dead ends: 3819 [2021-06-05 21:36:00,130 INFO L226 Difference]: Without dead ends: 3798 [2021-06-05 21:36:00,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:36:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-05 21:36:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3706. [2021-06-05 21:36:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 3705 states have (on average 3.1813765182186233) internal successors, (11787), 3705 states have internal predecessors, (11787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 11787 transitions. [2021-06-05 21:36:00,193 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 11787 transitions. Word has length 20 [2021-06-05 21:36:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:00,193 INFO L482 AbstractCegarLoop]: Abstraction has 3706 states and 11787 transitions. [2021-06-05 21:36:00,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 11787 transitions. [2021-06-05 21:36:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:00,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:00,195 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:00,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34845 [2021-06-05 21:36:00,396 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:00,397 INFO L82 PathProgramCache]: Analyzing trace with hash 452803937, now seen corresponding path program 259 times [2021-06-05 21:36:00,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:00,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950711265] [2021-06-05 21:36:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:00,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:00,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950711265] [2021-06-05 21:36:00,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950711265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:00,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365653608] [2021-06-05 21:36:00,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:00,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:00,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:00,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:00,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:01,730 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 218 [2021-06-05 21:36:01,845 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 245 [2021-06-05 21:36:02,672 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 253 [2021-06-05 21:36:03,397 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 211 [2021-06-05 21:36:03,550 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 261 [2021-06-05 21:36:03,762 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 267 [2021-06-05 21:36:03,945 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 267 [2021-06-05 21:36:04,148 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 272 [2021-06-05 21:36:04,279 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 255 [2021-06-05 21:36:04,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:04,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:04,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:04,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:04,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365653608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:04,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:04,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:36:04,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298683887] [2021-06-05 21:36:04,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:36:04,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:04,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:36:04,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:36:04,539 INFO L87 Difference]: Start difference. First operand 3706 states and 11787 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:05,025 INFO L93 Difference]: Finished difference Result 3787 states and 11914 transitions. [2021-06-05 21:36:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:36:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:05,028 INFO L225 Difference]: With dead ends: 3787 [2021-06-05 21:36:05,029 INFO L226 Difference]: Without dead ends: 3758 [2021-06-05 21:36:05,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:36:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2021-06-05 21:36:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3704. [2021-06-05 21:36:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.179044018363489) internal successors, (11772), 3703 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11772 transitions. [2021-06-05 21:36:05,072 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11772 transitions. Word has length 20 [2021-06-05 21:36:05,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:05,072 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11772 transitions. [2021-06-05 21:36:05,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11772 transitions. [2021-06-05 21:36:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:05,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:05,074 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:05,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35236 [2021-06-05 21:36:05,275 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:05,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:05,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1936438747, now seen corresponding path program 260 times [2021-06-05 21:36:05,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:05,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018735692] [2021-06-05 21:36:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:05,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018735692] [2021-06-05 21:36:05,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018735692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710875359] [2021-06-05 21:36:05,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:05,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:05,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:05,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:05,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:05,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:06,449 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 354 [2021-06-05 21:36:07,121 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 403 [2021-06-05 21:36:08,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:08,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:08,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:08,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:08,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710875359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:08,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:08,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:36:08,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050871272] [2021-06-05 21:36:08,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:36:08,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:08,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:36:08,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:08,337 INFO L87 Difference]: Start difference. First operand 3704 states and 11772 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:08,735 INFO L93 Difference]: Finished difference Result 3820 states and 11980 transitions. [2021-06-05 21:36:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:36:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:08,739 INFO L225 Difference]: With dead ends: 3820 [2021-06-05 21:36:08,739 INFO L226 Difference]: Without dead ends: 3801 [2021-06-05 21:36:08,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:36:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-06-05 21:36:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3704. [2021-06-05 21:36:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.177153659195247) internal successors, (11765), 3703 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11765 transitions. [2021-06-05 21:36:08,786 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11765 transitions. Word has length 20 [2021-06-05 21:36:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:08,786 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11765 transitions. [2021-06-05 21:36:08,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11765 transitions. [2021-06-05 21:36:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:08,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:08,789 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:08,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35601 [2021-06-05 21:36:08,989 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:08,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1306449377, now seen corresponding path program 261 times [2021-06-05 21:36:08,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:08,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122062456] [2021-06-05 21:36:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:09,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:09,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122062456] [2021-06-05 21:36:09,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122062456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:09,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766356107] [2021-06-05 21:36:09,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:09,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:36:09,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:09,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:09,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:09,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:09,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:10,207 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 315 [2021-06-05 21:36:11,072 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 281 [2021-06-05 21:36:11,193 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 274 [2021-06-05 21:36:12,169 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 252 [2021-06-05 21:36:12,366 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 332 [2021-06-05 21:36:12,868 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 442 [2021-06-05 21:36:13,214 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 442 [2021-06-05 21:36:13,592 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 449 [2021-06-05 21:36:14,109 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 432 [2021-06-05 21:36:14,335 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 229 [2021-06-05 21:36:15,305 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 288 [2021-06-05 21:36:15,430 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 294 [2021-06-05 21:36:15,555 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 294 [2021-06-05 21:36:15,688 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 299 [2021-06-05 21:36:15,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:15,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:15,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:15,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:15,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766356107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:15,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:15,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:36:15,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215871462] [2021-06-05 21:36:15,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:36:15,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:36:15,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:15,824 INFO L87 Difference]: Start difference. First operand 3704 states and 11765 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:16,157 INFO L93 Difference]: Finished difference Result 3872 states and 12169 transitions. [2021-06-05 21:36:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:36:16,158 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:16,162 INFO L225 Difference]: With dead ends: 3872 [2021-06-05 21:36:16,162 INFO L226 Difference]: Without dead ends: 3867 [2021-06-05 21:36:16,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:36:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-06-05 21:36:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3704. [2021-06-05 21:36:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.177153659195247) internal successors, (11765), 3703 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11765 transitions. [2021-06-05 21:36:16,204 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11765 transitions. Word has length 20 [2021-06-05 21:36:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:16,204 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11765 transitions. [2021-06-05 21:36:16,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11765 transitions. [2021-06-05 21:36:16,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:16,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:16,206 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:16,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35895,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:16,407 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1269922247, now seen corresponding path program 262 times [2021-06-05 21:36:16,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:16,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039552217] [2021-06-05 21:36:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:16,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:16,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039552217] [2021-06-05 21:36:16,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039552217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:16,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712477384] [2021-06-05 21:36:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:16,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:16,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:16,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:16,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:16,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:16,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:18,123 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 205 [2021-06-05 21:36:18,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:18,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:18,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:18,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:18,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712477384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:18,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:18,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:36:18,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829132621] [2021-06-05 21:36:18,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:36:18,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:18,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:36:18,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:18,710 INFO L87 Difference]: Start difference. First operand 3704 states and 11765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:19,129 INFO L93 Difference]: Finished difference Result 3769 states and 11875 transitions. [2021-06-05 21:36:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:36:19,130 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:19,134 INFO L225 Difference]: With dead ends: 3769 [2021-06-05 21:36:19,134 INFO L226 Difference]: Without dead ends: 3760 [2021-06-05 21:36:19,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:19,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2021-06-05 21:36:19,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3700. [2021-06-05 21:36:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 3.176263855095972) internal successors, (11749), 3699 states have internal predecessors, (11749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 11749 transitions. [2021-06-05 21:36:19,175 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 11749 transitions. Word has length 20 [2021-06-05 21:36:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:19,175 INFO L482 AbstractCegarLoop]: Abstraction has 3700 states and 11749 transitions. [2021-06-05 21:36:19,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:19,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 11749 transitions. [2021-06-05 21:36:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:19,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:19,178 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:19,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36523 [2021-06-05 21:36:19,379 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:19,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:19,379 INFO L82 PathProgramCache]: Analyzing trace with hash 142526154, now seen corresponding path program 263 times [2021-06-05 21:36:19,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:19,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479803631] [2021-06-05 21:36:19,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:19,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:19,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479803631] [2021-06-05 21:36:19,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479803631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:19,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612925316] [2021-06-05 21:36:19,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:19,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:36:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:19,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612925316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:19,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:19,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:36:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644386236] [2021-06-05 21:36:19,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:36:19,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:19,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:36:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:36:19,480 INFO L87 Difference]: Start difference. First operand 3700 states and 11749 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:19,543 INFO L93 Difference]: Finished difference Result 3959 states and 12236 transitions. [2021-06-05 21:36:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:36:19,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:19,547 INFO L225 Difference]: With dead ends: 3959 [2021-06-05 21:36:19,547 INFO L226 Difference]: Without dead ends: 3959 [2021-06-05 21:36:19,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-05 21:36:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3733. [2021-06-05 21:36:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.177652733118971) internal successors, (11859), 3732 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 11859 transitions. [2021-06-05 21:36:19,593 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 11859 transitions. Word has length 20 [2021-06-05 21:36:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:19,594 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 11859 transitions. [2021-06-05 21:36:19,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 11859 transitions. [2021-06-05 21:36:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:19,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:19,596 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:19,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36817,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:19,797 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash 680381732, now seen corresponding path program 264 times [2021-06-05 21:36:19,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:19,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68491866] [2021-06-05 21:36:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:19,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:19,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68491866] [2021-06-05 21:36:19,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68491866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:19,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332481432] [2021-06-05 21:36:19,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:19,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:36:19,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:19,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:19,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:19,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332481432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:19,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:19,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:36:19,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397143079] [2021-06-05 21:36:19,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:36:19,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:19,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:36:19,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:36:19,902 INFO L87 Difference]: Start difference. First operand 3733 states and 11859 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:19,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:19,998 INFO L93 Difference]: Finished difference Result 4198 states and 12875 transitions. [2021-06-05 21:36:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:36:19,998 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:20,003 INFO L225 Difference]: With dead ends: 4198 [2021-06-05 21:36:20,003 INFO L226 Difference]: Without dead ends: 4198 [2021-06-05 21:36:20,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:36:20,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-06-05 21:36:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3725. [2021-06-05 21:36:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.1766917293233083) internal successors, (11830), 3724 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 11830 transitions. [2021-06-05 21:36:20,048 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 11830 transitions. Word has length 20 [2021-06-05 21:36:20,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:20,048 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 11830 transitions. [2021-06-05 21:36:20,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 11830 transitions. [2021-06-05 21:36:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:20,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:20,050 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:20,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36818 [2021-06-05 21:36:20,251 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:20,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash 174035466, now seen corresponding path program 265 times [2021-06-05 21:36:20,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:20,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170842108] [2021-06-05 21:36:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:20,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:20,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170842108] [2021-06-05 21:36:20,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170842108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:20,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108777357] [2021-06-05 21:36:20,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:20,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:20,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:20,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108777357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:20,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:20,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:36:20,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373320616] [2021-06-05 21:36:20,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:36:20,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:20,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:36:20,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:36:20,357 INFO L87 Difference]: Start difference. First operand 3725 states and 11830 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:20,486 INFO L93 Difference]: Finished difference Result 4548 states and 13998 transitions. [2021-06-05 21:36:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:36:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:20,492 INFO L225 Difference]: With dead ends: 4548 [2021-06-05 21:36:20,492 INFO L226 Difference]: Without dead ends: 4548 [2021-06-05 21:36:20,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:36:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-06-05 21:36:20,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 3857. [2021-06-05 21:36:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 3.171421161825726) internal successors, (12229), 3856 states have internal predecessors, (12229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 12229 transitions. [2021-06-05 21:36:20,543 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 12229 transitions. Word has length 20 [2021-06-05 21:36:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:20,543 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 12229 transitions. [2021-06-05 21:36:20,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 12229 transitions. [2021-06-05 21:36:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:20,546 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:20,546 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:20,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36819,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:20,747 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:20,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1657170404, now seen corresponding path program 266 times [2021-06-05 21:36:20,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:20,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497217785] [2021-06-05 21:36:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:20,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:20,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497217785] [2021-06-05 21:36:20,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497217785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:20,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426979646] [2021-06-05 21:36:20,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:20,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:20,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:20,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:20,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426979646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:20,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:20,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:36:20,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26096686] [2021-06-05 21:36:20,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:36:20,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:20,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:36:20,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:36:20,855 INFO L87 Difference]: Start difference. First operand 3857 states and 12229 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:21,030 INFO L93 Difference]: Finished difference Result 5083 states and 15588 transitions. [2021-06-05 21:36:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:36:21,030 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:21,035 INFO L225 Difference]: With dead ends: 5083 [2021-06-05 21:36:21,035 INFO L226 Difference]: Without dead ends: 5083 [2021-06-05 21:36:21,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:36:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-06-05 21:36:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 3996. [2021-06-05 21:36:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 3.17171464330413) internal successors, (12671), 3995 states have internal predecessors, (12671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 12671 transitions. [2021-06-05 21:36:21,082 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 12671 transitions. Word has length 20 [2021-06-05 21:36:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:21,082 INFO L482 AbstractCegarLoop]: Abstraction has 3996 states and 12671 transitions. [2021-06-05 21:36:21,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 12671 transitions. [2021-06-05 21:36:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:21,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:21,085 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:21,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36820 [2021-06-05 21:36:21,285 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash -319341737, now seen corresponding path program 267 times [2021-06-05 21:36:21,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:21,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449342152] [2021-06-05 21:36:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:21,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:21,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449342152] [2021-06-05 21:36:21,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449342152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:21,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499095769] [2021-06-05 21:36:21,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:21,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:36:21,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:21,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:21,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:21,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:21,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:22,260 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 268 [2021-06-05 21:36:22,366 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 268 [2021-06-05 21:36:22,493 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 279 [2021-06-05 21:36:22,615 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 351 [2021-06-05 21:36:22,750 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 305 [2021-06-05 21:36:23,449 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 261 [2021-06-05 21:36:24,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:24,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:24,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:24,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:24,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499095769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:24,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:24,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 21:36:24,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310156746] [2021-06-05 21:36:24,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:36:24,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:24,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:36:24,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:36:24,198 INFO L87 Difference]: Start difference. First operand 3996 states and 12671 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:24,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:24,603 INFO L93 Difference]: Finished difference Result 4050 states and 12777 transitions. [2021-06-05 21:36:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:36:24,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:24,607 INFO L225 Difference]: With dead ends: 4050 [2021-06-05 21:36:24,607 INFO L226 Difference]: Without dead ends: 4040 [2021-06-05 21:36:24,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2021-06-05 21:36:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 3997. [2021-06-05 21:36:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3996 states have (on average 3.171921921921922) internal successors, (12675), 3996 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 12675 transitions. [2021-06-05 21:36:24,652 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 12675 transitions. Word has length 20 [2021-06-05 21:36:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:24,652 INFO L482 AbstractCegarLoop]: Abstraction has 3997 states and 12675 transitions. [2021-06-05 21:36:24,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 12675 transitions. [2021-06-05 21:36:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:24,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:24,655 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:24,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36821 [2021-06-05 21:36:24,855 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:24,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1918399472, now seen corresponding path program 268 times [2021-06-05 21:36:24,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:24,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752099984] [2021-06-05 21:36:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:24,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:24,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752099984] [2021-06-05 21:36:24,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752099984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:24,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197407470] [2021-06-05 21:36:24,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:24,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:24,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:24,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:24,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:24,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197407470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:24,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:24,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:36:24,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099647452] [2021-06-05 21:36:24,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:36:24,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:24,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:36:24,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:36:24,961 INFO L87 Difference]: Start difference. First operand 3997 states and 12675 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:25,089 INFO L93 Difference]: Finished difference Result 4890 states and 15000 transitions. [2021-06-05 21:36:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:36:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:25,094 INFO L225 Difference]: With dead ends: 4890 [2021-06-05 21:36:25,094 INFO L226 Difference]: Without dead ends: 4890 [2021-06-05 21:36:25,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:36:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4890 states. [2021-06-05 21:36:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4890 to 2217. [2021-06-05 21:36:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.1164259927797833) internal successors, (6906), 2216 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6906 transitions. [2021-06-05 21:36:25,128 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6906 transitions. Word has length 20 [2021-06-05 21:36:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:25,128 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6906 transitions. [2021-06-05 21:36:25,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6906 transitions. [2021-06-05 21:36:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:25,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:25,130 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:25,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37026,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:25,330 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:25,331 INFO L82 PathProgramCache]: Analyzing trace with hash -893432886, now seen corresponding path program 269 times [2021-06-05 21:36:25,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:25,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929733096] [2021-06-05 21:36:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:25,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:25,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929733096] [2021-06-05 21:36:25,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929733096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:25,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643507286] [2021-06-05 21:36:25,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:25,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:36:25,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:25,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:25,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643507286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:25,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:25,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:36:25,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094218738] [2021-06-05 21:36:25,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:36:25,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:25,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:36:25,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:36:25,439 INFO L87 Difference]: Start difference. First operand 2217 states and 6906 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:25,617 INFO L93 Difference]: Finished difference Result 3552 states and 10616 transitions. [2021-06-05 21:36:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:36:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:25,621 INFO L225 Difference]: With dead ends: 3552 [2021-06-05 21:36:25,621 INFO L226 Difference]: Without dead ends: 3552 [2021-06-05 21:36:25,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:36:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2021-06-05 21:36:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 2210. [2021-06-05 21:36:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 3.122227252150294) internal successors, (6897), 2209 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 6897 transitions. [2021-06-05 21:36:25,647 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 6897 transitions. Word has length 20 [2021-06-05 21:36:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:25,648 INFO L482 AbstractCegarLoop]: Abstraction has 2210 states and 6897 transitions. [2021-06-05 21:36:25,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 6897 transitions. [2021-06-05 21:36:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:25,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:25,649 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:25,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37027 [2021-06-05 21:36:25,850 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:25,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1917147897, now seen corresponding path program 270 times [2021-06-05 21:36:25,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:25,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028688546] [2021-06-05 21:36:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:25,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:25,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028688546] [2021-06-05 21:36:25,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028688546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:25,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132716141] [2021-06-05 21:36:25,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:25,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:36:25,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:25,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:25,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:26,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:26,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:27,044 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 240 [2021-06-05 21:36:27,271 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 287 [2021-06-05 21:36:27,374 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 237 [2021-06-05 21:36:28,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:28,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:28,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:28,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:28,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132716141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:28,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:28,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:36:28,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385023513] [2021-06-05 21:36:28,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:36:28,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:28,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:36:28,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:28,016 INFO L87 Difference]: Start difference. First operand 2210 states and 6897 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:28,297 INFO L93 Difference]: Finished difference Result 2235 states and 6947 transitions. [2021-06-05 21:36:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:36:28,297 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:28,300 INFO L225 Difference]: With dead ends: 2235 [2021-06-05 21:36:28,300 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 21:36:28,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 21:36:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2208. [2021-06-05 21:36:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.122791119166289) internal successors, (6892), 2207 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6892 transitions. [2021-06-05 21:36:28,321 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6892 transitions. Word has length 20 [2021-06-05 21:36:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:28,321 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6892 transitions. [2021-06-05 21:36:28,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6892 transitions. [2021-06-05 21:36:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:28,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:28,323 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:28,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37028,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:28,524 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1281932618, now seen corresponding path program 271 times [2021-06-05 21:36:28,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:28,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851825237] [2021-06-05 21:36:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:28,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:28,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851825237] [2021-06-05 21:36:28,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851825237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:28,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388366777] [2021-06-05 21:36:28,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:28,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:28,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:28,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388366777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:28,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:28,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:28,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195373840] [2021-06-05 21:36:28,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:28,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:28,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:28,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:28,635 INFO L87 Difference]: Start difference. First operand 2208 states and 6892 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:28,753 INFO L93 Difference]: Finished difference Result 2603 states and 7643 transitions. [2021-06-05 21:36:28,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:36:28,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:28,755 INFO L225 Difference]: With dead ends: 2603 [2021-06-05 21:36:28,755 INFO L226 Difference]: Without dead ends: 2603 [2021-06-05 21:36:28,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:36:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-05 21:36:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1561. [2021-06-05 21:36:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.0724358974358976) internal successors, (4793), 1560 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4793 transitions. [2021-06-05 21:36:28,775 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4793 transitions. Word has length 20 [2021-06-05 21:36:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:28,775 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4793 transitions. [2021-06-05 21:36:28,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4793 transitions. [2021-06-05 21:36:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:28,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:28,776 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:28,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37319,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:28,977 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:28,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1529899740, now seen corresponding path program 272 times [2021-06-05 21:36:28,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:28,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551758804] [2021-06-05 21:36:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:29,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:29,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551758804] [2021-06-05 21:36:29,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551758804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:29,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310077771] [2021-06-05 21:36:29,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:29,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:29,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:29,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:29,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:29,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310077771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:29,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:29,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:29,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957700746] [2021-06-05 21:36:29,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:29,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:29,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:29,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:29,091 INFO L87 Difference]: Start difference. First operand 1561 states and 4793 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:29,266 INFO L93 Difference]: Finished difference Result 2319 states and 6788 transitions. [2021-06-05 21:36:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:36:29,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:29,268 INFO L225 Difference]: With dead ends: 2319 [2021-06-05 21:36:29,268 INFO L226 Difference]: Without dead ends: 2319 [2021-06-05 21:36:29,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:36:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-05 21:36:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1568. [2021-06-05 21:36:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.0855137204850034) internal successors, (4835), 1567 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 4835 transitions. [2021-06-05 21:36:29,287 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 4835 transitions. Word has length 20 [2021-06-05 21:36:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:29,287 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 4835 transitions. [2021-06-05 21:36:29,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 4835 transitions. [2021-06-05 21:36:29,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:29,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:29,288 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:29,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37320,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:29,489 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:29,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1497610378, now seen corresponding path program 273 times [2021-06-05 21:36:29,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:29,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581673983] [2021-06-05 21:36:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:29,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:29,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581673983] [2021-06-05 21:36:29,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581673983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:29,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371738448] [2021-06-05 21:36:29,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:29,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:36:29,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:29,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:29,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371738448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:29,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:29,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:29,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118329661] [2021-06-05 21:36:29,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:29,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:29,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:29,621 INFO L87 Difference]: Start difference. First operand 1568 states and 4835 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:29,835 INFO L93 Difference]: Finished difference Result 2424 states and 7063 transitions. [2021-06-05 21:36:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:29,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:29,838 INFO L225 Difference]: With dead ends: 2424 [2021-06-05 21:36:29,838 INFO L226 Difference]: Without dead ends: 2424 [2021-06-05 21:36:29,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:36:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-06-05 21:36:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1795. [2021-06-05 21:36:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.092530657748049) internal successors, (5548), 1794 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 5548 transitions. [2021-06-05 21:36:29,858 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 5548 transitions. Word has length 20 [2021-06-05 21:36:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:29,859 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 5548 transitions. [2021-06-05 21:36:29,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 5548 transitions. [2021-06-05 21:36:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:29,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:29,860 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:30,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37321,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:30,061 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:30,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2078632399, now seen corresponding path program 274 times [2021-06-05 21:36:30,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:30,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278881609] [2021-06-05 21:36:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:30,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:30,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278881609] [2021-06-05 21:36:30,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278881609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:30,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411781935] [2021-06-05 21:36:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:30,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:30,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:30,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:30,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:30,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:30,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:30,961 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 225 [2021-06-05 21:36:31,475 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 261 [2021-06-05 21:36:31,589 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 266 [2021-06-05 21:36:31,700 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 303 [2021-06-05 21:36:32,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:32,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:32,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:32,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:32,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411781935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:32,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:32,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:36:32,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600765129] [2021-06-05 21:36:32,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:36:32,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:32,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:36:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:32,442 INFO L87 Difference]: Start difference. First operand 1795 states and 5548 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:32,821 INFO L93 Difference]: Finished difference Result 1927 states and 5783 transitions. [2021-06-05 21:36:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:36:32,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:32,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:32,823 INFO L225 Difference]: With dead ends: 1927 [2021-06-05 21:36:32,823 INFO L226 Difference]: Without dead ends: 1917 [2021-06-05 21:36:32,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-06-05 21:36:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1800. [2021-06-05 21:36:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.093941078376876) internal successors, (5566), 1799 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 5566 transitions. [2021-06-05 21:36:32,842 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 5566 transitions. Word has length 20 [2021-06-05 21:36:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:32,842 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 5566 transitions. [2021-06-05 21:36:32,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 5566 transitions. [2021-06-05 21:36:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:32,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:32,843 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:33,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37322,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:33,044 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1005776894, now seen corresponding path program 275 times [2021-06-05 21:36:33,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:33,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588086010] [2021-06-05 21:36:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:33,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:33,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588086010] [2021-06-05 21:36:33,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588086010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:33,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090618241] [2021-06-05 21:36:33,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:33,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:36:33,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:33,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:33,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090618241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:33,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:33,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:33,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320707397] [2021-06-05 21:36:33,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:33,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:33,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:33,157 INFO L87 Difference]: Start difference. First operand 1800 states and 5566 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:33,313 INFO L93 Difference]: Finished difference Result 2241 states and 6581 transitions. [2021-06-05 21:36:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:36:33,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:33,315 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 21:36:33,315 INFO L226 Difference]: Without dead ends: 2241 [2021-06-05 21:36:33,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:36:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-06-05 21:36:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1485. [2021-06-05 21:36:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.0808625336927222) internal successors, (4572), 1484 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 4572 transitions. [2021-06-05 21:36:33,332 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 4572 transitions. Word has length 20 [2021-06-05 21:36:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:33,332 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 4572 transitions. [2021-06-05 21:36:33,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:33,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 4572 transitions. [2021-06-05 21:36:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:33,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:33,334 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:33,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37547 [2021-06-05 21:36:33,534 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:33,534 INFO L82 PathProgramCache]: Analyzing trace with hash -261680284, now seen corresponding path program 276 times [2021-06-05 21:36:33,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:33,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316414205] [2021-06-05 21:36:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:33,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:33,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316414205] [2021-06-05 21:36:33,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316414205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:33,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168679161] [2021-06-05 21:36:33,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:33,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:36:33,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:33,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168679161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:33,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:33,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:33,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228769159] [2021-06-05 21:36:33,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:33,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:33,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:33,658 INFO L87 Difference]: Start difference. First operand 1485 states and 4572 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:33,898 INFO L93 Difference]: Finished difference Result 2226 states and 6445 transitions. [2021-06-05 21:36:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:36:33,899 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:33,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:33,901 INFO L225 Difference]: With dead ends: 2226 [2021-06-05 21:36:33,901 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 21:36:33,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:36:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 21:36:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1519. [2021-06-05 21:36:33,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.0843214756258233) internal successors, (4682), 1518 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4682 transitions. [2021-06-05 21:36:33,918 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4682 transitions. Word has length 20 [2021-06-05 21:36:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:33,918 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4682 transitions. [2021-06-05 21:36:33,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4682 transitions. [2021-06-05 21:36:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:33,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:33,919 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:34,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37548 [2021-06-05 21:36:34,120 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:34,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1932074553, now seen corresponding path program 277 times [2021-06-05 21:36:34,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:34,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752253539] [2021-06-05 21:36:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:34,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:34,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752253539] [2021-06-05 21:36:34,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752253539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:34,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599698283] [2021-06-05 21:36:34,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:34,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:34,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:34,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:34,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:35,156 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 286 [2021-06-05 21:36:35,260 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 286 [2021-06-05 21:36:35,379 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 293 [2021-06-05 21:36:35,541 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 362 [2021-06-05 21:36:36,393 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 276 [2021-06-05 21:36:36,549 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 330 [2021-06-05 21:36:36,704 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 330 [2021-06-05 21:36:36,966 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 334 [2021-06-05 21:36:37,253 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 369 [2021-06-05 21:36:37,494 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 224 [2021-06-05 21:36:38,045 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 229 [2021-06-05 21:36:38,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:38,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:38,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:38,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:38,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599698283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:38,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:38,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:36:38,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051945514] [2021-06-05 21:36:38,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:36:38,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:38,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:36:38,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:38,376 INFO L87 Difference]: Start difference. First operand 1519 states and 4682 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:38,627 INFO L93 Difference]: Finished difference Result 1555 states and 4757 transitions. [2021-06-05 21:36:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:36:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:38,630 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 21:36:38,630 INFO L226 Difference]: Without dead ends: 1550 [2021-06-05 21:36:38,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:36:38,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-06-05 21:36:38,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1520. [2021-06-05 21:36:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.0849242922975644) internal successors, (4686), 1519 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 4686 transitions. [2021-06-05 21:36:38,645 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 4686 transitions. Word has length 20 [2021-06-05 21:36:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:38,645 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 4686 transitions. [2021-06-05 21:36:38,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 4686 transitions. [2021-06-05 21:36:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:38,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:38,646 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:38,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37549 [2021-06-05 21:36:38,847 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:38,847 INFO L82 PathProgramCache]: Analyzing trace with hash -998610844, now seen corresponding path program 278 times [2021-06-05 21:36:38,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:38,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461930781] [2021-06-05 21:36:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:38,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:38,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461930781] [2021-06-05 21:36:38,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461930781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:38,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150172868] [2021-06-05 21:36:38,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:38,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:38,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:38,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:38,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:36:38,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150172868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:38,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:38,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:36:38,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881333793] [2021-06-05 21:36:38,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:36:38,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:38,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:36:38,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:36:38,949 INFO L87 Difference]: Start difference. First operand 1520 states and 4686 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:39,023 INFO L93 Difference]: Finished difference Result 1775 states and 5123 transitions. [2021-06-05 21:36:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:36:39,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:39,025 INFO L225 Difference]: With dead ends: 1775 [2021-06-05 21:36:39,025 INFO L226 Difference]: Without dead ends: 1775 [2021-06-05 21:36:39,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-05 21:36:39,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1531. [2021-06-05 21:36:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.08562091503268) internal successors, (4721), 1530 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4721 transitions. [2021-06-05 21:36:39,041 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4721 transitions. Word has length 20 [2021-06-05 21:36:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:39,041 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4721 transitions. [2021-06-05 21:36:39,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4721 transitions. [2021-06-05 21:36:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:39,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:39,042 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:39,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37970,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:39,243 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1235496650, now seen corresponding path program 279 times [2021-06-05 21:36:39,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:39,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136712287] [2021-06-05 21:36:39,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:39,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:39,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136712287] [2021-06-05 21:36:39,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136712287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:39,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427841407] [2021-06-05 21:36:39,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:39,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:36:39,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:39,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:39,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:39,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427841407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:39,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:39,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:36:39,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710250290] [2021-06-05 21:36:39,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:36:39,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:39,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:36:39,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:36:39,345 INFO L87 Difference]: Start difference. First operand 1531 states and 4721 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:39,436 INFO L93 Difference]: Finished difference Result 1802 states and 5179 transitions. [2021-06-05 21:36:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:36:39,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:39,438 INFO L225 Difference]: With dead ends: 1802 [2021-06-05 21:36:39,438 INFO L226 Difference]: Without dead ends: 1802 [2021-06-05 21:36:39,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:36:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-06-05 21:36:39,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1476. [2021-06-05 21:36:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.079322033898305) internal successors, (4542), 1475 states have internal predecessors, (4542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4542 transitions. [2021-06-05 21:36:39,454 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4542 transitions. Word has length 20 [2021-06-05 21:36:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:39,454 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4542 transitions. [2021-06-05 21:36:39,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4542 transitions. [2021-06-05 21:36:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:39,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:39,455 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:39,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37971,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:39,656 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:39,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1773352228, now seen corresponding path program 280 times [2021-06-05 21:36:39,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:39,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921605065] [2021-06-05 21:36:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:39,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:39,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921605065] [2021-06-05 21:36:39,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921605065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:39,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010184518] [2021-06-05 21:36:39,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:39,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:39,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:39,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:39,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010184518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:39,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:39,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:36:39,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090256938] [2021-06-05 21:36:39,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:36:39,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:39,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:36:39,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:36:39,767 INFO L87 Difference]: Start difference. First operand 1476 states and 4542 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:39,863 INFO L93 Difference]: Finished difference Result 1732 states and 4957 transitions. [2021-06-05 21:36:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:36:39,863 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:39,865 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 21:36:39,865 INFO L226 Difference]: Without dead ends: 1732 [2021-06-05 21:36:39,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:36:39,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-06-05 21:36:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1312. [2021-06-05 21:36:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.0671243325705566) internal successors, (4021), 1311 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4021 transitions. [2021-06-05 21:36:39,879 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4021 transitions. Word has length 20 [2021-06-05 21:36:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:39,879 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 4021 transitions. [2021-06-05 21:36:39,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4021 transitions. [2021-06-05 21:36:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:39,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:39,881 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:40,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37972,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:40,081 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:40,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1544826396, now seen corresponding path program 281 times [2021-06-05 21:36:40,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:40,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669811395] [2021-06-05 21:36:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:40,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669811395] [2021-06-05 21:36:40,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669811395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406611749] [2021-06-05 21:36:40,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:40,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:36:40,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:40,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:40,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:40,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406611749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:40,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:40,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:40,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553292735] [2021-06-05 21:36:40,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:40,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:40,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:40,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:40,197 INFO L87 Difference]: Start difference. First operand 1312 states and 4021 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:40,321 INFO L93 Difference]: Finished difference Result 1787 states and 5216 transitions. [2021-06-05 21:36:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:36:40,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:40,323 INFO L225 Difference]: With dead ends: 1787 [2021-06-05 21:36:40,323 INFO L226 Difference]: Without dead ends: 1787 [2021-06-05 21:36:40,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:36:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-06-05 21:36:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1538. [2021-06-05 21:36:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.0709173715029277) internal successors, (4720), 1537 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4720 transitions. [2021-06-05 21:36:40,339 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4720 transitions. Word has length 20 [2021-06-05 21:36:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:40,339 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4720 transitions. [2021-06-05 21:36:40,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4720 transitions. [2021-06-05 21:36:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:40,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:40,340 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:40,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37973 [2021-06-05 21:36:40,541 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1482683722, now seen corresponding path program 282 times [2021-06-05 21:36:40,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:40,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090429274] [2021-06-05 21:36:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:40,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:40,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090429274] [2021-06-05 21:36:40,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090429274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:40,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472287564] [2021-06-05 21:36:40,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:40,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:36:40,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:40,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:40,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:40,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472287564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:40,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:40,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:40,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101683856] [2021-06-05 21:36:40,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:40,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:40,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:40,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:40,666 INFO L87 Difference]: Start difference. First operand 1538 states and 4720 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:40,872 INFO L93 Difference]: Finished difference Result 1812 states and 5269 transitions. [2021-06-05 21:36:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:36:40,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:40,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:40,874 INFO L225 Difference]: With dead ends: 1812 [2021-06-05 21:36:40,874 INFO L226 Difference]: Without dead ends: 1812 [2021-06-05 21:36:40,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:36:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-05 21:36:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1587. [2021-06-05 21:36:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.0687263556116013) internal successors, (4867), 1586 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4867 transitions. [2021-06-05 21:36:40,891 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4867 transitions. Word has length 20 [2021-06-05 21:36:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:40,891 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 4867 transitions. [2021-06-05 21:36:40,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:40,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4867 transitions. [2021-06-05 21:36:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:40,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:40,892 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:41,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37974 [2021-06-05 21:36:41,093 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:41,093 INFO L82 PathProgramCache]: Analyzing trace with hash 846216868, now seen corresponding path program 283 times [2021-06-05 21:36:41,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:41,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486326895] [2021-06-05 21:36:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:41,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:41,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486326895] [2021-06-05 21:36:41,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486326895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:41,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995795936] [2021-06-05 21:36:41,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:41,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:41,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995795936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:41,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:41,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:41,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798469196] [2021-06-05 21:36:41,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:41,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:41,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:41,214 INFO L87 Difference]: Start difference. First operand 1587 states and 4867 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:41,440 INFO L93 Difference]: Finished difference Result 1938 states and 5602 transitions. [2021-06-05 21:36:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:36:41,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:41,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:41,442 INFO L225 Difference]: With dead ends: 1938 [2021-06-05 21:36:41,442 INFO L226 Difference]: Without dead ends: 1938 [2021-06-05 21:36:41,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:36:41,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-06-05 21:36:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1604. [2021-06-05 21:36:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.0679975046787273) internal successors, (4918), 1603 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 4918 transitions. [2021-06-05 21:36:41,459 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 4918 transitions. Word has length 20 [2021-06-05 21:36:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:41,459 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 4918 transitions. [2021-06-05 21:36:41,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 4918 transitions. [2021-06-05 21:36:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:41,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:41,461 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:41,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37975 [2021-06-05 21:36:41,662 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash -782068073, now seen corresponding path program 284 times [2021-06-05 21:36:41,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:41,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085091955] [2021-06-05 21:36:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:41,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:41,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085091955] [2021-06-05 21:36:41,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085091955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:41,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648984268] [2021-06-05 21:36:41,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:41,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:41,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:41,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:41,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:42,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:42,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:42,725 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 303 [2021-06-05 21:36:42,856 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 325 [2021-06-05 21:36:42,987 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 325 [2021-06-05 21:36:43,144 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 336 [2021-06-05 21:36:43,279 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 288 [2021-06-05 21:36:43,409 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 327 [2021-06-05 21:36:43,543 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 297 [2021-06-05 21:36:44,073 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 270 [2021-06-05 21:36:44,176 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 270 [2021-06-05 21:36:44,294 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 240 [2021-06-05 21:36:45,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:45,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:45,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:45,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:45,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648984268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:45,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:45,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:36:45,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831537074] [2021-06-05 21:36:45,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:36:45,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:45,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:36:45,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:36:45,019 INFO L87 Difference]: Start difference. First operand 1604 states and 4918 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:45,580 INFO L93 Difference]: Finished difference Result 1808 states and 5373 transitions. [2021-06-05 21:36:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:36:45,581 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:45,583 INFO L225 Difference]: With dead ends: 1808 [2021-06-05 21:36:45,583 INFO L226 Difference]: Without dead ends: 1798 [2021-06-05 21:36:45,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:36:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-06-05 21:36:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1653. [2021-06-05 21:36:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.087772397094431) internal successors, (5101), 1652 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5101 transitions. [2021-06-05 21:36:45,600 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5101 transitions. Word has length 20 [2021-06-05 21:36:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:45,601 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5101 transitions. [2021-06-05 21:36:45,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5101 transitions. [2021-06-05 21:36:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:45,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:45,602 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:45,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37976 [2021-06-05 21:36:45,803 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash -395866959, now seen corresponding path program 285 times [2021-06-05 21:36:45,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:45,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112266752] [2021-06-05 21:36:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:45,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112266752] [2021-06-05 21:36:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112266752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493446810] [2021-06-05 21:36:45,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:45,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:36:45,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:45,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:45,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:46,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:46,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:47,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:47,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:47,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:47,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:47,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493446810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:47,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:47,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 21:36:47,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546233427] [2021-06-05 21:36:47,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:36:47,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:47,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:36:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:36:47,193 INFO L87 Difference]: Start difference. First operand 1653 states and 5101 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:47,698 INFO L93 Difference]: Finished difference Result 1770 states and 5320 transitions. [2021-06-05 21:36:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:36:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:47,700 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 21:36:47,700 INFO L226 Difference]: Without dead ends: 1765 [2021-06-05 21:36:47,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:36:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-05 21:36:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1653. [2021-06-05 21:36:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.087772397094431) internal successors, (5101), 1652 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5101 transitions. [2021-06-05 21:36:47,718 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5101 transitions. Word has length 20 [2021-06-05 21:36:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:47,718 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5101 transitions. [2021-06-05 21:36:47,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5101 transitions. [2021-06-05 21:36:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:47,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:47,719 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:47,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38314 [2021-06-05 21:36:47,920 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1057130742, now seen corresponding path program 286 times [2021-06-05 21:36:47,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:47,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179240492] [2021-06-05 21:36:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:47,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:47,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179240492] [2021-06-05 21:36:47,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179240492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:47,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429250341] [2021-06-05 21:36:47,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:48,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:48,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:48,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:48,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:48,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429250341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:48,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:48,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:36:48,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108896836] [2021-06-05 21:36:48,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:36:48,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:48,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:36:48,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:36:48,044 INFO L87 Difference]: Start difference. First operand 1653 states and 5101 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:48,120 INFO L93 Difference]: Finished difference Result 1988 states and 5715 transitions. [2021-06-05 21:36:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:36:48,120 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:48,122 INFO L225 Difference]: With dead ends: 1988 [2021-06-05 21:36:48,122 INFO L226 Difference]: Without dead ends: 1988 [2021-06-05 21:36:48,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-06-05 21:36:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1661. [2021-06-05 21:36:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.0897590361445784) internal successors, (5129), 1660 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5129 transitions. [2021-06-05 21:36:48,141 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5129 transitions. Word has length 20 [2021-06-05 21:36:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:48,141 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5129 transitions. [2021-06-05 21:36:48,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5129 transitions. [2021-06-05 21:36:48,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:48,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:48,142 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:48,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38486,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:48,343 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash 757652935, now seen corresponding path program 287 times [2021-06-05 21:36:48,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:48,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799616917] [2021-06-05 21:36:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:48,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:48,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799616917] [2021-06-05 21:36:48,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799616917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:48,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793830807] [2021-06-05 21:36:48,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:48,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:36:48,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:36:48,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:48,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:48,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:49,606 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 259 [2021-06-05 21:36:50,048 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 255 [2021-06-05 21:36:50,188 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 214 [2021-06-05 21:36:50,611 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 336 [2021-06-05 21:36:50,912 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 375 [2021-06-05 21:36:51,176 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 375 [2021-06-05 21:36:51,467 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 380 [2021-06-05 21:36:51,758 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 478 [2021-06-05 21:36:51,977 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 322 [2021-06-05 21:36:52,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:36:52,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:52,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:36:52,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:36:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:52,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793830807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:52,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:52,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:36:52,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787176611] [2021-06-05 21:36:52,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:36:52,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:52,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:36:52,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:52,544 INFO L87 Difference]: Start difference. First operand 1661 states and 5129 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:52,891 INFO L93 Difference]: Finished difference Result 1764 states and 5293 transitions. [2021-06-05 21:36:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:36:52,891 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:52,893 INFO L225 Difference]: With dead ends: 1764 [2021-06-05 21:36:52,893 INFO L226 Difference]: Without dead ends: 1737 [2021-06-05 21:36:52,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:36:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-06-05 21:36:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1661. [2021-06-05 21:36:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.075903614457831) internal successors, (5106), 1660 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5106 transitions. [2021-06-05 21:36:52,910 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5106 transitions. Word has length 20 [2021-06-05 21:36:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:52,910 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5106 transitions. [2021-06-05 21:36:52,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5106 transitions. [2021-06-05 21:36:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:52,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:52,912 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:53,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38487,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:53,113 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:53,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1034884042, now seen corresponding path program 288 times [2021-06-05 21:36:53,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:53,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033367044] [2021-06-05 21:36:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:53,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:53,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033367044] [2021-06-05 21:36:53,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033367044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:53,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289655601] [2021-06-05 21:36:53,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:53,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:36:53,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:53,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:53,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:53,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289655601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:53,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:53,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:53,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985856373] [2021-06-05 21:36:53,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:53,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:53,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:53,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:53,238 INFO L87 Difference]: Start difference. First operand 1661 states and 5106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:53,458 INFO L93 Difference]: Finished difference Result 2203 states and 6445 transitions. [2021-06-05 21:36:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:36:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:53,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:53,460 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 21:36:53,461 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 21:36:53,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:36:53,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 21:36:53,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1708. [2021-06-05 21:36:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.074985354422964) internal successors, (5249), 1707 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5249 transitions. [2021-06-05 21:36:53,479 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5249 transitions. Word has length 20 [2021-06-05 21:36:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:53,479 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5249 transitions. [2021-06-05 21:36:53,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5249 transitions. [2021-06-05 21:36:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:53,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:53,480 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:53,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38706 [2021-06-05 21:36:53,681 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:53,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1515719248, now seen corresponding path program 289 times [2021-06-05 21:36:53,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:53,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072709321] [2021-06-05 21:36:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:53,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:53,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072709321] [2021-06-05 21:36:53,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072709321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:53,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513933687] [2021-06-05 21:36:53,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:53,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:53,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513933687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:53,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:53,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:53,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256874524] [2021-06-05 21:36:53,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:53,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:53,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:53,798 INFO L87 Difference]: Start difference. First operand 1708 states and 5249 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:53,983 INFO L93 Difference]: Finished difference Result 1957 states and 5754 transitions. [2021-06-05 21:36:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:36:53,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:53,985 INFO L225 Difference]: With dead ends: 1957 [2021-06-05 21:36:53,985 INFO L226 Difference]: Without dead ends: 1957 [2021-06-05 21:36:53,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:53,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-06-05 21:36:54,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1714. [2021-06-05 21:36:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.0758902510215997) internal successors, (5269), 1713 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5269 transitions. [2021-06-05 21:36:54,004 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5269 transitions. Word has length 20 [2021-06-05 21:36:54,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:54,004 INFO L482 AbstractCegarLoop]: Abstraction has 1714 states and 5269 transitions. [2021-06-05 21:36:54,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5269 transitions. [2021-06-05 21:36:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:54,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:54,006 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:54,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38707,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:54,207 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:54,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:54,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2142781194, now seen corresponding path program 290 times [2021-06-05 21:36:54,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:54,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658298479] [2021-06-05 21:36:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:54,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:54,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658298479] [2021-06-05 21:36:54,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658298479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:54,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045122756] [2021-06-05 21:36:54,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:54,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:54,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:54,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:36:54,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:54,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045122756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:54,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:54,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:36:54,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421953] [2021-06-05 21:36:54,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:54,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:54,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:54,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:54,329 INFO L87 Difference]: Start difference. First operand 1714 states and 5269 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:54,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:54,549 INFO L93 Difference]: Finished difference Result 2009 states and 5887 transitions. [2021-06-05 21:36:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:36:54,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:36:54,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:54,551 INFO L225 Difference]: With dead ends: 2009 [2021-06-05 21:36:54,551 INFO L226 Difference]: Without dead ends: 2009 [2021-06-05 21:36:54,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:36:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-06-05 21:36:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1728. [2021-06-05 21:36:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 3.0752750434279097) internal successors, (5311), 1727 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 5311 transitions. [2021-06-05 21:36:54,569 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 5311 transitions. Word has length 20 [2021-06-05 21:36:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:54,569 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 5311 transitions. [2021-06-05 21:36:54,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 5311 transitions. [2021-06-05 21:36:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:36:54,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:54,571 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:54,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38708,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:54,771 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:54,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1900166407, now seen corresponding path program 291 times [2021-06-05 21:36:54,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:54,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715313976] [2021-06-05 21:36:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:54,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:54,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715313976] [2021-06-05 21:36:54,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715313976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:54,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516446758] [2021-06-05 21:36:54,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:54,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:36:54,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:54,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 21:36:54,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:55,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:36:55,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:36:57,709 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 338 [2021-06-05 21:36:58,011 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 779 DAG size of output: 474 [2021-06-05 21:36:58,378 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 524 [2021-06-05 21:36:58,845 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 575 [2021-06-05 21:36:59,331 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 575 [2021-06-05 21:36:59,839 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 580 [2021-06-05 21:37:00,481 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 697 [2021-06-05 21:37:00,798 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 342 [2021-06-05 21:37:01,695 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 493 [2021-06-05 21:37:01,943 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 440 [2021-06-05 21:37:02,449 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 363 [2021-06-05 21:37:02,780 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 431 [2021-06-05 21:37:02,980 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 443 [2021-06-05 21:37:03,236 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 498 [2021-06-05 21:37:03,577 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 492 [2021-06-05 21:37:03,889 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 492 [2021-06-05 21:37:04,297 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 496 [2021-06-05 21:37:04,508 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 340 [2021-06-05 21:37:05,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:37:05,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:37:05,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:37:05,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:37:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:05,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516446758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:05,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:05,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:37:05,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211199077] [2021-06-05 21:37:05,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:37:05,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:05,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:37:05,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:05,153 INFO L87 Difference]: Start difference. First operand 1728 states and 5311 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:05,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:05,548 INFO L93 Difference]: Finished difference Result 1933 states and 5906 transitions. [2021-06-05 21:37:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:05,549 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:37:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:05,551 INFO L225 Difference]: With dead ends: 1933 [2021-06-05 21:37:05,551 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 21:37:05,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:37:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 21:37:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1883. [2021-06-05 21:37:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.081296493092455) internal successors, (5799), 1882 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 5799 transitions. [2021-06-05 21:37:05,570 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 5799 transitions. Word has length 20 [2021-06-05 21:37:05,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:05,570 INFO L482 AbstractCegarLoop]: Abstraction has 1883 states and 5799 transitions. [2021-06-05 21:37:05,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:05,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 5799 transitions. [2021-06-05 21:37:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:37:05,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:05,572 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:05,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38709 [2021-06-05 21:37:05,772 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:05,772 INFO L82 PathProgramCache]: Analyzing trace with hash -800073397, now seen corresponding path program 292 times [2021-06-05 21:37:05,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:05,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453983317] [2021-06-05 21:37:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:05,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:05,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453983317] [2021-06-05 21:37:05,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453983317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:05,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022930603] [2021-06-05 21:37:05,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:05,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:05,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:37:05,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:06,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:37:06,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:37:07,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:37:07,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:37:07,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:37:07,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:37:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:07,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022930603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:07,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:07,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:37:07,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671648795] [2021-06-05 21:37:07,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:37:07,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:07,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:37:07,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:07,142 INFO L87 Difference]: Start difference. First operand 1883 states and 5799 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:07,801 INFO L93 Difference]: Finished difference Result 1955 states and 5932 transitions. [2021-06-05 21:37:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:37:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:37:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:07,803 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 21:37:07,803 INFO L226 Difference]: Without dead ends: 1950 [2021-06-05 21:37:07,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 369.2ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:37:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-06-05 21:37:07,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1883. [2021-06-05 21:37:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.081296493092455) internal successors, (5799), 1882 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 5799 transitions. [2021-06-05 21:37:07,822 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 5799 transitions. Word has length 20 [2021-06-05 21:37:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:07,822 INFO L482 AbstractCegarLoop]: Abstraction has 1883 states and 5799 transitions. [2021-06-05 21:37:07,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 5799 transitions. [2021-06-05 21:37:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:37:07,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:07,824 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:08,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39426,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:08,025 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1461337180, now seen corresponding path program 293 times [2021-06-05 21:37:08,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:08,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694547736] [2021-06-05 21:37:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:08,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:08,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694547736] [2021-06-05 21:37:08,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694547736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:08,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481782905] [2021-06-05 21:37:08,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:08,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:08,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:37:08,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:08,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481782905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:08,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:08,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:08,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424045698] [2021-06-05 21:37:08,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:08,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:08,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:08,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:08,129 INFO L87 Difference]: Start difference. First operand 1883 states and 5799 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:08,216 INFO L93 Difference]: Finished difference Result 2214 states and 6381 transitions. [2021-06-05 21:37:08,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:37:08,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:37:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:08,219 INFO L225 Difference]: With dead ends: 2214 [2021-06-05 21:37:08,219 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 21:37:08,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 21:37:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1898. [2021-06-05 21:37:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 3.084343700579863) internal successors, (5851), 1897 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 5851 transitions. [2021-06-05 21:37:08,238 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 5851 transitions. Word has length 20 [2021-06-05 21:37:08,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:08,238 INFO L482 AbstractCegarLoop]: Abstraction has 1898 states and 5851 transitions. [2021-06-05 21:37:08,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:08,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 5851 transitions. [2021-06-05 21:37:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:37:08,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:08,240 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:08,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39600,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:08,441 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:08,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash 772770314, now seen corresponding path program 294 times [2021-06-05 21:37:08,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:08,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240500142] [2021-06-05 21:37:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:08,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:08,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240500142] [2021-06-05 21:37:08,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240500142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:08,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374988399] [2021-06-05 21:37:08,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:08,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:37:08,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:08,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:37:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:08,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374988399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:08,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:08,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:08,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887167046] [2021-06-05 21:37:08,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:08,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:08,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:08,544 INFO L87 Difference]: Start difference. First operand 1898 states and 5851 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:08,656 INFO L93 Difference]: Finished difference Result 2225 states and 6496 transitions. [2021-06-05 21:37:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:37:08,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:37:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:08,658 INFO L225 Difference]: With dead ends: 2225 [2021-06-05 21:37:08,658 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 21:37:08,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 21:37:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1963. [2021-06-05 21:37:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.0866462793068297) internal successors, (6056), 1962 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6056 transitions. [2021-06-05 21:37:08,678 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6056 transitions. Word has length 20 [2021-06-05 21:37:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:08,678 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 6056 transitions. [2021-06-05 21:37:08,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:08,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6056 transitions. [2021-06-05 21:37:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:37:08,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:08,680 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:08,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39601 [2021-06-05 21:37:08,890 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:08,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1310625892, now seen corresponding path program 295 times [2021-06-05 21:37:08,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:08,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221599587] [2021-06-05 21:37:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:08,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:08,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221599587] [2021-06-05 21:37:08,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221599587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:08,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993298722] [2021-06-05 21:37:08,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:08,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:37:08,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:09,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993298722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:09,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:09,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:37:09,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996060670] [2021-06-05 21:37:09,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:09,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:09,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:09,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:09,001 INFO L87 Difference]: Start difference. First operand 1963 states and 6056 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:09,126 INFO L93 Difference]: Finished difference Result 2251 states and 6550 transitions. [2021-06-05 21:37:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:37:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:37:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:09,129 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 21:37:09,129 INFO L226 Difference]: Without dead ends: 2251 [2021-06-05 21:37:09,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-05 21:37:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1967. [2021-06-05 21:37:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.084944048830112) internal successors, (6065), 1966 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:09,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6065 transitions. [2021-06-05 21:37:09,149 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6065 transitions. Word has length 20 [2021-06-05 21:37:09,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:09,149 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 6065 transitions. [2021-06-05 21:37:09,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6065 transitions. [2021-06-05 21:37:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:37:09,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:09,151 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:09,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39602 [2021-06-05 21:37:09,352 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:09,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2007552732, now seen corresponding path program 296 times [2021-06-05 21:37:09,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:09,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920765837] [2021-06-05 21:37:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:09,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:09,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920765837] [2021-06-05 21:37:09,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920765837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:09,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369087869] [2021-06-05 21:37:09,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:09,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:09,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:09,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:37:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:09,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369087869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:09,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:09,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:37:09,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937412212] [2021-06-05 21:37:09,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:09,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:09,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:09,465 INFO L87 Difference]: Start difference. First operand 1967 states and 6065 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:09,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:09,543 INFO L93 Difference]: Finished difference Result 2072 states and 6290 transitions. [2021-06-05 21:37:09,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:37:09,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:37:09,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:09,545 INFO L225 Difference]: With dead ends: 2072 [2021-06-05 21:37:09,545 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 21:37:09,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:37:09,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 21:37:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2004. [2021-06-05 21:37:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.0833749375936095) internal successors, (6176), 2003 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6176 transitions. [2021-06-05 21:37:09,564 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6176 transitions. Word has length 20 [2021-06-05 21:37:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:09,564 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 6176 transitions. [2021-06-05 21:37:09,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6176 transitions. [2021-06-05 21:37:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:37:09,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:09,566 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:09,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39603 [2021-06-05 21:37:09,766 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:09,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1019957386, now seen corresponding path program 297 times [2021-06-05 21:37:09,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:09,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146698559] [2021-06-05 21:37:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:09,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:09,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146698559] [2021-06-05 21:37:09,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146698559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:09,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659764393] [2021-06-05 21:37:09,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:09,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:37:09,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:37:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:09,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659764393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:09,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:09,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:09,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006089693] [2021-06-05 21:37:09,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:09,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:09,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:09,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:09,894 INFO L87 Difference]: Start difference. First operand 2004 states and 6176 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:10,037 INFO L93 Difference]: Finished difference Result 2124 states and 6392 transitions. [2021-06-05 21:37:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:37:10,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:37:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:10,039 INFO L225 Difference]: With dead ends: 2124 [2021-06-05 21:37:10,039 INFO L226 Difference]: Without dead ends: 2124 [2021-06-05 21:37:10,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-06-05 21:37:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2003. [2021-06-05 21:37:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.083416583416583) internal successors, (6173), 2002 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6173 transitions. [2021-06-05 21:37:10,059 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6173 transitions. Word has length 20 [2021-06-05 21:37:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:10,059 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6173 transitions. [2021-06-05 21:37:10,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6173 transitions. [2021-06-05 21:37:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:37:10,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:10,061 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:10,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39604 [2021-06-05 21:37:10,261 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 383490532, now seen corresponding path program 298 times [2021-06-05 21:37:10,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:10,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942295097] [2021-06-05 21:37:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:10,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:10,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942295097] [2021-06-05 21:37:10,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942295097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:10,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592544875] [2021-06-05 21:37:10,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:10,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:10,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:10,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:37:10,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:10,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592544875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:10,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:10,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160662448] [2021-06-05 21:37:10,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:10,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:10,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:10,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:10,381 INFO L87 Difference]: Start difference. First operand 2003 states and 6173 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:10,561 INFO L93 Difference]: Finished difference Result 2203 states and 6584 transitions. [2021-06-05 21:37:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:10,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:37:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:10,564 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 21:37:10,564 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 21:37:10,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:37:10,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 21:37:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2015. [2021-06-05 21:37:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.08291956305859) internal successors, (6209), 2014 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6209 transitions. [2021-06-05 21:37:10,584 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6209 transitions. Word has length 20 [2021-06-05 21:37:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:10,584 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 6209 transitions. [2021-06-05 21:37:10,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6209 transitions. [2021-06-05 21:37:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:37:10,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:10,586 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:10,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39605 [2021-06-05 21:37:10,786 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:10,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2127854538, now seen corresponding path program 299 times [2021-06-05 21:37:10,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:10,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001527509] [2021-06-05 21:37:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:10,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:10,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001527509] [2021-06-05 21:37:10,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001527509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:10,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653382958] [2021-06-05 21:37:10,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:10,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:10,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:37:10,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:10,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653382958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:10,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:10,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:10,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794623368] [2021-06-05 21:37:10,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:10,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:10,913 INFO L87 Difference]: Start difference. First operand 2015 states and 6209 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:11,108 INFO L93 Difference]: Finished difference Result 2375 states and 7049 transitions. [2021-06-05 21:37:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:37:11,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:37:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:11,110 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 21:37:11,110 INFO L226 Difference]: Without dead ends: 2375 [2021-06-05 21:37:11,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:37:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-06-05 21:37:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2034. [2021-06-05 21:37:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 3.0821446138711264) internal successors, (6266), 2033 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 6266 transitions. [2021-06-05 21:37:11,130 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 6266 transitions. Word has length 20 [2021-06-05 21:37:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:11,130 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 6266 transitions. [2021-06-05 21:37:11,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 6266 transitions. [2021-06-05 21:37:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:11,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:11,132 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:11,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39606,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:11,333 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 248568699, now seen corresponding path program 300 times [2021-06-05 21:37:11,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:11,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113647576] [2021-06-05 21:37:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:11,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:11,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113647576] [2021-06-05 21:37:11,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113647576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:11,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310011940] [2021-06-05 21:37:11,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:11,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:37:11,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:11,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:11,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:11,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310011940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:11,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:11,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:11,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118669059] [2021-06-05 21:37:11,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:11,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:11,472 INFO L87 Difference]: Start difference. First operand 2034 states and 6266 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:11,610 INFO L93 Difference]: Finished difference Result 2216 states and 6557 transitions. [2021-06-05 21:37:11,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:37:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:11,612 INFO L225 Difference]: With dead ends: 2216 [2021-06-05 21:37:11,612 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 21:37:11,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 21:37:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2020. [2021-06-05 21:37:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.0787518573551265) internal successors, (6216), 2019 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6216 transitions. [2021-06-05 21:37:11,633 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6216 transitions. Word has length 21 [2021-06-05 21:37:11,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:11,633 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 6216 transitions. [2021-06-05 21:37:11,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6216 transitions. [2021-06-05 21:37:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:11,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:11,635 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:11,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39607 [2021-06-05 21:37:11,835 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash 905361256, now seen corresponding path program 301 times [2021-06-05 21:37:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:11,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779098633] [2021-06-05 21:37:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:11,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:11,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779098633] [2021-06-05 21:37:11,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779098633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:11,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475843704] [2021-06-05 21:37:11,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:11,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:11,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:11,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475843704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:11,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:11,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:11,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689655927] [2021-06-05 21:37:11,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:11,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:11,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:11,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:11,971 INFO L87 Difference]: Start difference. First operand 2020 states and 6216 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:12,199 INFO L93 Difference]: Finished difference Result 2358 states and 6864 transitions. [2021-06-05 21:37:12,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:37:12,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:12,202 INFO L225 Difference]: With dead ends: 2358 [2021-06-05 21:37:12,202 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 21:37:12,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:37:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 21:37:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1996. [2021-06-05 21:37:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.0716791979949876) internal successors, (6128), 1995 states have internal predecessors, (6128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6128 transitions. [2021-06-05 21:37:12,224 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6128 transitions. Word has length 21 [2021-06-05 21:37:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:12,224 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6128 transitions. [2021-06-05 21:37:12,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6128 transitions. [2021-06-05 21:37:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:12,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:12,226 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:12,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39608 [2021-06-05 21:37:12,426 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:12,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1825157759, now seen corresponding path program 302 times [2021-06-05 21:37:12,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:12,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364650271] [2021-06-05 21:37:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:12,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:12,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364650271] [2021-06-05 21:37:12,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364650271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:12,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890206146] [2021-06-05 21:37:12,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:12,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:12,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:12,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:12,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:12,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890206146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:12,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:12,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:37:12,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997317193] [2021-06-05 21:37:12,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:12,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:12,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:12,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:12,560 INFO L87 Difference]: Start difference. First operand 1996 states and 6128 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:12,686 INFO L93 Difference]: Finished difference Result 2055 states and 6217 transitions. [2021-06-05 21:37:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:12,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:12,688 INFO L225 Difference]: With dead ends: 2055 [2021-06-05 21:37:12,688 INFO L226 Difference]: Without dead ends: 2051 [2021-06-05 21:37:12,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-05 21:37:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1996. [2021-06-05 21:37:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.069674185463659) internal successors, (6124), 1995 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6124 transitions. [2021-06-05 21:37:12,708 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6124 transitions. Word has length 21 [2021-06-05 21:37:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:12,708 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6124 transitions. [2021-06-05 21:37:12,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6124 transitions. [2021-06-05 21:37:12,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:12,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:12,710 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:12,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39609,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:12,911 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:12,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1163893976, now seen corresponding path program 303 times [2021-06-05 21:37:12,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:12,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179528736] [2021-06-05 21:37:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:12,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:12,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179528736] [2021-06-05 21:37:12,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179528736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:12,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863794509] [2021-06-05 21:37:12,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:12,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:37:12,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:13,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863794509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:13,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:13,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:37:13,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502602005] [2021-06-05 21:37:13,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:13,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:13,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:13,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:13,030 INFO L87 Difference]: Start difference. First operand 1996 states and 6124 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:13,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:13,100 INFO L93 Difference]: Finished difference Result 2326 states and 6716 transitions. [2021-06-05 21:37:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:37:13,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:13,102 INFO L225 Difference]: With dead ends: 2326 [2021-06-05 21:37:13,102 INFO L226 Difference]: Without dead ends: 2326 [2021-06-05 21:37:13,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:13,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-06-05 21:37:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1980. [2021-06-05 21:37:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.064679130874179) internal successors, (6065), 1979 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6065 transitions. [2021-06-05 21:37:13,126 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6065 transitions. Word has length 21 [2021-06-05 21:37:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:13,127 INFO L482 AbstractCegarLoop]: Abstraction has 1980 states and 6065 transitions. [2021-06-05 21:37:13,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6065 transitions. [2021-06-05 21:37:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:13,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:13,128 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:13,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39610 [2021-06-05 21:37:13,329 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1822635909, now seen corresponding path program 304 times [2021-06-05 21:37:13,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:13,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773538497] [2021-06-05 21:37:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:13,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:13,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773538497] [2021-06-05 21:37:13,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773538497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:13,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049478371] [2021-06-05 21:37:13,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:13,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:13,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:13,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049478371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:13,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:13,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:37:13,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788640582] [2021-06-05 21:37:13,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:13,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:13,445 INFO L87 Difference]: Start difference. First operand 1980 states and 6065 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:13,562 INFO L93 Difference]: Finished difference Result 2084 states and 6271 transitions. [2021-06-05 21:37:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:13,565 INFO L225 Difference]: With dead ends: 2084 [2021-06-05 21:37:13,565 INFO L226 Difference]: Without dead ends: 2076 [2021-06-05 21:37:13,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:37:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-06-05 21:37:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1988. [2021-06-05 21:37:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 3.06341217916457) internal successors, (6087), 1987 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 6087 transitions. [2021-06-05 21:37:13,585 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 6087 transitions. Word has length 21 [2021-06-05 21:37:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:13,585 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 6087 transitions. [2021-06-05 21:37:13,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:13,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 6087 transitions. [2021-06-05 21:37:13,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:13,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:13,587 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:13,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39611,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:13,788 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:13,788 INFO L82 PathProgramCache]: Analyzing trace with hash -865456514, now seen corresponding path program 305 times [2021-06-05 21:37:13,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:13,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479175298] [2021-06-05 21:37:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:13,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:13,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479175298] [2021-06-05 21:37:13,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479175298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:13,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779911354] [2021-06-05 21:37:13,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:13,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:37:13,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:13,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:13,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:13,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779911354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:13,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:13,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:37:13,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158848539] [2021-06-05 21:37:13,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:13,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:13,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:13,904 INFO L87 Difference]: Start difference. First operand 1988 states and 6087 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:13,991 INFO L93 Difference]: Finished difference Result 2431 states and 6990 transitions. [2021-06-05 21:37:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:37:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:13,994 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 21:37:13,994 INFO L226 Difference]: Without dead ends: 2431 [2021-06-05 21:37:13,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:13,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-05 21:37:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1991. [2021-06-05 21:37:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.063819095477387) internal successors, (6097), 1990 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 6097 transitions. [2021-06-05 21:37:14,016 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 6097 transitions. Word has length 21 [2021-06-05 21:37:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:14,016 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 6097 transitions. [2021-06-05 21:37:14,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 6097 transitions. [2021-06-05 21:37:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:14,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:14,018 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:14,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39612 [2021-06-05 21:37:14,218 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:14,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1059877375, now seen corresponding path program 306 times [2021-06-05 21:37:14,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:14,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16221508] [2021-06-05 21:37:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:14,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:14,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16221508] [2021-06-05 21:37:14,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16221508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:14,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202374488] [2021-06-05 21:37:14,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:14,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:37:14,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:14,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:14,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202374488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:14,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:14,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:14,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139199851] [2021-06-05 21:37:14,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:14,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:14,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:14,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:14,332 INFO L87 Difference]: Start difference. First operand 1991 states and 6097 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:14,451 INFO L93 Difference]: Finished difference Result 2098 states and 6296 transitions. [2021-06-05 21:37:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:14,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:14,453 INFO L225 Difference]: With dead ends: 2098 [2021-06-05 21:37:14,453 INFO L226 Difference]: Without dead ends: 2086 [2021-06-05 21:37:14,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-05 21:37:14,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1993. [2021-06-05 21:37:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 3.0607429718875503) internal successors, (6097), 1992 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 6097 transitions. [2021-06-05 21:37:14,474 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 6097 transitions. Word has length 21 [2021-06-05 21:37:14,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:14,474 INFO L482 AbstractCegarLoop]: Abstraction has 1993 states and 6097 transitions. [2021-06-05 21:37:14,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 6097 transitions. [2021-06-05 21:37:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:14,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:14,475 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:14,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39613 [2021-06-05 21:37:14,676 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:14,676 INFO L82 PathProgramCache]: Analyzing trace with hash 649187736, now seen corresponding path program 307 times [2021-06-05 21:37:14,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:14,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044768750] [2021-06-05 21:37:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:14,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:14,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044768750] [2021-06-05 21:37:14,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044768750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:14,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923970904] [2021-06-05 21:37:14,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:14,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:14,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923970904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:14,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:14,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:14,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907519223] [2021-06-05 21:37:14,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:14,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:14,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:14,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:14,788 INFO L87 Difference]: Start difference. First operand 1993 states and 6097 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:14,895 INFO L93 Difference]: Finished difference Result 2545 states and 7306 transitions. [2021-06-05 21:37:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:37:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:14,898 INFO L225 Difference]: With dead ends: 2545 [2021-06-05 21:37:14,898 INFO L226 Difference]: Without dead ends: 2545 [2021-06-05 21:37:14,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:37:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-06-05 21:37:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1996. [2021-06-05 21:37:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.0606516290726815) internal successors, (6106), 1995 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6106 transitions. [2021-06-05 21:37:14,922 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6106 transitions. Word has length 21 [2021-06-05 21:37:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:14,922 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6106 transitions. [2021-06-05 21:37:14,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6106 transitions. [2021-06-05 21:37:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:14,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:14,924 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:15,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39614 [2021-06-05 21:37:15,124 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:15,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:15,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1454406011, now seen corresponding path program 308 times [2021-06-05 21:37:15,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:15,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627135605] [2021-06-05 21:37:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:15,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:15,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627135605] [2021-06-05 21:37:15,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627135605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:15,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609182496] [2021-06-05 21:37:15,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:15,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:15,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:15,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:15,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:37:15,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609182496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:15,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:15,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:37:15,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172263918] [2021-06-05 21:37:15,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:37:15,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:37:15,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:37:15,227 INFO L87 Difference]: Start difference. First operand 1996 states and 6106 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:15,294 INFO L93 Difference]: Finished difference Result 2246 states and 6593 transitions. [2021-06-05 21:37:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:37:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:15,297 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 21:37:15,297 INFO L226 Difference]: Without dead ends: 2244 [2021-06-05 21:37:15,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-05 21:37:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2004. [2021-06-05 21:37:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.050424363454818) internal successors, (6110), 2003 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6110 transitions. [2021-06-05 21:37:15,318 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6110 transitions. Word has length 21 [2021-06-05 21:37:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:15,318 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 6110 transitions. [2021-06-05 21:37:15,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6110 transitions. [2021-06-05 21:37:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:15,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:15,320 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:15,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39615 [2021-06-05 21:37:15,520 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1535536296, now seen corresponding path program 309 times [2021-06-05 21:37:15,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:15,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542769920] [2021-06-05 21:37:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:15,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:15,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542769920] [2021-06-05 21:37:15,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542769920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:15,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731985341] [2021-06-05 21:37:15,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:15,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:15,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:15,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:15,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:37:15,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731985341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:15,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:15,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:37:15,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792106777] [2021-06-05 21:37:15,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:37:15,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:15,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:37:15,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:37:15,616 INFO L87 Difference]: Start difference. First operand 2004 states and 6110 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:15,730 INFO L93 Difference]: Finished difference Result 2256 states and 6538 transitions. [2021-06-05 21:37:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:37:15,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:15,733 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 21:37:15,733 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 21:37:15,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:37:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 21:37:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2016. [2021-06-05 21:37:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 3.04863523573201) internal successors, (6143), 2015 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6143 transitions. [2021-06-05 21:37:15,754 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6143 transitions. Word has length 21 [2021-06-05 21:37:15,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:15,754 INFO L482 AbstractCegarLoop]: Abstraction has 2016 states and 6143 transitions. [2021-06-05 21:37:15,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6143 transitions. [2021-06-05 21:37:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:15,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:15,756 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:15,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39616,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:15,956 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash 327009918, now seen corresponding path program 310 times [2021-06-05 21:37:15,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:15,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026297378] [2021-06-05 21:37:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:16,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:16,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026297378] [2021-06-05 21:37:16,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026297378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:16,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219681159] [2021-06-05 21:37:16,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:16,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:16,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:16,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:16,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:16,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219681159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:16,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:16,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:16,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236958116] [2021-06-05 21:37:16,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:16,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:16,068 INFO L87 Difference]: Start difference. First operand 2016 states and 6143 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:16,143 INFO L93 Difference]: Finished difference Result 2369 states and 6830 transitions. [2021-06-05 21:37:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:37:16,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:16,146 INFO L225 Difference]: With dead ends: 2369 [2021-06-05 21:37:16,146 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 21:37:16,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 21:37:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2015. [2021-06-05 21:37:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.048162859980139) internal successors, (6139), 2014 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6139 transitions. [2021-06-05 21:37:16,167 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6139 transitions. Word has length 21 [2021-06-05 21:37:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:16,167 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 6139 transitions. [2021-06-05 21:37:16,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6139 transitions. [2021-06-05 21:37:16,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:16,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:16,169 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:16,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39617 [2021-06-05 21:37:16,369 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:16,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1275555135, now seen corresponding path program 311 times [2021-06-05 21:37:16,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:16,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494418569] [2021-06-05 21:37:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:16,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:16,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494418569] [2021-06-05 21:37:16,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494418569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:16,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460804597] [2021-06-05 21:37:16,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:16,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:37:16,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:16,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:16,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:16,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460804597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:16,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:16,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:16,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008983989] [2021-06-05 21:37:16,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:16,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:16,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:16,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:16,482 INFO L87 Difference]: Start difference. First operand 2015 states and 6139 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:16,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:16,606 INFO L93 Difference]: Finished difference Result 2175 states and 6426 transitions. [2021-06-05 21:37:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:16,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:16,609 INFO L225 Difference]: With dead ends: 2175 [2021-06-05 21:37:16,609 INFO L226 Difference]: Without dead ends: 2157 [2021-06-05 21:37:16,609 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:37:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-06-05 21:37:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1987. [2021-06-05 21:37:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.0463242698892246) internal successors, (6050), 1986 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 6050 transitions. [2021-06-05 21:37:16,630 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 6050 transitions. Word has length 21 [2021-06-05 21:37:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:16,630 INFO L482 AbstractCegarLoop]: Abstraction has 1987 states and 6050 transitions. [2021-06-05 21:37:16,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 6050 transitions. [2021-06-05 21:37:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:16,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:16,632 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:16,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39618 [2021-06-05 21:37:16,832 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:16,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:16,833 INFO L82 PathProgramCache]: Analyzing trace with hash 864865496, now seen corresponding path program 312 times [2021-06-05 21:37:16,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:16,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324478850] [2021-06-05 21:37:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:16,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:16,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324478850] [2021-06-05 21:37:16,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324478850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:16,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992919348] [2021-06-05 21:37:16,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:16,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:37:16,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:16,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:16,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992919348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:16,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:16,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:16,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967648090] [2021-06-05 21:37:16,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:16,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:16,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:16,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:16,947 INFO L87 Difference]: Start difference. First operand 1987 states and 6050 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:17,062 INFO L93 Difference]: Finished difference Result 2488 states and 7125 transitions. [2021-06-05 21:37:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:37:17,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:17,064 INFO L225 Difference]: With dead ends: 2488 [2021-06-05 21:37:17,064 INFO L226 Difference]: Without dead ends: 2488 [2021-06-05 21:37:17,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:37:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-05 21:37:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1994. [2021-06-05 21:37:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.046161565479177) internal successors, (6071), 1993 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6071 transitions. [2021-06-05 21:37:17,086 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6071 transitions. Word has length 21 [2021-06-05 21:37:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:17,086 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6071 transitions. [2021-06-05 21:37:17,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6071 transitions. [2021-06-05 21:37:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:17,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:17,088 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:17,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39619,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:17,289 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:17,289 INFO L82 PathProgramCache]: Analyzing trace with hash 223475963, now seen corresponding path program 313 times [2021-06-05 21:37:17,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:17,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758015618] [2021-06-05 21:37:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:17,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:17,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758015618] [2021-06-05 21:37:17,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758015618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:17,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459192684] [2021-06-05 21:37:17,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:17,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:17,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:17,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459192684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:17,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:17,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:17,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623631338] [2021-06-05 21:37:17,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:17,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:17,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:17,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:17,419 INFO L87 Difference]: Start difference. First operand 1994 states and 6071 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:17,544 INFO L93 Difference]: Finished difference Result 2166 states and 6392 transitions. [2021-06-05 21:37:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:17,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:17,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:17,546 INFO L225 Difference]: With dead ends: 2166 [2021-06-05 21:37:17,546 INFO L226 Difference]: Without dead ends: 2158 [2021-06-05 21:37:17,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-06-05 21:37:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2000. [2021-06-05 21:37:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.0400200100050023) internal successors, (6077), 1999 states have internal predecessors, (6077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 6077 transitions. [2021-06-05 21:37:17,567 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 6077 transitions. Word has length 21 [2021-06-05 21:37:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:17,567 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 6077 transitions. [2021-06-05 21:37:17,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 6077 transitions. [2021-06-05 21:37:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:17,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:17,569 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:17,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39620,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:17,769 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:17,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:17,770 INFO L82 PathProgramCache]: Analyzing trace with hash 358519230, now seen corresponding path program 314 times [2021-06-05 21:37:17,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:17,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531236568] [2021-06-05 21:37:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:17,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:17,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531236568] [2021-06-05 21:37:17,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531236568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:17,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421523661] [2021-06-05 21:37:17,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:17,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:17,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:17,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421523661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:17,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:17,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:17,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941443925] [2021-06-05 21:37:17,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:17,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:17,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:17,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:17,894 INFO L87 Difference]: Start difference. First operand 2000 states and 6077 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:18,058 INFO L93 Difference]: Finished difference Result 2684 states and 7629 transitions. [2021-06-05 21:37:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:37:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:18,061 INFO L225 Difference]: With dead ends: 2684 [2021-06-05 21:37:18,061 INFO L226 Difference]: Without dead ends: 2684 [2021-06-05 21:37:18,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-06-05 21:37:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1877. [2021-06-05 21:37:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.031449893390192) internal successors, (5687), 1876 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5687 transitions. [2021-06-05 21:37:18,084 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5687 transitions. Word has length 21 [2021-06-05 21:37:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:18,084 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 5687 transitions. [2021-06-05 21:37:18,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5687 transitions. [2021-06-05 21:37:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:18,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:18,085 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:18,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39621,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:18,286 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:18,286 INFO L82 PathProgramCache]: Analyzing trace with hash -449518021, now seen corresponding path program 315 times [2021-06-05 21:37:18,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:18,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628490479] [2021-06-05 21:37:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:18,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:18,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628490479] [2021-06-05 21:37:18,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628490479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:18,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116344173] [2021-06-05 21:37:18,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:18,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:18,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:18,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:37:18,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116344173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:18,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:18,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:37:18,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872449806] [2021-06-05 21:37:18,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:37:18,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:18,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:37:18,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:37:18,388 INFO L87 Difference]: Start difference. First operand 1877 states and 5687 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:18,457 INFO L93 Difference]: Finished difference Result 2128 states and 6179 transitions. [2021-06-05 21:37:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:37:18,458 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:18,459 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 21:37:18,460 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 21:37:18,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 21:37:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1878. [2021-06-05 21:37:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.0261054874800215) internal successors, (5680), 1877 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5680 transitions. [2021-06-05 21:37:18,479 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5680 transitions. Word has length 21 [2021-06-05 21:37:18,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:18,479 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5680 transitions. [2021-06-05 21:37:18,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5680 transitions. [2021-06-05 21:37:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:18,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:18,481 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:18,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39622,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:18,682 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:18,682 INFO L82 PathProgramCache]: Analyzing trace with hash -368387736, now seen corresponding path program 316 times [2021-06-05 21:37:18,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:18,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543686893] [2021-06-05 21:37:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:18,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:18,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543686893] [2021-06-05 21:37:18,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543686893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:18,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407737483] [2021-06-05 21:37:18,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:18,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:18,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:18,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:37:18,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407737483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:18,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:18,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:37:18,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192809687] [2021-06-05 21:37:18,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:37:18,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:18,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:37:18,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:37:18,789 INFO L87 Difference]: Start difference. First operand 1878 states and 5680 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:18,903 INFO L93 Difference]: Finished difference Result 2105 states and 6036 transitions. [2021-06-05 21:37:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:37:18,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:18,905 INFO L225 Difference]: With dead ends: 2105 [2021-06-05 21:37:18,905 INFO L226 Difference]: Without dead ends: 2103 [2021-06-05 21:37:18,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:37:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-06-05 21:37:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1878. [2021-06-05 21:37:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.0218433670751197) internal successors, (5672), 1877 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5672 transitions. [2021-06-05 21:37:18,926 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5672 transitions. Word has length 21 [2021-06-05 21:37:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:18,926 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5672 transitions. [2021-06-05 21:37:18,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5672 transitions. [2021-06-05 21:37:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:18,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:18,928 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:19,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39623 [2021-06-05 21:37:19,128 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:19,129 INFO L82 PathProgramCache]: Analyzing trace with hash -628368897, now seen corresponding path program 317 times [2021-06-05 21:37:19,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:19,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595982941] [2021-06-05 21:37:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:19,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:19,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595982941] [2021-06-05 21:37:19,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595982941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:19,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628563975] [2021-06-05 21:37:19,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:19,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:37:19,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:19,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:19,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:19,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628563975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:19,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:19,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:19,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193926194] [2021-06-05 21:37:19,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:19,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:19,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:19,244 INFO L87 Difference]: Start difference. First operand 1878 states and 5672 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:19,386 INFO L93 Difference]: Finished difference Result 2035 states and 5959 transitions. [2021-06-05 21:37:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:19,386 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:19,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:19,388 INFO L225 Difference]: With dead ends: 2035 [2021-06-05 21:37:19,388 INFO L226 Difference]: Without dead ends: 2021 [2021-06-05 21:37:19,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-06-05 21:37:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1848. [2021-06-05 21:37:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.0211153221440172) internal successors, (5580), 1847 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 5580 transitions. [2021-06-05 21:37:19,408 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 5580 transitions. Word has length 21 [2021-06-05 21:37:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:19,408 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 5580 transitions. [2021-06-05 21:37:19,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 5580 transitions. [2021-06-05 21:37:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:19,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:19,410 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:19,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39624 [2021-06-05 21:37:19,611 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:19,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:19,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1039058536, now seen corresponding path program 318 times [2021-06-05 21:37:19,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:19,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759656004] [2021-06-05 21:37:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:19,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:19,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759656004] [2021-06-05 21:37:19,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759656004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:19,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722931891] [2021-06-05 21:37:19,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:19,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:37:19,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:19,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:19,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:19,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722931891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:19,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:19,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:19,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508200266] [2021-06-05 21:37:19,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:19,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:19,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:19,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:19,721 INFO L87 Difference]: Start difference. First operand 1848 states and 5580 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:19,811 INFO L93 Difference]: Finished difference Result 2226 states and 6355 transitions. [2021-06-05 21:37:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:37:19,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:19,813 INFO L225 Difference]: With dead ends: 2226 [2021-06-05 21:37:19,813 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 21:37:19,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:37:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 21:37:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1837. [2021-06-05 21:37:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.017429193899782) internal successors, (5540), 1836 states have internal predecessors, (5540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 5540 transitions. [2021-06-05 21:37:19,833 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 5540 transitions. Word has length 21 [2021-06-05 21:37:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:19,833 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 5540 transitions. [2021-06-05 21:37:19,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:19,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 5540 transitions. [2021-06-05 21:37:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:19,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:19,834 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:20,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39625 [2021-06-05 21:37:20,035 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:20,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1680448069, now seen corresponding path program 319 times [2021-06-05 21:37:20,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:20,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617571168] [2021-06-05 21:37:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:20,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:20,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617571168] [2021-06-05 21:37:20,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617571168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:20,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801449258] [2021-06-05 21:37:20,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:20,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:20,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:20,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801449258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:20,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:20,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:20,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832664723] [2021-06-05 21:37:20,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:20,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:20,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:20,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:20,151 INFO L87 Difference]: Start difference. First operand 1837 states and 5540 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:20,289 INFO L93 Difference]: Finished difference Result 2036 states and 5912 transitions. [2021-06-05 21:37:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:20,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:20,291 INFO L225 Difference]: With dead ends: 2036 [2021-06-05 21:37:20,291 INFO L226 Difference]: Without dead ends: 2028 [2021-06-05 21:37:20,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:37:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-06-05 21:37:20,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1837. [2021-06-05 21:37:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.0152505446623095) internal successors, (5536), 1836 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 5536 transitions. [2021-06-05 21:37:20,312 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 5536 transitions. Word has length 21 [2021-06-05 21:37:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:20,312 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 5536 transitions. [2021-06-05 21:37:20,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 5536 transitions. [2021-06-05 21:37:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:20,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:20,314 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:20,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39626,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:20,515 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:20,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1545404802, now seen corresponding path program 320 times [2021-06-05 21:37:20,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:20,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990417477] [2021-06-05 21:37:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:20,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:20,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990417477] [2021-06-05 21:37:20,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990417477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:20,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832727552] [2021-06-05 21:37:20,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:20,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:20,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:20,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:20,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:20,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832727552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:20,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:20,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:20,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216043704] [2021-06-05 21:37:20,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:20,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:20,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:20,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:20,636 INFO L87 Difference]: Start difference. First operand 1837 states and 5536 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:20,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:20,770 INFO L93 Difference]: Finished difference Result 2364 states and 6697 transitions. [2021-06-05 21:37:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:37:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:20,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:20,772 INFO L225 Difference]: With dead ends: 2364 [2021-06-05 21:37:20,772 INFO L226 Difference]: Without dead ends: 2364 [2021-06-05 21:37:20,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:37:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-06-05 21:37:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1754. [2021-06-05 21:37:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.0119794637763833) internal successors, (5280), 1753 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5280 transitions. [2021-06-05 21:37:20,791 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5280 transitions. Word has length 21 [2021-06-05 21:37:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:20,791 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 5280 transitions. [2021-06-05 21:37:20,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5280 transitions. [2021-06-05 21:37:20,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:20,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:20,793 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:20,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39627 [2021-06-05 21:37:20,994 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:20,994 INFO L82 PathProgramCache]: Analyzing trace with hash 64835967, now seen corresponding path program 321 times [2021-06-05 21:37:20,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:20,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982230536] [2021-06-05 21:37:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:21,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:21,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982230536] [2021-06-05 21:37:21,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982230536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:21,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446629415] [2021-06-05 21:37:21,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:21,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:21,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:21,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:21,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:21,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446629415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:21,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:21,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:21,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647149064] [2021-06-05 21:37:21,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:21,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:21,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:21,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:21,115 INFO L87 Difference]: Start difference. First operand 1754 states and 5280 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:21,251 INFO L93 Difference]: Finished difference Result 2020 states and 5847 transitions. [2021-06-05 21:37:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:21,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:21,263 INFO L225 Difference]: With dead ends: 2020 [2021-06-05 21:37:21,263 INFO L226 Difference]: Without dead ends: 2010 [2021-06-05 21:37:21,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-06-05 21:37:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1756. [2021-06-05 21:37:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 3.0091168091168092) internal successors, (5281), 1755 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5281 transitions. [2021-06-05 21:37:21,281 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5281 transitions. Word has length 21 [2021-06-05 21:37:21,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:21,281 INFO L482 AbstractCegarLoop]: Abstraction has 1756 states and 5281 transitions. [2021-06-05 21:37:21,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5281 transitions. [2021-06-05 21:37:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:21,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:21,282 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:21,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39628,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:21,483 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash -62269864, now seen corresponding path program 322 times [2021-06-05 21:37:21,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:21,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889703080] [2021-06-05 21:37:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:21,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:21,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889703080] [2021-06-05 21:37:21,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889703080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:21,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500629133] [2021-06-05 21:37:21,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:21,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:21,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:21,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:21,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:21,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500629133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:21,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:21,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:21,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658787305] [2021-06-05 21:37:21,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:21,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:21,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:21,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:21,602 INFO L87 Difference]: Start difference. First operand 1756 states and 5281 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:21,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:21,784 INFO L93 Difference]: Finished difference Result 3174 states and 9068 transitions. [2021-06-05 21:37:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:21,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:21,787 INFO L225 Difference]: With dead ends: 3174 [2021-06-05 21:37:21,787 INFO L226 Difference]: Without dead ends: 3174 [2021-06-05 21:37:21,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:37:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-05 21:37:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 1885. [2021-06-05 21:37:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.0031847133757963) internal successors, (5658), 1884 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 5658 transitions. [2021-06-05 21:37:21,811 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 5658 transitions. Word has length 21 [2021-06-05 21:37:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:21,811 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 5658 transitions. [2021-06-05 21:37:21,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 5658 transitions. [2021-06-05 21:37:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:21,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:21,812 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:22,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39629 [2021-06-05 21:37:22,013 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:22,013 INFO L82 PathProgramCache]: Analyzing trace with hash 658379131, now seen corresponding path program 323 times [2021-06-05 21:37:22,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:22,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555286428] [2021-06-05 21:37:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:22,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:22,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555286428] [2021-06-05 21:37:22,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555286428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:22,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020438137] [2021-06-05 21:37:22,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:22,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:22,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:22,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:22,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:37:22,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020438137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:22,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:22,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:37:22,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460827724] [2021-06-05 21:37:22,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:37:22,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:22,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:37:22,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:37:22,116 INFO L87 Difference]: Start difference. First operand 1885 states and 5658 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:22,178 INFO L93 Difference]: Finished difference Result 2149 states and 6166 transitions. [2021-06-05 21:37:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:37:22,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:22,181 INFO L225 Difference]: With dead ends: 2149 [2021-06-05 21:37:22,181 INFO L226 Difference]: Without dead ends: 2147 [2021-06-05 21:37:22,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-06-05 21:37:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1876. [2021-06-05 21:37:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9994666666666667) internal successors, (5624), 1875 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:22,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5624 transitions. [2021-06-05 21:37:22,200 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5624 transitions. Word has length 21 [2021-06-05 21:37:22,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:22,200 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5624 transitions. [2021-06-05 21:37:22,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5624 transitions. [2021-06-05 21:37:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:22,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:22,202 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:22,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39630,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:22,403 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash 739509416, now seen corresponding path program 324 times [2021-06-05 21:37:22,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:22,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091054865] [2021-06-05 21:37:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:22,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:22,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091054865] [2021-06-05 21:37:22,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091054865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:22,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99969825] [2021-06-05 21:37:22,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:22,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:37:22,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:22,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:37:22,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99969825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:22,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:22,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:37:22,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742016970] [2021-06-05 21:37:22,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:37:22,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:22,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:37:22,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:37:22,498 INFO L87 Difference]: Start difference. First operand 1876 states and 5624 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:22,608 INFO L93 Difference]: Finished difference Result 2097 states and 6031 transitions. [2021-06-05 21:37:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:37:22,609 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:22,611 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 21:37:22,611 INFO L226 Difference]: Without dead ends: 2095 [2021-06-05 21:37:22,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:37:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-06-05 21:37:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1899. [2021-06-05 21:37:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 3.0010537407797684) internal successors, (5696), 1898 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5696 transitions. [2021-06-05 21:37:22,630 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5696 transitions. Word has length 21 [2021-06-05 21:37:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:22,630 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5696 transitions. [2021-06-05 21:37:22,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5696 transitions. [2021-06-05 21:37:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:22,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:22,632 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:22,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39631,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:22,833 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:22,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:22,833 INFO L82 PathProgramCache]: Analyzing trace with hash 479528255, now seen corresponding path program 325 times [2021-06-05 21:37:22,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:22,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772202889] [2021-06-05 21:37:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:22,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:22,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772202889] [2021-06-05 21:37:22,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772202889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:22,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714750324] [2021-06-05 21:37:22,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:22,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:22,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:22,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714750324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:22,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:22,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:22,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372353073] [2021-06-05 21:37:22,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:22,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:22,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:22,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:22,940 INFO L87 Difference]: Start difference. First operand 1899 states and 5696 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:23,094 INFO L93 Difference]: Finished difference Result 2154 states and 6140 transitions. [2021-06-05 21:37:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:23,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:23,096 INFO L225 Difference]: With dead ends: 2154 [2021-06-05 21:37:23,096 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 21:37:23,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 21:37:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1861. [2021-06-05 21:37:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1860 states have (on average 2.9935483870967743) internal successors, (5568), 1860 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 5568 transitions. [2021-06-05 21:37:23,116 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 5568 transitions. Word has length 21 [2021-06-05 21:37:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:23,116 INFO L482 AbstractCegarLoop]: Abstraction has 1861 states and 5568 transitions. [2021-06-05 21:37:23,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 5568 transitions. [2021-06-05 21:37:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:23,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:23,118 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:23,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39632,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:23,318 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:23,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:23,319 INFO L82 PathProgramCache]: Analyzing trace with hash -572550917, now seen corresponding path program 326 times [2021-06-05 21:37:23,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:23,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329399030] [2021-06-05 21:37:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:23,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:23,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329399030] [2021-06-05 21:37:23,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329399030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:23,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537374491] [2021-06-05 21:37:23,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:23,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:23,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:23,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:23,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:23,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537374491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:23,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:23,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:23,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42527965] [2021-06-05 21:37:23,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:23,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:23,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:23,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:23,433 INFO L87 Difference]: Start difference. First operand 1861 states and 5568 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:23,614 INFO L93 Difference]: Finished difference Result 2057 states and 5928 transitions. [2021-06-05 21:37:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:23,614 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:23,616 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 21:37:23,616 INFO L226 Difference]: Without dead ends: 2041 [2021-06-05 21:37:23,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-05 21:37:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1865. [2021-06-05 21:37:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.984978540772532) internal successors, (5564), 1864 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 5564 transitions. [2021-06-05 21:37:23,635 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 5564 transitions. Word has length 21 [2021-06-05 21:37:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:23,635 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 5564 transitions. [2021-06-05 21:37:23,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 5564 transitions. [2021-06-05 21:37:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:23,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:23,637 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:23,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39633,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:23,837 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:23,838 INFO L82 PathProgramCache]: Analyzing trace with hash -437507650, now seen corresponding path program 327 times [2021-06-05 21:37:23,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:23,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352068209] [2021-06-05 21:37:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:23,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:23,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352068209] [2021-06-05 21:37:23,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352068209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:23,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989646225] [2021-06-05 21:37:23,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:23,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:23,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:23,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:23,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:23,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989646225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:23,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:23,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:23,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482572408] [2021-06-05 21:37:23,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:23,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:23,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:23,952 INFO L87 Difference]: Start difference. First operand 1865 states and 5564 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:24,061 INFO L93 Difference]: Finished difference Result 2235 states and 6339 transitions. [2021-06-05 21:37:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:37:24,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:24,063 INFO L225 Difference]: With dead ends: 2235 [2021-06-05 21:37:24,064 INFO L226 Difference]: Without dead ends: 2235 [2021-06-05 21:37:24,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:37:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-06-05 21:37:24,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1818. [2021-06-05 21:37:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.977435332966428) internal successors, (5410), 1817 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5410 transitions. [2021-06-05 21:37:24,083 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5410 transitions. Word has length 21 [2021-06-05 21:37:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:24,083 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5410 transitions. [2021-06-05 21:37:24,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5410 transitions. [2021-06-05 21:37:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:24,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:24,085 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:24,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39634,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:24,286 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:24,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:24,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1172733119, now seen corresponding path program 328 times [2021-06-05 21:37:24,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:24,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966567867] [2021-06-05 21:37:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:24,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966567867] [2021-06-05 21:37:24,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966567867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059808012] [2021-06-05 21:37:24,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:24,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:24,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:24,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:24,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:24,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059808012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:24,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:24,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:24,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293567049] [2021-06-05 21:37:24,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:24,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:24,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:24,410 INFO L87 Difference]: Start difference. First operand 1818 states and 5410 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:24,548 INFO L93 Difference]: Finished difference Result 2108 states and 6025 transitions. [2021-06-05 21:37:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:24,551 INFO L225 Difference]: With dead ends: 2108 [2021-06-05 21:37:24,551 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 21:37:24,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:37:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 21:37:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1818. [2021-06-05 21:37:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.976884975233902) internal successors, (5409), 1817 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5409 transitions. [2021-06-05 21:37:24,570 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5409 transitions. Word has length 21 [2021-06-05 21:37:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:24,570 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5409 transitions. [2021-06-05 21:37:24,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5409 transitions. [2021-06-05 21:37:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:24,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:24,572 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:24,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39635 [2021-06-05 21:37:24,772 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:24,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1045627288, now seen corresponding path program 329 times [2021-06-05 21:37:24,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:24,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650449591] [2021-06-05 21:37:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:24,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:24,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650449591] [2021-06-05 21:37:24,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650449591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:24,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047864800] [2021-06-05 21:37:24,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:24,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:37:24,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:24,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047864800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:24,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:24,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:24,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536276841] [2021-06-05 21:37:24,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:24,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:24,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:24,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:24,890 INFO L87 Difference]: Start difference. First operand 1818 states and 5409 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:25,056 INFO L93 Difference]: Finished difference Result 3306 states and 9499 transitions. [2021-06-05 21:37:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:37:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:25,060 INFO L225 Difference]: With dead ends: 3306 [2021-06-05 21:37:25,061 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 21:37:25,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 21:37:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 1865. [2021-06-05 21:37:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.962982832618026) internal successors, (5523), 1864 states have internal predecessors, (5523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 5523 transitions. [2021-06-05 21:37:25,094 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 5523 transitions. Word has length 21 [2021-06-05 21:37:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:25,095 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 5523 transitions. [2021-06-05 21:37:25,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 5523 transitions. [2021-06-05 21:37:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:25,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:25,096 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:25,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39636 [2021-06-05 21:37:25,297 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash -558036613, now seen corresponding path program 330 times [2021-06-05 21:37:25,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:25,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272554312] [2021-06-05 21:37:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:25,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:25,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272554312] [2021-06-05 21:37:25,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272554312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:25,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939014453] [2021-06-05 21:37:25,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:25,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:37:25,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:25,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:25,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:25,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939014453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:25,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:25,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:25,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915429057] [2021-06-05 21:37:25,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:25,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:25,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:25,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:25,422 INFO L87 Difference]: Start difference. First operand 1865 states and 5523 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:25,546 INFO L93 Difference]: Finished difference Result 2163 states and 6155 transitions. [2021-06-05 21:37:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:25,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:25,549 INFO L225 Difference]: With dead ends: 2163 [2021-06-05 21:37:25,549 INFO L226 Difference]: Without dead ends: 2151 [2021-06-05 21:37:25,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-05 21:37:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1867. [2021-06-05 21:37:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9608788853161845) internal successors, (5525), 1866 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5525 transitions. [2021-06-05 21:37:25,569 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5525 transitions. Word has length 21 [2021-06-05 21:37:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:25,569 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 5525 transitions. [2021-06-05 21:37:25,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5525 transitions. [2021-06-05 21:37:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:25,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:25,571 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:25,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39637 [2021-06-05 21:37:25,771 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash -221829890, now seen corresponding path program 331 times [2021-06-05 21:37:25,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:25,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794260325] [2021-06-05 21:37:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:25,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:25,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794260325] [2021-06-05 21:37:25,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794260325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:25,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025014161] [2021-06-05 21:37:25,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:25,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:25,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:25,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025014161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:25,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:25,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:25,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713231233] [2021-06-05 21:37:25,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:25,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:25,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:25,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:25,891 INFO L87 Difference]: Start difference. First operand 1867 states and 5525 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:26,121 INFO L93 Difference]: Finished difference Result 3350 states and 9497 transitions. [2021-06-05 21:37:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:37:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:26,125 INFO L225 Difference]: With dead ends: 3350 [2021-06-05 21:37:26,125 INFO L226 Difference]: Without dead ends: 3350 [2021-06-05 21:37:26,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=336, Invalid=656, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:37:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-06-05 21:37:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1964. [2021-06-05 21:37:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 2.957717778909832) internal successors, (5806), 1963 states have internal predecessors, (5806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 5806 transitions. [2021-06-05 21:37:26,150 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 5806 transitions. Word has length 21 [2021-06-05 21:37:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:26,150 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 5806 transitions. [2021-06-05 21:37:26,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:26,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 5806 transitions. [2021-06-05 21:37:26,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:26,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:26,152 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:26,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39638 [2021-06-05 21:37:26,353 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:26,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:26,353 INFO L82 PathProgramCache]: Analyzing trace with hash 496894629, now seen corresponding path program 332 times [2021-06-05 21:37:26,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:26,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549358752] [2021-06-05 21:37:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:26,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:26,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549358752] [2021-06-05 21:37:26,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549358752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:26,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675015870] [2021-06-05 21:37:26,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:26,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:26,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:26,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:26,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:26,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675015870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:26,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:26,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:26,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611046425] [2021-06-05 21:37:26,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:26,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:26,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:26,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:26,467 INFO L87 Difference]: Start difference. First operand 1964 states and 5806 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:26,552 INFO L93 Difference]: Finished difference Result 2106 states and 6084 transitions. [2021-06-05 21:37:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:37:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:26,555 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 21:37:26,555 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 21:37:26,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:26,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 21:37:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1970. [2021-06-05 21:37:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.957846622651092) internal successors, (5824), 1969 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5824 transitions. [2021-06-05 21:37:26,576 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5824 transitions. Word has length 21 [2021-06-05 21:37:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:26,577 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5824 transitions. [2021-06-05 21:37:26,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5824 transitions. [2021-06-05 21:37:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:26,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:26,578 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:26,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39639 [2021-06-05 21:37:26,779 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:26,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1283033832, now seen corresponding path program 333 times [2021-06-05 21:37:26,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:26,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687676849] [2021-06-05 21:37:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:26,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:26,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687676849] [2021-06-05 21:37:26,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687676849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:26,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189446044] [2021-06-05 21:37:26,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:26,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:37:26,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:26,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:26,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189446044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:26,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:26,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:26,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617755550] [2021-06-05 21:37:26,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:26,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:26,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:26,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:26,887 INFO L87 Difference]: Start difference. First operand 1970 states and 5824 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:27,046 INFO L93 Difference]: Finished difference Result 2190 states and 6175 transitions. [2021-06-05 21:37:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:27,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:27,048 INFO L225 Difference]: With dead ends: 2190 [2021-06-05 21:37:27,048 INFO L226 Difference]: Without dead ends: 2186 [2021-06-05 21:37:27,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-06-05 21:37:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1970. [2021-06-05 21:37:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.95733875063484) internal successors, (5823), 1969 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5823 transitions. [2021-06-05 21:37:27,068 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5823 transitions. Word has length 21 [2021-06-05 21:37:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:27,068 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5823 transitions. [2021-06-05 21:37:27,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5823 transitions. [2021-06-05 21:37:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:27,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:27,070 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:27,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39640,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:27,270 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:27,270 INFO L82 PathProgramCache]: Analyzing trace with hash 49909311, now seen corresponding path program 334 times [2021-06-05 21:37:27,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:27,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822742106] [2021-06-05 21:37:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:27,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:27,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822742106] [2021-06-05 21:37:27,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822742106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:27,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914849243] [2021-06-05 21:37:27,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:27,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:27,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:27,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:27,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914849243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:27,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:27,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:27,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111751676] [2021-06-05 21:37:27,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:27,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:27,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:27,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:27,382 INFO L87 Difference]: Start difference. First operand 1970 states and 5823 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:27,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:27,472 INFO L93 Difference]: Finished difference Result 2213 states and 6351 transitions. [2021-06-05 21:37:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:37:27,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:27,474 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 21:37:27,474 INFO L226 Difference]: Without dead ends: 2193 [2021-06-05 21:37:27,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:37:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-06-05 21:37:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1970. [2021-06-05 21:37:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.9563230066023363) internal successors, (5821), 1969 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5821 transitions. [2021-06-05 21:37:27,495 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5821 transitions. Word has length 21 [2021-06-05 21:37:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:27,495 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5821 transitions. [2021-06-05 21:37:27,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5821 transitions. [2021-06-05 21:37:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:27,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:27,497 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:27,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39641,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:27,697 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:27,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:27,698 INFO L82 PathProgramCache]: Analyzing trace with hash -77196520, now seen corresponding path program 335 times [2021-06-05 21:37:27,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:27,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354977105] [2021-06-05 21:37:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:27,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:27,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354977105] [2021-06-05 21:37:27,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354977105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:27,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488385874] [2021-06-05 21:37:27,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:27,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:37:27,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:27,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:27,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:27,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488385874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:27,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:27,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:27,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920547097] [2021-06-05 21:37:27,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:27,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:27,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:27,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:27,809 INFO L87 Difference]: Start difference. First operand 1970 states and 5821 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:27,986 INFO L93 Difference]: Finished difference Result 2787 states and 7905 transitions. [2021-06-05 21:37:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:27,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:27,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:27,988 INFO L225 Difference]: With dead ends: 2787 [2021-06-05 21:37:27,988 INFO L226 Difference]: Without dead ends: 2787 [2021-06-05 21:37:27,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:37:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-05 21:37:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2121. [2021-06-05 21:37:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.9627358490566036) internal successors, (6281), 2120 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6281 transitions. [2021-06-05 21:37:28,011 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6281 transitions. Word has length 21 [2021-06-05 21:37:28,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:28,011 INFO L482 AbstractCegarLoop]: Abstraction has 2121 states and 6281 transitions. [2021-06-05 21:37:28,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6281 transitions. [2021-06-05 21:37:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:28,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:28,013 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:28,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39642,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:28,214 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:28,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:28,214 INFO L82 PathProgramCache]: Analyzing trace with hash -586557543, now seen corresponding path program 336 times [2021-06-05 21:37:28,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:28,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900997920] [2021-06-05 21:37:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:28,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:28,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900997920] [2021-06-05 21:37:28,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900997920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:28,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80104523] [2021-06-05 21:37:28,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:28,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:37:28,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:28,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:28,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80104523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:28,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:28,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:28,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100952743] [2021-06-05 21:37:28,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:28,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:28,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:28,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:28,339 INFO L87 Difference]: Start difference. First operand 2121 states and 6281 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:28,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:28,487 INFO L93 Difference]: Finished difference Result 2439 states and 6992 transitions. [2021-06-05 21:37:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:28,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:28,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:28,490 INFO L225 Difference]: With dead ends: 2439 [2021-06-05 21:37:28,490 INFO L226 Difference]: Without dead ends: 2419 [2021-06-05 21:37:28,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:37:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-06-05 21:37:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2121. [2021-06-05 21:37:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.9584905660377356) internal successors, (6272), 2120 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6272 transitions. [2021-06-05 21:37:28,520 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6272 transitions. Word has length 21 [2021-06-05 21:37:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:28,520 INFO L482 AbstractCegarLoop]: Abstraction has 2121 states and 6272 transitions. [2021-06-05 21:37:28,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6272 transitions. [2021-06-05 21:37:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:28,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:28,522 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:28,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39643 [2021-06-05 21:37:28,722 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:28,723 INFO L82 PathProgramCache]: Analyzing trace with hash -713663374, now seen corresponding path program 337 times [2021-06-05 21:37:28,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:28,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167303697] [2021-06-05 21:37:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:28,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:28,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167303697] [2021-06-05 21:37:28,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167303697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:28,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098419259] [2021-06-05 21:37:28,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:28,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:28,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:28,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098419259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:28,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:28,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:28,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047945129] [2021-06-05 21:37:28,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:28,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:28,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:28,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:28,838 INFO L87 Difference]: Start difference. First operand 2121 states and 6272 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:28,992 INFO L93 Difference]: Finished difference Result 2730 states and 7756 transitions. [2021-06-05 21:37:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:37:28,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:28,994 INFO L225 Difference]: With dead ends: 2730 [2021-06-05 21:37:28,994 INFO L226 Difference]: Without dead ends: 2730 [2021-06-05 21:37:28,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-06-05 21:37:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 1965. [2021-06-05 21:37:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 2.969959266802444) internal successors, (5833), 1964 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 5833 transitions. [2021-06-05 21:37:29,016 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 5833 transitions. Word has length 21 [2021-06-05 21:37:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:29,016 INFO L482 AbstractCegarLoop]: Abstraction has 1965 states and 5833 transitions. [2021-06-05 21:37:29,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 5833 transitions. [2021-06-05 21:37:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:29,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:29,018 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:29,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39644,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:29,219 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:29,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1977640021, now seen corresponding path program 338 times [2021-06-05 21:37:29,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:29,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128820058] [2021-06-05 21:37:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:29,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:29,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128820058] [2021-06-05 21:37:29,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128820058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:29,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80196867] [2021-06-05 21:37:29,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:29,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:29,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:29,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:29,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:29,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80196867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:29,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:29,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:29,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418746503] [2021-06-05 21:37:29,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:29,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:29,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:29,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:29,337 INFO L87 Difference]: Start difference. First operand 1965 states and 5833 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:29,444 INFO L93 Difference]: Finished difference Result 2345 states and 6666 transitions. [2021-06-05 21:37:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:29,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:29,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:29,446 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 21:37:29,446 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 21:37:29,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:29,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 21:37:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1974. [2021-06-05 21:37:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.964521033958439) internal successors, (5849), 1973 states have internal predecessors, (5849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 5849 transitions. [2021-06-05 21:37:29,468 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 5849 transitions. Word has length 21 [2021-06-05 21:37:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:29,468 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 5849 transitions. [2021-06-05 21:37:29,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 5849 transitions. [2021-06-05 21:37:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:29,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:29,470 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:29,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39645 [2021-06-05 21:37:29,670 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1981120552, now seen corresponding path program 339 times [2021-06-05 21:37:29,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:29,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076971575] [2021-06-05 21:37:29,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:29,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:29,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076971575] [2021-06-05 21:37:29,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076971575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:29,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760504582] [2021-06-05 21:37:29,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:29,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:37:29,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:29,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:29,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:29,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760504582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:29,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:29,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:29,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129962548] [2021-06-05 21:37:29,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:29,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:29,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:29,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:29,790 INFO L87 Difference]: Start difference. First operand 1974 states and 5849 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:30,027 INFO L93 Difference]: Finished difference Result 3098 states and 8778 transitions. [2021-06-05 21:37:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:30,027 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:30,030 INFO L225 Difference]: With dead ends: 3098 [2021-06-05 21:37:30,030 INFO L226 Difference]: Without dead ends: 3098 [2021-06-05 21:37:30,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:37:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-06-05 21:37:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 1904. [2021-06-05 21:37:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.9600630583289544) internal successors, (5633), 1903 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5633 transitions. [2021-06-05 21:37:30,053 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5633 transitions. Word has length 21 [2021-06-05 21:37:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:30,053 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 5633 transitions. [2021-06-05 21:37:30,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5633 transitions. [2021-06-05 21:37:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:30,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:30,055 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:30,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39646,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:30,255 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:30,255 INFO L82 PathProgramCache]: Analyzing trace with hash 643452475, now seen corresponding path program 340 times [2021-06-05 21:37:30,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:30,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037073971] [2021-06-05 21:37:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:30,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:30,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037073971] [2021-06-05 21:37:30,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037073971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:30,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042735970] [2021-06-05 21:37:30,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:30,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:30,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:30,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:30,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042735970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:30,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:30,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:37:30,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400127472] [2021-06-05 21:37:30,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:37:30,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:30,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:37:30,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:37:30,354 INFO L87 Difference]: Start difference. First operand 1904 states and 5633 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:30,421 INFO L93 Difference]: Finished difference Result 2228 states and 6256 transitions. [2021-06-05 21:37:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:37:30,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:30,424 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 21:37:30,424 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 21:37:30,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 21:37:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1928. [2021-06-05 21:37:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.9709392838609237) internal successors, (5725), 1927 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 5725 transitions. [2021-06-05 21:37:30,443 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 5725 transitions. Word has length 21 [2021-06-05 21:37:30,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:30,443 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 5725 transitions. [2021-06-05 21:37:30,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 5725 transitions. [2021-06-05 21:37:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:30,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:30,445 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:30,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39647 [2021-06-05 21:37:30,645 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:30,646 INFO L82 PathProgramCache]: Analyzing trace with hash 724582760, now seen corresponding path program 341 times [2021-06-05 21:37:30,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:30,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165908561] [2021-06-05 21:37:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:30,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:30,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165908561] [2021-06-05 21:37:30,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165908561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:30,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824327413] [2021-06-05 21:37:30,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:30,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:37:30,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:30,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:30,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824327413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:30,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:30,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:37:30,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690243232] [2021-06-05 21:37:30,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:37:30,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:30,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:37:30,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:37:30,753 INFO L87 Difference]: Start difference. First operand 1928 states and 5725 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:30,867 INFO L93 Difference]: Finished difference Result 2105 states and 6019 transitions. [2021-06-05 21:37:30,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:37:30,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:30,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:30,869 INFO L225 Difference]: With dead ends: 2105 [2021-06-05 21:37:30,869 INFO L226 Difference]: Without dead ends: 2103 [2021-06-05 21:37:30,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:37:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-06-05 21:37:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1939. [2021-06-05 21:37:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9726522187822497) internal successors, (5761), 1938 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5761 transitions. [2021-06-05 21:37:30,889 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5761 transitions. Word has length 21 [2021-06-05 21:37:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:30,889 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5761 transitions. [2021-06-05 21:37:30,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5761 transitions. [2021-06-05 21:37:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:30,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:30,891 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:31,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39648 [2021-06-05 21:37:31,091 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash -587477573, now seen corresponding path program 342 times [2021-06-05 21:37:31,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:31,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856437903] [2021-06-05 21:37:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:31,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:31,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856437903] [2021-06-05 21:37:31,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856437903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:31,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163284352] [2021-06-05 21:37:31,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:31,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:37:31,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:31,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:31,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:31,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163284352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:31,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:31,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:31,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886096178] [2021-06-05 21:37:31,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:31,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:31,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:31,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:31,205 INFO L87 Difference]: Start difference. First operand 1939 states and 5761 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:31,357 INFO L93 Difference]: Finished difference Result 2242 states and 6291 transitions. [2021-06-05 21:37:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:31,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:31,359 INFO L225 Difference]: With dead ends: 2242 [2021-06-05 21:37:31,359 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 21:37:31,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 21:37:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1939. [2021-06-05 21:37:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9623323013415894) internal successors, (5741), 1938 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5741 transitions. [2021-06-05 21:37:31,379 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5741 transitions. Word has length 21 [2021-06-05 21:37:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:31,379 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5741 transitions. [2021-06-05 21:37:31,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5741 transitions. [2021-06-05 21:37:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:31,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:31,381 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:31,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39649 [2021-06-05 21:37:31,581 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1157806463, now seen corresponding path program 343 times [2021-06-05 21:37:31,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:31,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480007441] [2021-06-05 21:37:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:31,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:31,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480007441] [2021-06-05 21:37:31,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480007441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:31,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877121611] [2021-06-05 21:37:31,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:31,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:31,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877121611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:31,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:31,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:31,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123047770] [2021-06-05 21:37:31,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:31,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:31,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:31,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:31,704 INFO L87 Difference]: Start difference. First operand 1939 states and 5741 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:31,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:31,885 INFO L93 Difference]: Finished difference Result 2170 states and 6162 transitions. [2021-06-05 21:37:31,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:31,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:31,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:31,888 INFO L225 Difference]: With dead ends: 2170 [2021-06-05 21:37:31,888 INFO L226 Difference]: Without dead ends: 2150 [2021-06-05 21:37:31,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-05 21:37:31,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1941. [2021-06-05 21:37:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.956701030927835) internal successors, (5736), 1940 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5736 transitions. [2021-06-05 21:37:31,908 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5736 transitions. Word has length 21 [2021-06-05 21:37:31,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:31,908 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5736 transitions. [2021-06-05 21:37:31,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5736 transitions. [2021-06-05 21:37:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:31,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:31,909 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:32,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39650,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:32,110 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:32,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1030700632, now seen corresponding path program 344 times [2021-06-05 21:37:32,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:32,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980821558] [2021-06-05 21:37:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:32,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:32,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980821558] [2021-06-05 21:37:32,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980821558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:32,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988383022] [2021-06-05 21:37:32,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:32,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:32,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:32,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:32,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:32,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988383022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:32,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:32,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:32,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319339344] [2021-06-05 21:37:32,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:32,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:32,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:32,237 INFO L87 Difference]: Start difference. First operand 1941 states and 5736 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:32,366 INFO L93 Difference]: Finished difference Result 2262 states and 6373 transitions. [2021-06-05 21:37:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:37:32,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:32,369 INFO L225 Difference]: With dead ends: 2262 [2021-06-05 21:37:32,369 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 21:37:32,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:32,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 21:37:32,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1442. [2021-06-05 21:37:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.8986814712005553) internal successors, (4177), 1441 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4177 transitions. [2021-06-05 21:37:32,391 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4177 transitions. Word has length 21 [2021-06-05 21:37:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:32,391 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4177 transitions. [2021-06-05 21:37:32,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:32,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4177 transitions. [2021-06-05 21:37:32,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:32,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:32,393 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:32,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39651,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:32,597 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash -572963269, now seen corresponding path program 345 times [2021-06-05 21:37:32,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:32,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605044161] [2021-06-05 21:37:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:32,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605044161] [2021-06-05 21:37:32,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605044161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443910082] [2021-06-05 21:37:32,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:32,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:37:32,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:32,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:32,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443910082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:32,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:32,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:32,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375844743] [2021-06-05 21:37:32,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:32,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:32,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:32,726 INFO L87 Difference]: Start difference. First operand 1442 states and 4177 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:32,844 INFO L93 Difference]: Finished difference Result 1911 states and 5213 transitions. [2021-06-05 21:37:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:32,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:32,846 INFO L225 Difference]: With dead ends: 1911 [2021-06-05 21:37:32,846 INFO L226 Difference]: Without dead ends: 1899 [2021-06-05 21:37:32,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-05 21:37:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1444. [2021-06-05 21:37:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 2.898128898128898) internal successors, (4182), 1443 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4182 transitions. [2021-06-05 21:37:32,862 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4182 transitions. Word has length 21 [2021-06-05 21:37:32,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:32,862 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4182 transitions. [2021-06-05 21:37:32,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4182 transitions. [2021-06-05 21:37:32,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:32,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:32,863 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:33,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39652,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:33,064 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:33,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:33,064 INFO L82 PathProgramCache]: Analyzing trace with hash -236756546, now seen corresponding path program 346 times [2021-06-05 21:37:33,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:33,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903142353] [2021-06-05 21:37:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:33,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:33,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903142353] [2021-06-05 21:37:33,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903142353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:33,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095199946] [2021-06-05 21:37:33,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:33,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:33,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:33,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:33,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:33,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095199946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:33,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:33,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:33,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118807607] [2021-06-05 21:37:33,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:33,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:33,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:33,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:33,204 INFO L87 Difference]: Start difference. First operand 1444 states and 4182 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:33,401 INFO L93 Difference]: Finished difference Result 2375 states and 6555 transitions. [2021-06-05 21:37:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:33,404 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 21:37:33,404 INFO L226 Difference]: Without dead ends: 2375 [2021-06-05 21:37:33,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:37:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-06-05 21:37:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1721. [2021-06-05 21:37:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 2.9209302325581397) internal successors, (5024), 1720 states have internal predecessors, (5024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5024 transitions. [2021-06-05 21:37:33,423 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5024 transitions. Word has length 21 [2021-06-05 21:37:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:33,423 INFO L482 AbstractCegarLoop]: Abstraction has 1721 states and 5024 transitions. [2021-06-05 21:37:33,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5024 transitions. [2021-06-05 21:37:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:33,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:33,424 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:33,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39653,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:33,625 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:33,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1607749887, now seen corresponding path program 347 times [2021-06-05 21:37:33,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:33,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910283396] [2021-06-05 21:37:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:33,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:33,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910283396] [2021-06-05 21:37:33,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910283396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:33,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116951227] [2021-06-05 21:37:33,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:33,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:33,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:33,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:33,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:33,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116951227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:33,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:33,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:33,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127086917] [2021-06-05 21:37:33,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:33,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:33,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:33,757 INFO L87 Difference]: Start difference. First operand 1721 states and 5024 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:33,873 INFO L93 Difference]: Finished difference Result 2189 states and 6061 transitions. [2021-06-05 21:37:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:33,875 INFO L225 Difference]: With dead ends: 2189 [2021-06-05 21:37:33,875 INFO L226 Difference]: Without dead ends: 2175 [2021-06-05 21:37:33,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:37:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-06-05 21:37:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1736. [2021-06-05 21:37:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.9129682997118156) internal successors, (5054), 1735 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5054 transitions. [2021-06-05 21:37:33,893 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5054 transitions. Word has length 21 [2021-06-05 21:37:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:33,893 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 5054 transitions. [2021-06-05 21:37:33,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5054 transitions. [2021-06-05 21:37:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:33,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:33,894 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:34,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39654,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:34,095 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:34,095 INFO L82 PathProgramCache]: Analyzing trace with hash -873223400, now seen corresponding path program 348 times [2021-06-05 21:37:34,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:34,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634870182] [2021-06-05 21:37:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:34,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:34,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634870182] [2021-06-05 21:37:34,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634870182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:34,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267117553] [2021-06-05 21:37:34,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:34,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:37:34,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:34,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:34,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:34,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267117553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:34,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:34,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:34,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398111091] [2021-06-05 21:37:34,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:34,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:34,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:34,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:34,227 INFO L87 Difference]: Start difference. First operand 1736 states and 5054 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:34,496 INFO L93 Difference]: Finished difference Result 2910 states and 8090 transitions. [2021-06-05 21:37:34,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:37:34,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:34,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:34,499 INFO L225 Difference]: With dead ends: 2910 [2021-06-05 21:37:34,499 INFO L226 Difference]: Without dead ends: 2910 [2021-06-05 21:37:34,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:37:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-06-05 21:37:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2068. [2021-06-05 21:37:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.9225931301403) internal successors, (6041), 2067 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 6041 transitions. [2021-06-05 21:37:34,522 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 6041 transitions. Word has length 21 [2021-06-05 21:37:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:34,522 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 6041 transitions. [2021-06-05 21:37:34,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 6041 transitions. [2021-06-05 21:37:34,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:34,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:34,524 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:34,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39655,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:34,725 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:34,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1793458955, now seen corresponding path program 349 times [2021-06-05 21:37:34,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:34,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335619046] [2021-06-05 21:37:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:34,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:34,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335619046] [2021-06-05 21:37:34,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335619046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:34,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956950517] [2021-06-05 21:37:34,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:34,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:34,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:34,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956950517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:34,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:34,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:34,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460793616] [2021-06-05 21:37:34,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:34,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:34,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:34,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:34,835 INFO L87 Difference]: Start difference. First operand 2068 states and 6041 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:34,923 INFO L93 Difference]: Finished difference Result 2357 states and 6621 transitions. [2021-06-05 21:37:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:37:34,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:34,926 INFO L225 Difference]: With dead ends: 2357 [2021-06-05 21:37:34,926 INFO L226 Difference]: Without dead ends: 2357 [2021-06-05 21:37:34,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:37:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-06-05 21:37:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2117. [2021-06-05 21:37:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.9343100189035916) internal successors, (6209), 2116 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6209 transitions. [2021-06-05 21:37:34,948 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6209 transitions. Word has length 21 [2021-06-05 21:37:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:34,948 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6209 transitions. [2021-06-05 21:37:34,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6209 transitions. [2021-06-05 21:37:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:34,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:34,950 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:35,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39656 [2021-06-05 21:37:35,150 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash 13530494, now seen corresponding path program 350 times [2021-06-05 21:37:35,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:35,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746005466] [2021-06-05 21:37:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:35,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:35,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746005466] [2021-06-05 21:37:35,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746005466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:35,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70981589] [2021-06-05 21:37:35,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:35,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:35,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:35,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:35,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:35,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70981589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:35,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:35,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:35,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896647961] [2021-06-05 21:37:35,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:35,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:35,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:35,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:35,261 INFO L87 Difference]: Start difference. First operand 2117 states and 6209 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:35,443 INFO L93 Difference]: Finished difference Result 2396 states and 6695 transitions. [2021-06-05 21:37:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:35,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:35,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:35,446 INFO L225 Difference]: With dead ends: 2396 [2021-06-05 21:37:35,446 INFO L226 Difference]: Without dead ends: 2392 [2021-06-05 21:37:35,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-06-05 21:37:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2136. [2021-06-05 21:37:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.9400468384074943) internal successors, (6277), 2135 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 6277 transitions. [2021-06-05 21:37:35,468 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 6277 transitions. Word has length 21 [2021-06-05 21:37:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:35,468 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 6277 transitions. [2021-06-05 21:37:35,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 6277 transitions. [2021-06-05 21:37:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:35,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:35,470 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:35,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39657 [2021-06-05 21:37:35,670 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2115307227, now seen corresponding path program 351 times [2021-06-05 21:37:35,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:35,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679318662] [2021-06-05 21:37:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:35,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679318662] [2021-06-05 21:37:35,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679318662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413662003] [2021-06-05 21:37:35,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:35,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:35,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:35,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:35,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413662003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:35,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:35,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:35,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867498728] [2021-06-05 21:37:35,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:35,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:35,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:35,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:35,775 INFO L87 Difference]: Start difference. First operand 2136 states and 6277 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:35,891 INFO L93 Difference]: Finished difference Result 2333 states and 6617 transitions. [2021-06-05 21:37:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:35,894 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 21:37:35,894 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 21:37:35,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:35,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 21:37:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2136. [2021-06-05 21:37:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.9395784543325525) internal successors, (6276), 2135 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 6276 transitions. [2021-06-05 21:37:35,919 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 6276 transitions. Word has length 21 [2021-06-05 21:37:35,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:35,920 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 6276 transitions. [2021-06-05 21:37:35,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 6276 transitions. [2021-06-05 21:37:35,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:35,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:35,921 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:36,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39658,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:36,122 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1518396286, now seen corresponding path program 352 times [2021-06-05 21:37:36,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:36,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10197615] [2021-06-05 21:37:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:36,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:36,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10197615] [2021-06-05 21:37:36,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10197615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:36,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125404946] [2021-06-05 21:37:36,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:36,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:36,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:36,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125404946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:36,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:36,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:36,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691530424] [2021-06-05 21:37:36,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:36,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:36,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:36,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:36,226 INFO L87 Difference]: Start difference. First operand 2136 states and 6276 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:36,297 INFO L93 Difference]: Finished difference Result 2457 states and 6862 transitions. [2021-06-05 21:37:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:37:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:36,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:36,300 INFO L225 Difference]: With dead ends: 2457 [2021-06-05 21:37:36,300 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 21:37:36,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:36,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 21:37:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2126. [2021-06-05 21:37:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.9345882352941177) internal successors, (6236), 2125 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6236 transitions. [2021-06-05 21:37:36,326 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6236 transitions. Word has length 21 [2021-06-05 21:37:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:36,326 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 6236 transitions. [2021-06-05 21:37:36,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6236 transitions. [2021-06-05 21:37:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:36,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:36,328 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:36,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39659 [2021-06-05 21:37:36,528 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:36,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1020762949, now seen corresponding path program 353 times [2021-06-05 21:37:36,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:36,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874378108] [2021-06-05 21:37:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:36,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:36,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874378108] [2021-06-05 21:37:36,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874378108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:36,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009623954] [2021-06-05 21:37:36,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:36,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:37:36,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:36,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:36,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:36,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009623954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:36,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:36,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:36,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819462059] [2021-06-05 21:37:36,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:36,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:36,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:36,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:36,648 INFO L87 Difference]: Start difference. First operand 2126 states and 6236 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:36,767 INFO L93 Difference]: Finished difference Result 2437 states and 6925 transitions. [2021-06-05 21:37:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:36,770 INFO L225 Difference]: With dead ends: 2437 [2021-06-05 21:37:36,770 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 21:37:36,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:37:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 21:37:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2126. [2021-06-05 21:37:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.9336470588235293) internal successors, (6234), 2125 states have internal predecessors, (6234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6234 transitions. [2021-06-05 21:37:36,792 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6234 transitions. Word has length 21 [2021-06-05 21:37:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:36,792 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 6234 transitions. [2021-06-05 21:37:36,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6234 transitions. [2021-06-05 21:37:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:36,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:36,794 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:36,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39660,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:36,994 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash -684556226, now seen corresponding path program 354 times [2021-06-05 21:37:36,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:36,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061553954] [2021-06-05 21:37:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:37,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:37,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061553954] [2021-06-05 21:37:37,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061553954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:37,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613506137] [2021-06-05 21:37:37,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:37,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:37:37,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:37,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:37,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613506137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:37,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:37,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:37,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749561856] [2021-06-05 21:37:37,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:37,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:37,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:37,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:37,112 INFO L87 Difference]: Start difference. First operand 2126 states and 6234 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:37,318 INFO L93 Difference]: Finished difference Result 2763 states and 7759 transitions. [2021-06-05 21:37:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:37,318 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:37,320 INFO L225 Difference]: With dead ends: 2763 [2021-06-05 21:37:37,320 INFO L226 Difference]: Without dead ends: 2763 [2021-06-05 21:37:37,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:37:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-06-05 21:37:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2240. [2021-06-05 21:37:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.9383653416703885) internal successors, (6579), 2239 states have internal predecessors, (6579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 6579 transitions. [2021-06-05 21:37:37,343 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 6579 transitions. Word has length 21 [2021-06-05 21:37:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:37,343 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 6579 transitions. [2021-06-05 21:37:37,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:37,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 6579 transitions. [2021-06-05 21:37:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:37,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:37,345 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:37,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39661,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:37,546 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:37,546 INFO L82 PathProgramCache]: Analyzing trace with hash 723601057, now seen corresponding path program 355 times [2021-06-05 21:37:37,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:37,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415115891] [2021-06-05 21:37:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:37,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:37,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415115891] [2021-06-05 21:37:37,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415115891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:37,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386190] [2021-06-05 21:37:37,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:37,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:37,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:37,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:37,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:37,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:37,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397663604] [2021-06-05 21:37:37,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:37,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:37,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:37,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:37,671 INFO L87 Difference]: Start difference. First operand 2240 states and 6579 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:37,828 INFO L93 Difference]: Finished difference Result 2620 states and 7456 transitions. [2021-06-05 21:37:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:37,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:37,830 INFO L225 Difference]: With dead ends: 2620 [2021-06-05 21:37:37,830 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 21:37:37,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:37:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 21:37:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2240. [2021-06-05 21:37:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.935685573916927) internal successors, (6573), 2239 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 6573 transitions. [2021-06-05 21:37:37,854 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 6573 transitions. Word has length 21 [2021-06-05 21:37:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:37,854 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 6573 transitions. [2021-06-05 21:37:37,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 6573 transitions. [2021-06-05 21:37:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:37,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:37,856 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:38,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39662 [2021-06-05 21:37:38,056 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:38,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1059807780, now seen corresponding path program 356 times [2021-06-05 21:37:38,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:38,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586199344] [2021-06-05 21:37:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:38,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:38,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586199344] [2021-06-05 21:37:38,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586199344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:38,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64368479] [2021-06-05 21:37:38,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:38,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:38,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:38,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64368479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:38,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:38,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:38,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805562851] [2021-06-05 21:37:38,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:38,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:38,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:38,179 INFO L87 Difference]: Start difference. First operand 2240 states and 6573 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:38,368 INFO L93 Difference]: Finished difference Result 2711 states and 7663 transitions. [2021-06-05 21:37:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:38,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:38,371 INFO L225 Difference]: With dead ends: 2711 [2021-06-05 21:37:38,371 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 21:37:38,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:37:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 21:37:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 1587. [2021-06-05 21:37:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.91109709962169) internal successors, (4617), 1586 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4617 transitions. [2021-06-05 21:37:38,390 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4617 transitions. Word has length 21 [2021-06-05 21:37:38,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:38,390 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 4617 transitions. [2021-06-05 21:37:38,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4617 transitions. [2021-06-05 21:37:38,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:38,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:38,392 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:38,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39663,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:38,592 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:38,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1390653083, now seen corresponding path program 357 times [2021-06-05 21:37:38,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:38,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681434842] [2021-06-05 21:37:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:38,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:38,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681434842] [2021-06-05 21:37:38,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681434842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:38,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18171451] [2021-06-05 21:37:38,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:38,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:37:38,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:38,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:38,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:38,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18171451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:38,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:38,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:38,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237576228] [2021-06-05 21:37:38,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:38,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:38,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:38,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:38,740 INFO L87 Difference]: Start difference. First operand 1587 states and 4617 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:38,843 INFO L93 Difference]: Finished difference Result 2083 states and 5732 transitions. [2021-06-05 21:37:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:38,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:38,846 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 21:37:38,846 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 21:37:38,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:37:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 21:37:38,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1608. [2021-06-05 21:37:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.8985687616677036) internal successors, (4658), 1607 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4658 transitions. [2021-06-05 21:37:38,863 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4658 transitions. Word has length 21 [2021-06-05 21:37:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:38,863 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4658 transitions. [2021-06-05 21:37:38,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4658 transitions. [2021-06-05 21:37:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:38,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:38,865 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:39,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39664,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:39,065 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:39,065 INFO L82 PathProgramCache]: Analyzing trace with hash 423340926, now seen corresponding path program 358 times [2021-06-05 21:37:39,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:39,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109835189] [2021-06-05 21:37:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:39,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:39,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109835189] [2021-06-05 21:37:39,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109835189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:39,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746161858] [2021-06-05 21:37:39,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:39,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:39,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:39,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:39,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:39,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746161858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:39,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:39,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:39,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657112134] [2021-06-05 21:37:39,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:39,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:39,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:39,192 INFO L87 Difference]: Start difference. First operand 1608 states and 4658 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:39,457 INFO L93 Difference]: Finished difference Result 2373 states and 6517 transitions. [2021-06-05 21:37:39,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:37:39,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:39,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:39,459 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 21:37:39,459 INFO L226 Difference]: Without dead ends: 2373 [2021-06-05 21:37:39,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:37:39,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-06-05 21:37:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1546. [2021-06-05 21:37:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.8944983818770225) internal successors, (4472), 1545 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 4472 transitions. [2021-06-05 21:37:39,477 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 4472 transitions. Word has length 21 [2021-06-05 21:37:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:39,477 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 4472 transitions. [2021-06-05 21:37:39,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 4472 transitions. [2021-06-05 21:37:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:39,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:39,479 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:39,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39665,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:39,679 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:39,680 INFO L82 PathProgramCache]: Analyzing trace with hash 180726139, now seen corresponding path program 359 times [2021-06-05 21:37:39,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:39,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762811506] [2021-06-05 21:37:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:39,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762811506] [2021-06-05 21:37:39,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762811506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928698240] [2021-06-05 21:37:39,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:39,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:39,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:39,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:39,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928698240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:39,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:39,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:39,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181326156] [2021-06-05 21:37:39,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:39,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:39,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:39,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:39,786 INFO L87 Difference]: Start difference. First operand 1546 states and 4472 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:39,851 INFO L93 Difference]: Finished difference Result 2113 states and 5765 transitions. [2021-06-05 21:37:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:37:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:39,853 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 21:37:39,853 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 21:37:39,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 21:37:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1736. [2021-06-05 21:37:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.936023054755043) internal successors, (5094), 1735 states have internal predecessors, (5094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5094 transitions. [2021-06-05 21:37:39,872 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5094 transitions. Word has length 21 [2021-06-05 21:37:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:39,872 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 5094 transitions. [2021-06-05 21:37:39,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5094 transitions. [2021-06-05 21:37:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:39,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:39,873 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:40,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39666,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:40,074 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash 261856424, now seen corresponding path program 360 times [2021-06-05 21:37:40,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:40,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532654802] [2021-06-05 21:37:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:40,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:40,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532654802] [2021-06-05 21:37:40,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532654802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:40,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911986564] [2021-06-05 21:37:40,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:40,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:37:40,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:40,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:40,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:40,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911986564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:40,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:40,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:40,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509446134] [2021-06-05 21:37:40,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:40,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:40,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:40,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:40,173 INFO L87 Difference]: Start difference. First operand 1736 states and 5094 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:40,312 INFO L93 Difference]: Finished difference Result 1970 states and 5495 transitions. [2021-06-05 21:37:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:40,314 INFO L225 Difference]: With dead ends: 1970 [2021-06-05 21:37:40,314 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 21:37:40,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 21:37:40,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1755. [2021-06-05 21:37:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 2.944127708095781) internal successors, (5164), 1754 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5164 transitions. [2021-06-05 21:37:40,332 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5164 transitions. Word has length 21 [2021-06-05 21:37:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:40,332 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 5164 transitions. [2021-06-05 21:37:40,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5164 transitions. [2021-06-05 21:37:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:40,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:40,334 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:40,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39667,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:40,534 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:40,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:40,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1775453631, now seen corresponding path program 361 times [2021-06-05 21:37:40,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:40,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262803112] [2021-06-05 21:37:40,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:40,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:40,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262803112] [2021-06-05 21:37:40,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262803112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:40,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000543127] [2021-06-05 21:37:40,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:40,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:40,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000543127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:40,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:40,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:40,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252709873] [2021-06-05 21:37:40,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:40,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:40,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:40,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:40,636 INFO L87 Difference]: Start difference. First operand 1755 states and 5164 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:40,767 INFO L93 Difference]: Finished difference Result 2106 states and 5785 transitions. [2021-06-05 21:37:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:40,770 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 21:37:40,770 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 21:37:40,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 21:37:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1755. [2021-06-05 21:37:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 2.943557582668187) internal successors, (5163), 1754 states have internal predecessors, (5163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5163 transitions. [2021-06-05 21:37:40,788 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5163 transitions. Word has length 21 [2021-06-05 21:37:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:40,788 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 5163 transitions. [2021-06-05 21:37:40,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5163 transitions. [2021-06-05 21:37:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:40,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:40,790 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:40,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39668 [2021-06-05 21:37:40,990 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1114189848, now seen corresponding path program 362 times [2021-06-05 21:37:40,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:40,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452278781] [2021-06-05 21:37:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:41,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:41,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452278781] [2021-06-05 21:37:41,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452278781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:41,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055269146] [2021-06-05 21:37:41,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:41,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:41,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:41,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:41,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:41,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055269146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:41,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:41,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:37:41,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871955960] [2021-06-05 21:37:41,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:37:41,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:41,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:37:41,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:37:41,090 INFO L87 Difference]: Start difference. First operand 1755 states and 5163 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:41,176 INFO L93 Difference]: Finished difference Result 2027 states and 5646 transitions. [2021-06-05 21:37:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:37:41,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:41,178 INFO L225 Difference]: With dead ends: 2027 [2021-06-05 21:37:41,178 INFO L226 Difference]: Without dead ends: 2027 [2021-06-05 21:37:41,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-05 21:37:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1735. [2021-06-05 21:37:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 2.9371395617070357) internal successors, (5093), 1734 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 5093 transitions. [2021-06-05 21:37:41,196 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 5093 transitions. Word has length 21 [2021-06-05 21:37:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:41,196 INFO L482 AbstractCegarLoop]: Abstraction has 1735 states and 5093 transitions. [2021-06-05 21:37:41,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 5093 transitions. [2021-06-05 21:37:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:41,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:41,198 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:41,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39669 [2021-06-05 21:37:41,398 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:41,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1875263, now seen corresponding path program 363 times [2021-06-05 21:37:41,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:41,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443642679] [2021-06-05 21:37:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:41,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:41,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443642679] [2021-06-05 21:37:41,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443642679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:41,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966888225] [2021-06-05 21:37:41,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:41,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:37:41,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:41,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:41,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966888225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:41,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:41,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:41,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703656378] [2021-06-05 21:37:41,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:41,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:41,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:41,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:41,516 INFO L87 Difference]: Start difference. First operand 1735 states and 5093 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:41,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:41,654 INFO L93 Difference]: Finished difference Result 2088 states and 5771 transitions. [2021-06-05 21:37:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:41,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:41,656 INFO L225 Difference]: With dead ends: 2088 [2021-06-05 21:37:41,656 INFO L226 Difference]: Without dead ends: 2078 [2021-06-05 21:37:41,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-06-05 21:37:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1761. [2021-06-05 21:37:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.947159090909091) internal successors, (5187), 1760 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 5187 transitions. [2021-06-05 21:37:41,674 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 5187 transitions. Word has length 21 [2021-06-05 21:37:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:41,675 INFO L482 AbstractCegarLoop]: Abstraction has 1761 states and 5187 transitions. [2021-06-05 21:37:41,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 5187 transitions. [2021-06-05 21:37:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:41,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:41,676 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:41,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39670,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:41,877 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1050203909, now seen corresponding path program 364 times [2021-06-05 21:37:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:41,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716378033] [2021-06-05 21:37:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:41,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:41,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716378033] [2021-06-05 21:37:41,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716378033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:41,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774057059] [2021-06-05 21:37:41,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:41,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:41,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:41,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:41,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:41,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774057059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:41,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:41,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:41,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457964481] [2021-06-05 21:37:41,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:41,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:41,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:41,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:41,989 INFO L87 Difference]: Start difference. First operand 1761 states and 5187 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:42,149 INFO L93 Difference]: Finished difference Result 2110 states and 5814 transitions. [2021-06-05 21:37:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:42,151 INFO L225 Difference]: With dead ends: 2110 [2021-06-05 21:37:42,151 INFO L226 Difference]: Without dead ends: 2102 [2021-06-05 21:37:42,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:42,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-06-05 21:37:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1765. [2021-06-05 21:37:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.945011337868481) internal successors, (5195), 1764 states have internal predecessors, (5195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5195 transitions. [2021-06-05 21:37:42,170 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5195 transitions. Word has length 21 [2021-06-05 21:37:42,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:42,170 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 5195 transitions. [2021-06-05 21:37:42,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5195 transitions. [2021-06-05 21:37:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:42,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:42,171 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:42,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39671 [2021-06-05 21:37:42,372 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:42,372 INFO L82 PathProgramCache]: Analyzing trace with hash -915160642, now seen corresponding path program 365 times [2021-06-05 21:37:42,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:42,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644433552] [2021-06-05 21:37:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:42,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:42,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644433552] [2021-06-05 21:37:42,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644433552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:42,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587876670] [2021-06-05 21:37:42,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:42,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:37:42,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:42,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:42,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:42,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587876670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:42,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:42,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:42,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863775487] [2021-06-05 21:37:42,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:42,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:42,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:42,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:42,488 INFO L87 Difference]: Start difference. First operand 1765 states and 5195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:42,601 INFO L93 Difference]: Finished difference Result 2026 states and 5698 transitions. [2021-06-05 21:37:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:37:42,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:42,603 INFO L225 Difference]: With dead ends: 2026 [2021-06-05 21:37:42,603 INFO L226 Difference]: Without dead ends: 2026 [2021-06-05 21:37:42,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:42,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-05 21:37:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1701. [2021-06-05 21:37:42,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.9376470588235293) internal successors, (4994), 1700 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4994 transitions. [2021-06-05 21:37:42,620 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4994 transitions. Word has length 21 [2021-06-05 21:37:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:42,620 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4994 transitions. [2021-06-05 21:37:42,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4994 transitions. [2021-06-05 21:37:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:42,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:42,622 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:42,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39672 [2021-06-05 21:37:42,822 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:42,823 INFO L82 PathProgramCache]: Analyzing trace with hash 695080127, now seen corresponding path program 366 times [2021-06-05 21:37:42,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:42,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146713655] [2021-06-05 21:37:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:42,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:42,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146713655] [2021-06-05 21:37:42,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146713655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:42,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207709755] [2021-06-05 21:37:42,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:42,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:37:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:42,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:42,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207709755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:42,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:42,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:42,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291281305] [2021-06-05 21:37:42,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:42,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:42,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:42,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:42,969 INFO L87 Difference]: Start difference. First operand 1701 states and 4994 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:43,111 INFO L93 Difference]: Finished difference Result 2422 states and 6653 transitions. [2021-06-05 21:37:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:37:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:43,114 INFO L225 Difference]: With dead ends: 2422 [2021-06-05 21:37:43,114 INFO L226 Difference]: Without dead ends: 2402 [2021-06-05 21:37:43,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-06-05 21:37:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1701. [2021-06-05 21:37:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.934705882352941) internal successors, (4989), 1700 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4989 transitions. [2021-06-05 21:37:43,137 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4989 transitions. Word has length 21 [2021-06-05 21:37:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:43,137 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4989 transitions. [2021-06-05 21:37:43,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4989 transitions. [2021-06-05 21:37:43,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:43,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:43,138 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:43,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39673,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:43,339 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash 567974296, now seen corresponding path program 367 times [2021-06-05 21:37:43,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:43,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830458264] [2021-06-05 21:37:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:43,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:43,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830458264] [2021-06-05 21:37:43,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830458264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:43,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170578740] [2021-06-05 21:37:43,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:43,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:43,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:43,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170578740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:43,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:43,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:43,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372313409] [2021-06-05 21:37:43,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:43,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:43,455 INFO L87 Difference]: Start difference. First operand 1701 states and 4989 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:43,538 INFO L93 Difference]: Finished difference Result 2175 states and 6221 transitions. [2021-06-05 21:37:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:37:43,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:43,540 INFO L225 Difference]: With dead ends: 2175 [2021-06-05 21:37:43,540 INFO L226 Difference]: Without dead ends: 2175 [2021-06-05 21:37:43,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:37:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-06-05 21:37:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2028. [2021-06-05 21:37:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.938332511100148) internal successors, (5956), 2027 states have internal predecessors, (5956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5956 transitions. [2021-06-05 21:37:43,560 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5956 transitions. Word has length 21 [2021-06-05 21:37:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:43,560 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5956 transitions. [2021-06-05 21:37:43,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5956 transitions. [2021-06-05 21:37:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:43,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:43,561 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:43,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39674,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:43,762 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1035689605, now seen corresponding path program 368 times [2021-06-05 21:37:43,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:43,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223840198] [2021-06-05 21:37:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:43,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:43,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223840198] [2021-06-05 21:37:43,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223840198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:43,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340600098] [2021-06-05 21:37:43,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:43,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:43,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:43,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:43,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:43,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340600098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:43,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:43,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:43,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779468803] [2021-06-05 21:37:43,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:43,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:43,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:43,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:43,887 INFO L87 Difference]: Start difference. First operand 2028 states and 5956 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:44,040 INFO L93 Difference]: Finished difference Result 2740 states and 7631 transitions. [2021-06-05 21:37:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:44,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:44,042 INFO L225 Difference]: With dead ends: 2740 [2021-06-05 21:37:44,042 INFO L226 Difference]: Without dead ends: 2728 [2021-06-05 21:37:44,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:44,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-05 21:37:44,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2062. [2021-06-05 21:37:44,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.937894226103833) internal successors, (6055), 2061 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 6055 transitions. [2021-06-05 21:37:44,064 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 6055 transitions. Word has length 21 [2021-06-05 21:37:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:44,064 INFO L482 AbstractCegarLoop]: Abstraction has 2062 states and 6055 transitions. [2021-06-05 21:37:44,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 6055 transitions. [2021-06-05 21:37:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:44,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:44,065 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:44,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39675,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:44,266 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash -699482882, now seen corresponding path program 369 times [2021-06-05 21:37:44,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:44,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263066417] [2021-06-05 21:37:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:44,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:44,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263066417] [2021-06-05 21:37:44,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263066417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:44,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30353180] [2021-06-05 21:37:44,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:44,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:37:44,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:44,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:44,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30353180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:44,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:44,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:44,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909566154] [2021-06-05 21:37:44,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:44,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:44,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:44,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:44,390 INFO L87 Difference]: Start difference. First operand 2062 states and 6055 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:44,539 INFO L93 Difference]: Finished difference Result 2298 states and 6476 transitions. [2021-06-05 21:37:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:37:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:44,541 INFO L225 Difference]: With dead ends: 2298 [2021-06-05 21:37:44,541 INFO L226 Difference]: Without dead ends: 2298 [2021-06-05 21:37:44,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-05 21:37:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2031. [2021-06-05 21:37:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.9369458128078816) internal successors, (5962), 2030 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5962 transitions. [2021-06-05 21:37:44,561 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5962 transitions. Word has length 21 [2021-06-05 21:37:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:44,561 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5962 transitions. [2021-06-05 21:37:44,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5962 transitions. [2021-06-05 21:37:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:44,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:44,563 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:44,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39676,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:44,763 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:44,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:44,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1145023551, now seen corresponding path program 370 times [2021-06-05 21:37:44,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:44,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103612891] [2021-06-05 21:37:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:44,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:44,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103612891] [2021-06-05 21:37:44,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103612891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:44,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936661144] [2021-06-05 21:37:44,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:44,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:44,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:44,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:44,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:44,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936661144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:44,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:44,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:44,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874763648] [2021-06-05 21:37:44,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:44,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:44,891 INFO L87 Difference]: Start difference. First operand 2031 states and 5962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:44,991 INFO L93 Difference]: Finished difference Result 2345 states and 6662 transitions. [2021-06-05 21:37:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:37:44,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:44,993 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 21:37:44,993 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 21:37:44,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:44,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 21:37:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2031. [2021-06-05 21:37:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.9364532019704432) internal successors, (5961), 2030 states have internal predecessors, (5961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5961 transitions. [2021-06-05 21:37:45,015 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5961 transitions. Word has length 21 [2021-06-05 21:37:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:45,015 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5961 transitions. [2021-06-05 21:37:45,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:45,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5961 transitions. [2021-06-05 21:37:45,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:45,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:45,017 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:45,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39677,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:45,232 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1335949736, now seen corresponding path program 371 times [2021-06-05 21:37:45,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:45,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920799316] [2021-06-05 21:37:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:45,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:45,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920799316] [2021-06-05 21:37:45,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920799316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:45,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633487839] [2021-06-05 21:37:45,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:45,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:37:45,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:45,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:45,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:45,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633487839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:45,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:45,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:45,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706096219] [2021-06-05 21:37:45,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:45,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:45,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:45,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:45,364 INFO L87 Difference]: Start difference. First operand 2031 states and 5961 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:45,573 INFO L93 Difference]: Finished difference Result 2359 states and 6653 transitions. [2021-06-05 21:37:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:45,576 INFO L225 Difference]: With dead ends: 2359 [2021-06-05 21:37:45,576 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 21:37:45,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:37:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 21:37:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2104. [2021-06-05 21:37:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.9381835473133617) internal successors, (6179), 2103 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6179 transitions. [2021-06-05 21:37:45,599 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6179 transitions. Word has length 21 [2021-06-05 21:37:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:45,599 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 6179 transitions. [2021-06-05 21:37:45,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6179 transitions. [2021-06-05 21:37:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:45,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:45,601 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:45,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39678 [2021-06-05 21:37:45,802 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash 27654651, now seen corresponding path program 372 times [2021-06-05 21:37:45,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:45,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805620154] [2021-06-05 21:37:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:45,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:45,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805620154] [2021-06-05 21:37:45,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805620154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:45,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427603267] [2021-06-05 21:37:45,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:45,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:37:45,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:45,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:45,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:45,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427603267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:45,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:45,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:45,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082119487] [2021-06-05 21:37:45,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:45,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:45,956 INFO L87 Difference]: Start difference. First operand 2104 states and 6179 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:46,037 INFO L93 Difference]: Finished difference Result 2399 states and 6834 transitions. [2021-06-05 21:37:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:37:46,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:46,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:46,040 INFO L225 Difference]: With dead ends: 2399 [2021-06-05 21:37:46,040 INFO L226 Difference]: Without dead ends: 2383 [2021-06-05 21:37:46,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:37:46,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-05 21:37:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2104. [2021-06-05 21:37:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.9377080361388495) internal successors, (6178), 2103 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6178 transitions. [2021-06-05 21:37:46,064 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6178 transitions. Word has length 21 [2021-06-05 21:37:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:46,064 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 6178 transitions. [2021-06-05 21:37:46,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6178 transitions. [2021-06-05 21:37:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:46,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:46,066 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:46,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39679 [2021-06-05 21:37:46,267 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:46,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:46,267 INFO L82 PathProgramCache]: Analyzing trace with hash 408414270, now seen corresponding path program 373 times [2021-06-05 21:37:46,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:46,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660515690] [2021-06-05 21:37:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:46,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:46,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660515690] [2021-06-05 21:37:46,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660515690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:46,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003566548] [2021-06-05 21:37:46,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:46,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:46,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:46,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003566548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:46,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:46,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:46,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623354447] [2021-06-05 21:37:46,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:46,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:46,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:46,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:46,401 INFO L87 Difference]: Start difference. First operand 2104 states and 6178 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:46,661 INFO L93 Difference]: Finished difference Result 2543 states and 7159 transitions. [2021-06-05 21:37:46,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:37:46,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:46,664 INFO L225 Difference]: With dead ends: 2543 [2021-06-05 21:37:46,664 INFO L226 Difference]: Without dead ends: 2543 [2021-06-05 21:37:46,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:37:46,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-06-05 21:37:46,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2128. [2021-06-05 21:37:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.938410907381288) internal successors, (6250), 2127 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 6250 transitions. [2021-06-05 21:37:46,686 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 6250 transitions. Word has length 21 [2021-06-05 21:37:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:46,686 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 6250 transitions. [2021-06-05 21:37:46,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 6250 transitions. [2021-06-05 21:37:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:46,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:46,688 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:46,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39680,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:46,888 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:46,889 INFO L82 PathProgramCache]: Analyzing trace with hash -962719899, now seen corresponding path program 374 times [2021-06-05 21:37:46,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:46,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572582732] [2021-06-05 21:37:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:46,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:46,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572582732] [2021-06-05 21:37:46,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572582732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:46,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076676109] [2021-06-05 21:37:46,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:46,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:46,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:46,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:47,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076676109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:47,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:47,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:47,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384249822] [2021-06-05 21:37:47,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:47,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:47,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:47,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:47,013 INFO L87 Difference]: Start difference. First operand 2128 states and 6250 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:47,114 INFO L93 Difference]: Finished difference Result 2474 states and 6959 transitions. [2021-06-05 21:37:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:37:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:47,117 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 21:37:47,117 INFO L226 Difference]: Without dead ends: 2474 [2021-06-05 21:37:47,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:37:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-05 21:37:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2190. [2021-06-05 21:37:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 2.9520328917313843) internal successors, (6462), 2189 states have internal predecessors, (6462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 6462 transitions. [2021-06-05 21:37:47,140 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 6462 transitions. Word has length 21 [2021-06-05 21:37:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:47,140 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 6462 transitions. [2021-06-05 21:37:47,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 6462 transitions. [2021-06-05 21:37:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:47,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:47,142 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:47,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39681 [2021-06-05 21:37:47,342 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:47,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1552318936, now seen corresponding path program 375 times [2021-06-05 21:37:47,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:47,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272088653] [2021-06-05 21:37:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:47,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:47,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272088653] [2021-06-05 21:37:47,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272088653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:47,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718361526] [2021-06-05 21:37:47,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:47,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:47,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:47,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:47,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718361526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:47,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:47,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:47,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031651589] [2021-06-05 21:37:47,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:47,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:47,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:47,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:47,477 INFO L87 Difference]: Start difference. First operand 2190 states and 6462 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:47,701 INFO L93 Difference]: Finished difference Result 2504 states and 7007 transitions. [2021-06-05 21:37:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:47,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:47,704 INFO L225 Difference]: With dead ends: 2504 [2021-06-05 21:37:47,704 INFO L226 Difference]: Without dead ends: 2500 [2021-06-05 21:37:47,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-06-05 21:37:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2209. [2021-06-05 21:37:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.9556159420289854) internal successors, (6526), 2208 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:47,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6526 transitions. [2021-06-05 21:37:47,728 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6526 transitions. Word has length 21 [2021-06-05 21:37:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:47,728 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6526 transitions. [2021-06-05 21:37:47,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6526 transitions. [2021-06-05 21:37:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:47,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:47,730 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:47,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39682,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:47,931 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:47,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:47,931 INFO L82 PathProgramCache]: Analyzing trace with hash -576518785, now seen corresponding path program 376 times [2021-06-05 21:37:47,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:47,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424876315] [2021-06-05 21:37:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:47,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:47,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424876315] [2021-06-05 21:37:47,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424876315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:47,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357176943] [2021-06-05 21:37:47,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:48,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:48,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:48,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357176943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:48,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:48,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:48,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430718438] [2021-06-05 21:37:48,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:48,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:48,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:48,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:48,077 INFO L87 Difference]: Start difference. First operand 2209 states and 6526 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:48,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:48,202 INFO L93 Difference]: Finished difference Result 2434 states and 6886 transitions. [2021-06-05 21:37:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:48,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:48,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:48,205 INFO L225 Difference]: With dead ends: 2434 [2021-06-05 21:37:48,205 INFO L226 Difference]: Without dead ends: 2428 [2021-06-05 21:37:48,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-05 21:37:48,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2191. [2021-06-05 21:37:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 2.948401826484018) internal successors, (6457), 2190 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6457 transitions. [2021-06-05 21:37:48,227 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6457 transitions. Word has length 21 [2021-06-05 21:37:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:48,227 INFO L482 AbstractCegarLoop]: Abstraction has 2191 states and 6457 transitions. [2021-06-05 21:37:48,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6457 transitions. [2021-06-05 21:37:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:48,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:48,229 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:48,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39683,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:48,430 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:48,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1237782568, now seen corresponding path program 377 times [2021-06-05 21:37:48,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:48,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758361491] [2021-06-05 21:37:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:48,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:48,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758361491] [2021-06-05 21:37:48,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758361491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:48,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706976642] [2021-06-05 21:37:48,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:48,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:48,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:48,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:48,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706976642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:48,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:48,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:48,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171328797] [2021-06-05 21:37:48,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:48,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:48,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:48,574 INFO L87 Difference]: Start difference. First operand 2191 states and 6457 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:48,652 INFO L93 Difference]: Finished difference Result 2597 states and 7234 transitions. [2021-06-05 21:37:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:37:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:48,654 INFO L225 Difference]: With dead ends: 2597 [2021-06-05 21:37:48,654 INFO L226 Difference]: Without dead ends: 2597 [2021-06-05 21:37:48,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-06-05 21:37:48,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2201. [2021-06-05 21:37:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.945909090909091) internal successors, (6481), 2200 states have internal predecessors, (6481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6481 transitions. [2021-06-05 21:37:48,679 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6481 transitions. Word has length 21 [2021-06-05 21:37:48,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:48,679 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6481 transitions. [2021-06-05 21:37:48,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6481 transitions. [2021-06-05 21:37:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:48,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:48,681 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:48,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39684,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:48,881 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:48,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:48,881 INFO L82 PathProgramCache]: Analyzing trace with hash 577001109, now seen corresponding path program 378 times [2021-06-05 21:37:48,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:48,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819517340] [2021-06-05 21:37:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:48,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:48,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819517340] [2021-06-05 21:37:48,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819517340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:48,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004941396] [2021-06-05 21:37:48,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:48,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:37:48,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:48,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:48,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:48,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004941396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:48,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:48,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:48,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782869650] [2021-06-05 21:37:48,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:48,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:48,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:48,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:48,991 INFO L87 Difference]: Start difference. First operand 2201 states and 6481 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:49,118 INFO L93 Difference]: Finished difference Result 2455 states and 6971 transitions. [2021-06-05 21:37:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:49,121 INFO L225 Difference]: With dead ends: 2455 [2021-06-05 21:37:49,121 INFO L226 Difference]: Without dead ends: 2449 [2021-06-05 21:37:49,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-06-05 21:37:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 2201. [2021-06-05 21:37:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.9454545454545453) internal successors, (6480), 2200 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6480 transitions. [2021-06-05 21:37:49,144 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6480 transitions. Word has length 21 [2021-06-05 21:37:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:49,144 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6480 transitions. [2021-06-05 21:37:49,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:49,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6480 transitions. [2021-06-05 21:37:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:49,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:49,146 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:49,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39685,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:49,346 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1534180504, now seen corresponding path program 379 times [2021-06-05 21:37:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:49,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585466480] [2021-06-05 21:37:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:49,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:49,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585466480] [2021-06-05 21:37:49,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585466480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:49,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976630210] [2021-06-05 21:37:49,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:49,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:49,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:49,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976630210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:49,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:49,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:49,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84416428] [2021-06-05 21:37:49,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:49,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:49,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:49,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:49,468 INFO L87 Difference]: Start difference. First operand 2201 states and 6480 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:49,553 INFO L93 Difference]: Finished difference Result 2588 states and 7244 transitions. [2021-06-05 21:37:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:37:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:49,555 INFO L225 Difference]: With dead ends: 2588 [2021-06-05 21:37:49,555 INFO L226 Difference]: Without dead ends: 2588 [2021-06-05 21:37:49,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-05 21:37:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2203. [2021-06-05 21:37:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.9436875567665757) internal successors, (6482), 2202 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6482 transitions. [2021-06-05 21:37:49,579 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6482 transitions. Word has length 21 [2021-06-05 21:37:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:49,579 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6482 transitions. [2021-06-05 21:37:49,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6482 transitions. [2021-06-05 21:37:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:49,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:49,581 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:49,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39686,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:49,782 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash 148135359, now seen corresponding path program 380 times [2021-06-05 21:37:49,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:49,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503406223] [2021-06-05 21:37:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:49,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:49,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503406223] [2021-06-05 21:37:49,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503406223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:49,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777903815] [2021-06-05 21:37:49,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:49,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:49,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:49,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:49,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:49,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777903815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:49,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:49,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:49,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575790244] [2021-06-05 21:37:49,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:49,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:49,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:49,924 INFO L87 Difference]: Start difference. First operand 2203 states and 6482 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:50,061 INFO L93 Difference]: Finished difference Result 2575 states and 7311 transitions. [2021-06-05 21:37:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:50,064 INFO L225 Difference]: With dead ends: 2575 [2021-06-05 21:37:50,065 INFO L226 Difference]: Without dead ends: 2561 [2021-06-05 21:37:50,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:37:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-06-05 21:37:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2203. [2021-06-05 21:37:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.9432334241598546) internal successors, (6481), 2202 states have internal predecessors, (6481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6481 transitions. [2021-06-05 21:37:50,088 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6481 transitions. Word has length 21 [2021-06-05 21:37:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:50,088 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6481 transitions. [2021-06-05 21:37:50,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6481 transitions. [2021-06-05 21:37:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:50,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:50,090 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:50,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39687,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:50,290 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:50,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1962129368, now seen corresponding path program 381 times [2021-06-05 21:37:50,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:50,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716207850] [2021-06-05 21:37:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:50,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:50,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716207850] [2021-06-05 21:37:50,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716207850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:50,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625525414] [2021-06-05 21:37:50,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:50,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:50,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:50,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:50,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625525414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:50,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:50,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:50,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278902069] [2021-06-05 21:37:50,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:50,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:50,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:50,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:50,441 INFO L87 Difference]: Start difference. First operand 2203 states and 6481 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:50,675 INFO L93 Difference]: Finished difference Result 2783 states and 7906 transitions. [2021-06-05 21:37:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:50,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:50,678 INFO L225 Difference]: With dead ends: 2783 [2021-06-05 21:37:50,678 INFO L226 Difference]: Without dead ends: 2783 [2021-06-05 21:37:50,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:37:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-05 21:37:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2246. [2021-06-05 21:37:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 2.9469933184855233) internal successors, (6616), 2245 states have internal predecessors, (6616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 6616 transitions. [2021-06-05 21:37:50,702 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 6616 transitions. Word has length 21 [2021-06-05 21:37:50,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:50,702 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 6616 transitions. [2021-06-05 21:37:50,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 6616 transitions. [2021-06-05 21:37:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:50,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:50,704 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:50,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39688 [2021-06-05 21:37:50,905 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:50,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1611155303, now seen corresponding path program 382 times [2021-06-05 21:37:50,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:50,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079898786] [2021-06-05 21:37:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:50,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:50,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079898786] [2021-06-05 21:37:50,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079898786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:50,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265984586] [2021-06-05 21:37:50,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:50,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:50,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:50,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:50,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:51,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265984586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:51,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:51,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:51,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876494364] [2021-06-05 21:37:51,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:51,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:51,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:51,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:51,026 INFO L87 Difference]: Start difference. First operand 2246 states and 6616 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:51,183 INFO L93 Difference]: Finished difference Result 2809 states and 7847 transitions. [2021-06-05 21:37:51,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:51,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:51,186 INFO L225 Difference]: With dead ends: 2809 [2021-06-05 21:37:51,186 INFO L226 Difference]: Without dead ends: 2795 [2021-06-05 21:37:51,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:37:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-06-05 21:37:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2250. [2021-06-05 21:37:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 2.94619831036016) internal successors, (6626), 2249 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 6626 transitions. [2021-06-05 21:37:51,210 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 6626 transitions. Word has length 21 [2021-06-05 21:37:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:51,210 INFO L482 AbstractCegarLoop]: Abstraction has 2250 states and 6626 transitions. [2021-06-05 21:37:51,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 6626 transitions. [2021-06-05 21:37:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:51,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:51,212 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:51,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39689 [2021-06-05 21:37:51,413 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:51,413 INFO L82 PathProgramCache]: Analyzing trace with hash 202838706, now seen corresponding path program 383 times [2021-06-05 21:37:51,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:51,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204626260] [2021-06-05 21:37:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:51,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:51,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204626260] [2021-06-05 21:37:51,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204626260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:51,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113952195] [2021-06-05 21:37:51,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:51,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:51,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:51,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:51,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113952195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:51,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:51,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:51,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288860559] [2021-06-05 21:37:51,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:51,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:51,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:51,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:51,542 INFO L87 Difference]: Start difference. First operand 2250 states and 6626 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:51,731 INFO L93 Difference]: Finished difference Result 2507 states and 7160 transitions. [2021-06-05 21:37:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:51,731 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:51,733 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 21:37:51,733 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 21:37:51,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:37:51,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 21:37:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2256. [2021-06-05 21:37:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.946341463414634) internal successors, (6644), 2255 states have internal predecessors, (6644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6644 transitions. [2021-06-05 21:37:51,756 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6644 transitions. Word has length 21 [2021-06-05 21:37:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:51,756 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6644 transitions. [2021-06-05 21:37:51,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6644 transitions. [2021-06-05 21:37:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:51,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:51,758 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:51,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39690 [2021-06-05 21:37:51,958 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:51,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1566443093, now seen corresponding path program 384 times [2021-06-05 21:37:51,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:51,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654339868] [2021-06-05 21:37:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:52,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:52,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654339868] [2021-06-05 21:37:52,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654339868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:52,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319122565] [2021-06-05 21:37:52,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:52,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:37:52,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:52,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:52,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319122565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:52,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:52,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:52,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865755682] [2021-06-05 21:37:52,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:52,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:52,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:52,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:52,086 INFO L87 Difference]: Start difference. First operand 2256 states and 6644 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:52,166 INFO L93 Difference]: Finished difference Result 2564 states and 7327 transitions. [2021-06-05 21:37:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:37:52,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:52,168 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 21:37:52,169 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 21:37:52,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:37:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 21:37:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2256. [2021-06-05 21:37:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.9458980044345897) internal successors, (6643), 2255 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6643 transitions. [2021-06-05 21:37:52,191 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6643 transitions. Word has length 21 [2021-06-05 21:37:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:52,191 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6643 transitions. [2021-06-05 21:37:52,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6643 transitions. [2021-06-05 21:37:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:52,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:52,193 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:52,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39691,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:52,393 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:52,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1947202712, now seen corresponding path program 385 times [2021-06-05 21:37:52,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:52,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956666178] [2021-06-05 21:37:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:52,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:52,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956666178] [2021-06-05 21:37:52,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956666178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:52,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342596863] [2021-06-05 21:37:52,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:52,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:52,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:52,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342596863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:52,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:52,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:52,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063031848] [2021-06-05 21:37:52,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:52,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:52,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:52,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:52,527 INFO L87 Difference]: Start difference. First operand 2256 states and 6643 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:52,748 INFO L93 Difference]: Finished difference Result 2604 states and 7425 transitions. [2021-06-05 21:37:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:37:52,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:52,751 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 21:37:52,751 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 21:37:52,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=384, Invalid=738, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:37:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 21:37:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2270. [2021-06-05 21:37:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 2.9457910973997357) internal successors, (6684), 2269 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 6684 transitions. [2021-06-05 21:37:52,774 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 6684 transitions. Word has length 21 [2021-06-05 21:37:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:52,774 INFO L482 AbstractCegarLoop]: Abstraction has 2270 states and 6684 transitions. [2021-06-05 21:37:52,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 6684 transitions. [2021-06-05 21:37:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:52,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:52,776 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:52,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39692,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:52,976 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1278888389, now seen corresponding path program 386 times [2021-06-05 21:37:52,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:52,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543824751] [2021-06-05 21:37:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:53,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:53,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543824751] [2021-06-05 21:37:53,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543824751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:53,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726524627] [2021-06-05 21:37:53,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:53,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:53,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:53,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:53,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:53,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726524627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:53,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:53,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:53,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064017826] [2021-06-05 21:37:53,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:53,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:53,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:53,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:53,082 INFO L87 Difference]: Start difference. First operand 2270 states and 6684 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:53,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:53,156 INFO L93 Difference]: Finished difference Result 2879 states and 8100 transitions. [2021-06-05 21:37:53,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:37:53,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:53,158 INFO L225 Difference]: With dead ends: 2879 [2021-06-05 21:37:53,158 INFO L226 Difference]: Without dead ends: 2879 [2021-06-05 21:37:53,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-06-05 21:37:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2519. [2021-06-05 21:37:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 2.9785544082605244) internal successors, (7500), 2518 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7500 transitions. [2021-06-05 21:37:53,183 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7500 transitions. Word has length 21 [2021-06-05 21:37:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:53,184 INFO L482 AbstractCegarLoop]: Abstraction has 2519 states and 7500 transitions. [2021-06-05 21:37:53,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7500 transitions. [2021-06-05 21:37:53,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:53,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:53,186 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:53,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39693,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:53,386 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:53,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1197758104, now seen corresponding path program 387 times [2021-06-05 21:37:53,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:53,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191248808] [2021-06-05 21:37:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:53,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:53,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191248808] [2021-06-05 21:37:53,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191248808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:53,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675619837] [2021-06-05 21:37:53,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:53,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:37:53,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:53,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:53,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:53,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675619837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:53,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:53,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:53,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288856488] [2021-06-05 21:37:53,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:53,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:53,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:53,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:53,495 INFO L87 Difference]: Start difference. First operand 2519 states and 7500 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:53,653 INFO L93 Difference]: Finished difference Result 2785 states and 7952 transitions. [2021-06-05 21:37:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:53,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:53,656 INFO L225 Difference]: With dead ends: 2785 [2021-06-05 21:37:53,656 INFO L226 Difference]: Without dead ends: 2783 [2021-06-05 21:37:53,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-05 21:37:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2541. [2021-06-05 21:37:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.984645669291339) internal successors, (7581), 2540 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7581 transitions. [2021-06-05 21:37:53,682 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7581 transitions. Word has length 21 [2021-06-05 21:37:53,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:53,682 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7581 transitions. [2021-06-05 21:37:53,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:53,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7581 transitions. [2021-06-05 21:37:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:53,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:53,684 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:53,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39694,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:53,885 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash 315839103, now seen corresponding path program 388 times [2021-06-05 21:37:53,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:53,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303516848] [2021-06-05 21:37:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:53,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:53,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303516848] [2021-06-05 21:37:53,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303516848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:53,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082041944] [2021-06-05 21:37:53,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:53,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:53,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:53,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:53,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082041944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:53,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:53,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:53,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810917703] [2021-06-05 21:37:53,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:53,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:53,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:53,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:53,992 INFO L87 Difference]: Start difference. First operand 2541 states and 7581 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:54,142 INFO L93 Difference]: Finished difference Result 2878 states and 8139 transitions. [2021-06-05 21:37:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:54,145 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 21:37:54,145 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 21:37:54,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 21:37:54,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2523. [2021-06-05 21:37:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 2.978191911181602) internal successors, (7511), 2522 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 7511 transitions. [2021-06-05 21:37:54,171 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 7511 transitions. Word has length 21 [2021-06-05 21:37:54,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:54,171 INFO L482 AbstractCegarLoop]: Abstraction has 2523 states and 7511 transitions. [2021-06-05 21:37:54,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:54,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 7511 transitions. [2021-06-05 21:37:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:54,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:54,173 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:54,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39695 [2021-06-05 21:37:54,374 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:54,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:54,374 INFO L82 PathProgramCache]: Analyzing trace with hash -345424680, now seen corresponding path program 389 times [2021-06-05 21:37:54,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:54,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412255564] [2021-06-05 21:37:54,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:54,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:54,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412255564] [2021-06-05 21:37:54,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412255564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:54,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90141085] [2021-06-05 21:37:54,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:54,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:37:54,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:54,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:54,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:54,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90141085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:54,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:54,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:54,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227546042] [2021-06-05 21:37:54,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:54,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:54,493 INFO L87 Difference]: Start difference. First operand 2523 states and 7511 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:54,594 INFO L93 Difference]: Finished difference Result 2854 states and 8107 transitions. [2021-06-05 21:37:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:37:54,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:54,597 INFO L225 Difference]: With dead ends: 2854 [2021-06-05 21:37:54,597 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 21:37:54,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:37:54,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 21:37:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2529. [2021-06-05 21:37:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.978243670886076) internal successors, (7529), 2528 states have internal predecessors, (7529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 7529 transitions. [2021-06-05 21:37:54,623 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 7529 transitions. Word has length 21 [2021-06-05 21:37:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:54,623 INFO L482 AbstractCegarLoop]: Abstraction has 2529 states and 7529 transitions. [2021-06-05 21:37:54,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 7529 transitions. [2021-06-05 21:37:54,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:54,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:54,625 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:54,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39696,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:54,826 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:54,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:54,826 INFO L82 PathProgramCache]: Analyzing trace with hash 931503419, now seen corresponding path program 390 times [2021-06-05 21:37:54,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:54,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130826805] [2021-06-05 21:37:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:54,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:54,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130826805] [2021-06-05 21:37:54,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130826805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:54,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447549698] [2021-06-05 21:37:54,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:54,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:37:54,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:54,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:54,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:54,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447549698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:54,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:54,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:54,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577122541] [2021-06-05 21:37:54,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:54,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:54,930 INFO L87 Difference]: Start difference. First operand 2529 states and 7529 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:55,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:55,073 INFO L93 Difference]: Finished difference Result 2971 states and 8408 transitions. [2021-06-05 21:37:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:55,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:55,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:55,076 INFO L225 Difference]: With dead ends: 2971 [2021-06-05 21:37:55,076 INFO L226 Difference]: Without dead ends: 2967 [2021-06-05 21:37:55,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-06-05 21:37:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2529. [2021-06-05 21:37:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.9778481012658227) internal successors, (7528), 2528 states have internal predecessors, (7528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 7528 transitions. [2021-06-05 21:37:55,102 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 7528 transitions. Word has length 21 [2021-06-05 21:37:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:55,103 INFO L482 AbstractCegarLoop]: Abstraction has 2529 states and 7528 transitions. [2021-06-05 21:37:55,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 7528 transitions. [2021-06-05 21:37:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:55,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:55,105 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:55,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39697,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:55,305 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:55,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:55,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1888682814, now seen corresponding path program 391 times [2021-06-05 21:37:55,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:55,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979493185] [2021-06-05 21:37:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:55,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:55,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979493185] [2021-06-05 21:37:55,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979493185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:55,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052620726] [2021-06-05 21:37:55,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:55,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:55,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052620726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:55,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:55,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:55,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455010347] [2021-06-05 21:37:55,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:55,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:55,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:55,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:55,435 INFO L87 Difference]: Start difference. First operand 2529 states and 7528 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:55,570 INFO L93 Difference]: Finished difference Result 2883 states and 8203 transitions. [2021-06-05 21:37:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:37:55,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:55,573 INFO L225 Difference]: With dead ends: 2883 [2021-06-05 21:37:55,573 INFO L226 Difference]: Without dead ends: 2883 [2021-06-05 21:37:55,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:37:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-06-05 21:37:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2549. [2021-06-05 21:37:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.9803767660910516) internal successors, (7594), 2548 states have internal predecessors, (7594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 7594 transitions. [2021-06-05 21:37:55,600 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 7594 transitions. Word has length 21 [2021-06-05 21:37:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:55,600 INFO L482 AbstractCegarLoop]: Abstraction has 2549 states and 7594 transitions. [2021-06-05 21:37:55,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 7594 transitions. [2021-06-05 21:37:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:55,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:55,602 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:55,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39698,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:55,802 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:55,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1457739265, now seen corresponding path program 392 times [2021-06-05 21:37:55,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:55,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611417876] [2021-06-05 21:37:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:55,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:55,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611417876] [2021-06-05 21:37:55,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611417876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:55,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173222216] [2021-06-05 21:37:55,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:55,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:55,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:55,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:55,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:55,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173222216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:55,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:55,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:55,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129202967] [2021-06-05 21:37:55,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:55,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:55,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:55,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:55,906 INFO L87 Difference]: Start difference. First operand 2549 states and 7594 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:56,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:56,051 INFO L93 Difference]: Finished difference Result 2952 states and 8363 transitions. [2021-06-05 21:37:56,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:56,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:56,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:56,055 INFO L225 Difference]: With dead ends: 2952 [2021-06-05 21:37:56,055 INFO L226 Difference]: Without dead ends: 2946 [2021-06-05 21:37:56,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:56,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-06-05 21:37:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2549. [2021-06-05 21:37:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.979984301412873) internal successors, (7593), 2548 states have internal predecessors, (7593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 7593 transitions. [2021-06-05 21:37:56,081 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 7593 transitions. Word has length 21 [2021-06-05 21:37:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:56,081 INFO L482 AbstractCegarLoop]: Abstraction has 2549 states and 7593 transitions. [2021-06-05 21:37:56,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 7593 transitions. [2021-06-05 21:37:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:56,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:56,083 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:56,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39699,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:56,284 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:56,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1785148859, now seen corresponding path program 393 times [2021-06-05 21:37:56,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:56,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340888746] [2021-06-05 21:37:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:56,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:56,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340888746] [2021-06-05 21:37:56,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340888746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:56,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624291276] [2021-06-05 21:37:56,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:56,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:37:56,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:56,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:56,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:56,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624291276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:56,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:56,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:56,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266342426] [2021-06-05 21:37:56,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:56,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:56,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:56,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:56,395 INFO L87 Difference]: Start difference. First operand 2549 states and 7593 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:56,534 INFO L93 Difference]: Finished difference Result 2990 states and 8433 transitions. [2021-06-05 21:37:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:56,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:56,537 INFO L225 Difference]: With dead ends: 2990 [2021-06-05 21:37:56,537 INFO L226 Difference]: Without dead ends: 2982 [2021-06-05 21:37:56,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:56,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-06-05 21:37:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2581. [2021-06-05 21:37:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2580 states have (on average 2.9864341085271318) internal successors, (7705), 2580 states have internal predecessors, (7705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 7705 transitions. [2021-06-05 21:37:56,563 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 7705 transitions. Word has length 21 [2021-06-05 21:37:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:56,564 INFO L482 AbstractCegarLoop]: Abstraction has 2581 states and 7705 transitions. [2021-06-05 21:37:56,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 7705 transitions. [2021-06-05 21:37:56,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:56,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:56,566 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:56,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39700 [2021-06-05 21:37:56,766 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1920192126, now seen corresponding path program 394 times [2021-06-05 21:37:56,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:56,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504446376] [2021-06-05 21:37:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:56,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:56,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504446376] [2021-06-05 21:37:56,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504446376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:56,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615645593] [2021-06-05 21:37:56,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:56,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:56,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:56,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:56,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615645593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:56,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:56,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:56,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714481471] [2021-06-05 21:37:56,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:56,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:56,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:56,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:56,883 INFO L87 Difference]: Start difference. First operand 2581 states and 7705 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:57,038 INFO L93 Difference]: Finished difference Result 2910 states and 8395 transitions. [2021-06-05 21:37:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:37:57,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:57,041 INFO L225 Difference]: With dead ends: 2910 [2021-06-05 21:37:57,041 INFO L226 Difference]: Without dead ends: 2910 [2021-06-05 21:37:57,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-06-05 21:37:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2663. [2021-06-05 21:37:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 2.989105935386927) internal successors, (7957), 2662 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 7957 transitions. [2021-06-05 21:37:57,068 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 7957 transitions. Word has length 21 [2021-06-05 21:37:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:57,068 INFO L482 AbstractCegarLoop]: Abstraction has 2663 states and 7957 transitions. [2021-06-05 21:37:57,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 7957 transitions. [2021-06-05 21:37:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:57,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:57,070 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:57,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39701,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:57,271 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:57,271 INFO L82 PathProgramCache]: Analyzing trace with hash -764534401, now seen corresponding path program 395 times [2021-06-05 21:37:57,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:57,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27470738] [2021-06-05 21:37:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:57,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27470738] [2021-06-05 21:37:57,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27470738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559410703] [2021-06-05 21:37:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:57,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:37:57,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:57,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:57,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:57,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559410703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:57,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:57,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:57,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161155271] [2021-06-05 21:37:57,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:57,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:57,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:57,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:57,382 INFO L87 Difference]: Start difference. First operand 2663 states and 7957 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:57,523 INFO L93 Difference]: Finished difference Result 3615 states and 10212 transitions. [2021-06-05 21:37:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:57,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:57,527 INFO L225 Difference]: With dead ends: 3615 [2021-06-05 21:37:57,527 INFO L226 Difference]: Without dead ends: 3605 [2021-06-05 21:37:57,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:57,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-06-05 21:37:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2661. [2021-06-05 21:37:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 2.9890977443609024) internal successors, (7951), 2660 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 7951 transitions. [2021-06-05 21:37:57,557 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 7951 transitions. Word has length 21 [2021-06-05 21:37:57,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:57,558 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 7951 transitions. [2021-06-05 21:37:57,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 7951 transitions. [2021-06-05 21:37:57,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:57,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:57,560 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:57,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39702 [2021-06-05 21:37:57,760 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:57,760 INFO L82 PathProgramCache]: Analyzing trace with hash -891640232, now seen corresponding path program 396 times [2021-06-05 21:37:57,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:57,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429970811] [2021-06-05 21:37:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:57,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:57,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429970811] [2021-06-05 21:37:57,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429970811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:57,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372622883] [2021-06-05 21:37:57,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:57,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:37:57,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:57,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372622883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:57,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:57,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:57,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929526540] [2021-06-05 21:37:57,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:57,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:57,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:57,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:57,891 INFO L87 Difference]: Start difference. First operand 2661 states and 7951 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:58,021 INFO L93 Difference]: Finished difference Result 3050 states and 8892 transitions. [2021-06-05 21:37:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:37:58,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:58,024 INFO L225 Difference]: With dead ends: 3050 [2021-06-05 21:37:58,024 INFO L226 Difference]: Without dead ends: 3050 [2021-06-05 21:37:58,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-06-05 21:37:58,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 2842. [2021-06-05 21:37:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9922562478000705) internal successors, (8501), 2841 states have internal predecessors, (8501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8501 transitions. [2021-06-05 21:37:58,052 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8501 transitions. Word has length 21 [2021-06-05 21:37:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:58,053 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 8501 transitions. [2021-06-05 21:37:58,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8501 transitions. [2021-06-05 21:37:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:58,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:58,055 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:58,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39703 [2021-06-05 21:37:58,255 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:58,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1799663163, now seen corresponding path program 397 times [2021-06-05 21:37:58,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:58,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375079873] [2021-06-05 21:37:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:58,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:58,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375079873] [2021-06-05 21:37:58,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375079873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:58,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837840091] [2021-06-05 21:37:58,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:58,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:58,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837840091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:58,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:58,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:58,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38985136] [2021-06-05 21:37:58,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:58,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:58,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:58,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:58,369 INFO L87 Difference]: Start difference. First operand 2842 states and 8501 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:58,512 INFO L93 Difference]: Finished difference Result 3614 states and 10275 transitions. [2021-06-05 21:37:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:37:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:58,515 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 21:37:58,515 INFO L226 Difference]: Without dead ends: 3602 [2021-06-05 21:37:58,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2021-06-05 21:37:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 2842. [2021-06-05 21:37:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9915522703273494) internal successors, (8499), 2841 states have internal predecessors, (8499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8499 transitions. [2021-06-05 21:37:58,546 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8499 transitions. Word has length 21 [2021-06-05 21:37:58,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:58,546 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 8499 transitions. [2021-06-05 21:37:58,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8499 transitions. [2021-06-05 21:37:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:58,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:58,549 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:58,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39704 [2021-06-05 21:37:58,749 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:58,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:58,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2135869886, now seen corresponding path program 398 times [2021-06-05 21:37:58,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:58,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943435363] [2021-06-05 21:37:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:58,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943435363] [2021-06-05 21:37:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943435363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442192769] [2021-06-05 21:37:58,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:58,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:58,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:58,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:58,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:58,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442192769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:58,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:58,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:37:58,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702793653] [2021-06-05 21:37:58,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:58,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:58,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:58,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:58,870 INFO L87 Difference]: Start difference. First operand 2842 states and 8499 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:58,959 INFO L93 Difference]: Finished difference Result 2996 states and 8829 transitions. [2021-06-05 21:37:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:37:58,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:58,962 INFO L225 Difference]: With dead ends: 2996 [2021-06-05 21:37:58,962 INFO L226 Difference]: Without dead ends: 2996 [2021-06-05 21:37:58,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2021-06-05 21:37:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2879. [2021-06-05 21:37:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.991660875608061) internal successors, (8610), 2878 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 8610 transitions. [2021-06-05 21:37:58,989 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 8610 transitions. Word has length 21 [2021-06-05 21:37:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:58,989 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 8610 transitions. [2021-06-05 21:37:58,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 8610 transitions. [2021-06-05 21:37:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:58,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:58,992 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:59,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39705 [2021-06-05 21:37:59,192 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:59,192 INFO L82 PathProgramCache]: Analyzing trace with hash -314590977, now seen corresponding path program 399 times [2021-06-05 21:37:59,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:59,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46507275] [2021-06-05 21:37:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:59,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:59,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46507275] [2021-06-05 21:37:59,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46507275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:59,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816764515] [2021-06-05 21:37:59,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:59,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:37:59,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:59,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:59,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:59,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816764515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:59,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:59,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:59,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208464227] [2021-06-05 21:37:59,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:59,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:59,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:59,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:59,317 INFO L87 Difference]: Start difference. First operand 2879 states and 8610 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:59,470 INFO L93 Difference]: Finished difference Result 3624 states and 10338 transitions. [2021-06-05 21:37:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:59,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:59,474 INFO L225 Difference]: With dead ends: 3624 [2021-06-05 21:37:59,474 INFO L226 Difference]: Without dead ends: 3610 [2021-06-05 21:37:59,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-06-05 21:37:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2900. [2021-06-05 21:37:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 2.9913763366678165) internal successors, (8672), 2899 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 8672 transitions. [2021-06-05 21:37:59,507 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 8672 transitions. Word has length 21 [2021-06-05 21:37:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:59,507 INFO L482 AbstractCegarLoop]: Abstraction has 2900 states and 8672 transitions. [2021-06-05 21:37:59,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 8672 transitions. [2021-06-05 21:37:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:37:59,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:59,510 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:59,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39706,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:59,710 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1499403032, now seen corresponding path program 400 times [2021-06-05 21:37:59,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:59,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247910393] [2021-06-05 21:37:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:59,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:59,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247910393] [2021-06-05 21:37:59,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247910393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:59,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108677607] [2021-06-05 21:37:59,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:59,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:59,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:59,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:37:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:59,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108677607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:59,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:59,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:37:59,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561995204] [2021-06-05 21:37:59,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:59,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:59,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:59,837 INFO L87 Difference]: Start difference. First operand 2900 states and 8672 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:59,982 INFO L93 Difference]: Finished difference Result 3081 states and 9020 transitions. [2021-06-05 21:37:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:37:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:37:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:59,985 INFO L225 Difference]: With dead ends: 3081 [2021-06-05 21:37:59,985 INFO L226 Difference]: Without dead ends: 3081 [2021-06-05 21:37:59,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-06-05 21:38:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2899. [2021-06-05 21:38:00,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 2.9913733609385784) internal successors, (8669), 2898 states have internal predecessors, (8669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 8669 transitions. [2021-06-05 21:38:00,014 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 8669 transitions. Word has length 21 [2021-06-05 21:38:00,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:00,014 INFO L482 AbstractCegarLoop]: Abstraction has 2899 states and 8669 transitions. [2021-06-05 21:38:00,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 8669 transitions. [2021-06-05 21:38:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:38:00,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:00,016 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:00,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39707 [2021-06-05 21:38:00,217 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:00,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:00,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1431959877, now seen corresponding path program 401 times [2021-06-05 21:38:00,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:00,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892626890] [2021-06-05 21:38:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:00,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:00,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892626890] [2021-06-05 21:38:00,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892626890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:00,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605323714] [2021-06-05 21:38:00,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:00,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:38:00,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:00,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:38:00,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:00,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605323714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:00,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:00,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:38:00,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503406137] [2021-06-05 21:38:00,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:00,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:00,343 INFO L87 Difference]: Start difference. First operand 2899 states and 8669 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:00,425 INFO L93 Difference]: Finished difference Result 3250 states and 9452 transitions. [2021-06-05 21:38:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:38:00,425 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:38:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:00,428 INFO L225 Difference]: With dead ends: 3250 [2021-06-05 21:38:00,428 INFO L226 Difference]: Without dead ends: 3234 [2021-06-05 21:38:00,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:38:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-06-05 21:38:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2899. [2021-06-05 21:38:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 2.9910282953761214) internal successors, (8668), 2898 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 8668 transitions. [2021-06-05 21:38:00,457 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 8668 transitions. Word has length 21 [2021-06-05 21:38:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:00,457 INFO L482 AbstractCegarLoop]: Abstraction has 2899 states and 8668 transitions. [2021-06-05 21:38:00,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 8668 transitions. [2021-06-05 21:38:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:38:00,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:00,459 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:00,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39708,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:00,660 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:00,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:00,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1051200258, now seen corresponding path program 402 times [2021-06-05 21:38:00,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:00,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687096750] [2021-06-05 21:38:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:00,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:00,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687096750] [2021-06-05 21:38:00,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687096750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:00,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710326534] [2021-06-05 21:38:00,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:00,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:38:00,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:00,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:38:00,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:00,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710326534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:00,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:00,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:38:00,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268563354] [2021-06-05 21:38:00,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:00,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:00,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:00,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:00,794 INFO L87 Difference]: Start difference. First operand 2899 states and 8668 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:00,976 INFO L93 Difference]: Finished difference Result 3186 states and 9298 transitions. [2021-06-05 21:38:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:38:00,977 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:38:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:00,980 INFO L225 Difference]: With dead ends: 3186 [2021-06-05 21:38:00,980 INFO L226 Difference]: Without dead ends: 3186 [2021-06-05 21:38:00,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:38:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-06-05 21:38:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2911. [2021-06-05 21:38:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 2.99106529209622) internal successors, (8704), 2910 states have internal predecessors, (8704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 8704 transitions. [2021-06-05 21:38:01,008 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 8704 transitions. Word has length 21 [2021-06-05 21:38:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:01,008 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 8704 transitions. [2021-06-05 21:38:01,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 8704 transitions. [2021-06-05 21:38:01,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:38:01,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:01,010 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:01,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39709,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:01,211 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:01,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:01,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1710657409, now seen corresponding path program 403 times [2021-06-05 21:38:01,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:01,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860389420] [2021-06-05 21:38:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:01,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:01,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860389420] [2021-06-05 21:38:01,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860389420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:01,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189863861] [2021-06-05 21:38:01,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:01,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:38:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:01,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189863861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:01,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:01,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:38:01,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533219100] [2021-06-05 21:38:01,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:01,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:01,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:01,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:01,341 INFO L87 Difference]: Start difference. First operand 2911 states and 8704 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:01,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:01,414 INFO L93 Difference]: Finished difference Result 3241 states and 9439 transitions. [2021-06-05 21:38:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:38:01,414 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:38:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:01,417 INFO L225 Difference]: With dead ends: 3241 [2021-06-05 21:38:01,417 INFO L226 Difference]: Without dead ends: 3223 [2021-06-05 21:38:01,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:38:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-06-05 21:38:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 2909. [2021-06-05 21:38:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 2908 states have (on average 2.9917469050894083) internal successors, (8700), 2908 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 8700 transitions. [2021-06-05 21:38:01,445 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 8700 transitions. Word has length 21 [2021-06-05 21:38:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:01,445 INFO L482 AbstractCegarLoop]: Abstraction has 2909 states and 8700 transitions. [2021-06-05 21:38:01,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 8700 transitions. [2021-06-05 21:38:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:38:01,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:01,447 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:01,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39710 [2021-06-05 21:38:01,648 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:01,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1484476376, now seen corresponding path program 404 times [2021-06-05 21:38:01,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:01,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130963554] [2021-06-05 21:38:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:01,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130963554] [2021-06-05 21:38:01,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130963554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237377186] [2021-06-05 21:38:01,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:01,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:38:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:38:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:01,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237377186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:01,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:01,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:38:01,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379164768] [2021-06-05 21:38:01,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:01,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:01,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:01,824 INFO L87 Difference]: Start difference. First operand 2909 states and 8700 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:02,034 INFO L93 Difference]: Finished difference Result 3418 states and 9945 transitions. [2021-06-05 21:38:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:38:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:38:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:02,037 INFO L225 Difference]: With dead ends: 3418 [2021-06-05 21:38:02,037 INFO L226 Difference]: Without dead ends: 3418 [2021-06-05 21:38:02,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:38:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-06-05 21:38:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2927. [2021-06-05 21:38:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 2.9907723855092274) internal successors, (8751), 2926 states have internal predecessors, (8751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 8751 transitions. [2021-06-05 21:38:02,066 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 8751 transitions. Word has length 21 [2021-06-05 21:38:02,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:02,066 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 8751 transitions. [2021-06-05 21:38:02,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:02,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 8751 transitions. [2021-06-05 21:38:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:02,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:02,069 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:02,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39711 [2021-06-05 21:38:02,269 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:02,269 INFO L82 PathProgramCache]: Analyzing trace with hash -857679500, now seen corresponding path program 405 times [2021-06-05 21:38:02,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:02,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625770579] [2021-06-05 21:38:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:02,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:02,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625770579] [2021-06-05 21:38:02,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625770579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:02,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212261554] [2021-06-05 21:38:02,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:02,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:38:02,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:02,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:38:02,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:02,934 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:38:02,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:38:02,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:38:04,350 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 427 [2021-06-05 21:38:04,642 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 503 [2021-06-05 21:38:04,939 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 503 [2021-06-05 21:38:05,271 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 511 [2021-06-05 21:38:05,658 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 538 [2021-06-05 21:38:05,942 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 305 [2021-06-05 21:38:06,621 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 392 [2021-06-05 21:38:06,838 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 392 [2021-06-05 21:38:07,095 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 402 [2021-06-05 21:38:07,274 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 417 [2021-06-05 21:38:07,642 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 353 [2021-06-05 21:38:08,202 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 222 [2021-06-05 21:38:08,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:38:08,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:38:08,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:38:08,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:38:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:08,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212261554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:08,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:08,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 21:38:08,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279111768] [2021-06-05 21:38:08,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:38:08,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:08,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:38:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:38:08,766 INFO L87 Difference]: Start difference. First operand 2927 states and 8751 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:09,236 INFO L93 Difference]: Finished difference Result 3024 states and 8948 transitions. [2021-06-05 21:38:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:38:09,237 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:09,240 INFO L225 Difference]: With dead ends: 3024 [2021-06-05 21:38:09,240 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 21:38:09,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 551.6ms TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:38:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 21:38:09,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2948. [2021-06-05 21:38:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 2.98982015609094) internal successors, (8811), 2947 states have internal predecessors, (8811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 8811 transitions. [2021-06-05 21:38:09,269 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 8811 transitions. Word has length 22 [2021-06-05 21:38:09,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:09,269 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 8811 transitions. [2021-06-05 21:38:09,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 8811 transitions. [2021-06-05 21:38:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:09,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:09,271 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:09,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39712 [2021-06-05 21:38:09,472 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash -599146780, now seen corresponding path program 406 times [2021-06-05 21:38:09,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:09,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655104376] [2021-06-05 21:38:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:09,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:09,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655104376] [2021-06-05 21:38:09,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655104376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:09,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070212697] [2021-06-05 21:38:09,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:09,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:38:09,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:09,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:38:09,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:10,083 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:38:10,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:38:10,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:38:11,067 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 289 [2021-06-05 21:38:11,274 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 309 [2021-06-05 21:38:11,450 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 309 [2021-06-05 21:38:11,651 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 317 [2021-06-05 21:38:11,768 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 324 [2021-06-05 21:38:12,080 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 400 [2021-06-05 21:38:12,303 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 291 [2021-06-05 21:38:12,470 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 292 [2021-06-05 21:38:12,973 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 216 [2021-06-05 21:38:13,159 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 243 [2021-06-05 21:38:13,413 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 337 [2021-06-05 21:38:13,683 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 358 [2021-06-05 21:38:13,952 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 358 [2021-06-05 21:38:14,247 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 364 [2021-06-05 21:38:14,502 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 368 [2021-06-05 21:38:15,474 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 254 [2021-06-05 21:38:16,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:38:16,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:38:16,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:38:16,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:38:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:16,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070212697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:16,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:16,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 21:38:16,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354723210] [2021-06-05 21:38:16,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:38:16,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:38:16,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:38:16,822 INFO L87 Difference]: Start difference. First operand 2948 states and 8811 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:17,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:17,179 INFO L93 Difference]: Finished difference Result 3054 states and 9036 transitions. [2021-06-05 21:38:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:38:17,180 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:17,183 INFO L225 Difference]: With dead ends: 3054 [2021-06-05 21:38:17,183 INFO L226 Difference]: Without dead ends: 3038 [2021-06-05 21:38:17,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:38:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-06-05 21:38:17,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2970. [2021-06-05 21:38:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.9932637251599865) internal successors, (8887), 2969 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 8887 transitions. [2021-06-05 21:38:17,212 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 8887 transitions. Word has length 22 [2021-06-05 21:38:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:17,212 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 8887 transitions. [2021-06-05 21:38:17,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 8887 transitions. [2021-06-05 21:38:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:17,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:17,215 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:17,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40164 [2021-06-05 21:38:17,415 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:17,415 INFO L82 PathProgramCache]: Analyzing trace with hash 144436580, now seen corresponding path program 407 times [2021-06-05 21:38:17,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:17,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486820426] [2021-06-05 21:38:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:17,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:17,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486820426] [2021-06-05 21:38:17,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486820426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:17,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066398014] [2021-06-05 21:38:17,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:17,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:38:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:17,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:38:17,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:18,013 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:38:18,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:38:18,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:38:18,782 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 344 [2021-06-05 21:38:19,482 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 328 [2021-06-05 21:38:19,803 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 564 [2021-06-05 21:38:20,139 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 564 [2021-06-05 21:38:20,518 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 577 [2021-06-05 21:38:21,100 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 742 [2021-06-05 21:38:21,391 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 273 [2021-06-05 21:38:22,155 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 172 [2021-06-05 21:38:22,309 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 191 [2021-06-05 21:38:22,519 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 290 [2021-06-05 21:38:22,626 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 491 [2021-06-05 21:38:22,858 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 278 [2021-06-05 21:38:23,717 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 278 [2021-06-05 21:38:23,945 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 352 [2021-06-05 21:38:24,057 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 224 [2021-06-05 21:38:25,180 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 324 [2021-06-05 21:38:25,384 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 334 [2021-06-05 21:38:25,686 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 372 [2021-06-05 21:38:26,270 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 906 DAG size of output: 642 [2021-06-05 21:38:27,175 WARN L205 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 767 [2021-06-05 21:38:28,079 WARN L205 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 767 [2021-06-05 21:38:29,065 WARN L205 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 1211 DAG size of output: 773 [2021-06-05 21:38:29,667 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 624 [2021-06-05 21:38:29,820 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 418 [2021-06-05 21:38:29,982 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 270 [2021-06-05 21:38:30,737 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 248 [2021-06-05 21:38:30,869 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 248 [2021-06-05 21:38:31,016 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 511 DAG size of output: 252 [2021-06-05 21:38:31,211 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 301 [2021-06-05 21:38:31,566 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 239 [2021-06-05 21:38:32,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:38:32,818 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 21:38:32,818 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 21:38:32,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 21:38:33,609 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 290 [2021-06-05 21:38:33,777 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 290 [2021-06-05 21:38:33,951 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 306 [2021-06-05 21:38:34,190 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 383 [2021-06-05 21:38:34,451 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 377 [2021-06-05 21:38:34,744 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 381 [2021-06-05 21:38:34,934 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 289 [2021-06-05 21:38:36,115 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 224 [2021-06-05 21:38:37,117 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 233 [2021-06-05 21:38:37,457 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 375 [2021-06-05 21:38:38,653 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 318 [2021-06-05 21:38:39,644 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 263 [2021-06-05 21:38:39,986 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 424 [2021-06-05 21:38:40,753 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 706 [2021-06-05 21:38:41,689 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 1141 DAG size of output: 726 [2021-06-05 21:38:42,888 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 1313 DAG size of output: 869 [2021-06-05 21:38:44,327 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 1375 DAG size of output: 917 [2021-06-05 21:38:46,133 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 1507 DAG size of output: 1013 [2021-06-05 21:38:48,298 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 1655 DAG size of output: 1120 [2021-06-05 21:38:50,453 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 1655 DAG size of output: 1120 [2021-06-05 21:38:52,854 WARN L205 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 1661 DAG size of output: 1107 [2021-06-05 21:38:56,104 WARN L205 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 1109 DAG size of output: 1377 [2021-06-05 21:38:56,265 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 822 DAG size of output: 752 [2021-06-05 21:38:57,601 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 722 DAG size of output: 745 [2021-06-05 21:38:57,818 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 332 [2021-06-05 21:38:58,464 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 218 [2021-06-05 21:38:58,591 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 237 [2021-06-05 21:38:58,828 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 402 [2021-06-05 21:38:59,412 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 270 [2021-06-05 21:38:59,582 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 281 [2021-06-05 21:38:59,865 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 319 [2021-06-05 21:39:00,174 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 338 [2021-06-05 21:39:00,551 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 410 [2021-06-05 21:39:01,017 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 439 [2021-06-05 21:39:01,186 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 933 [2021-06-05 21:39:01,365 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 865 [2021-06-05 21:39:03,218 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 835 DAG size of output: 1011 [2021-06-05 21:39:03,325 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 695 [2021-06-05 21:39:04,306 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 391 [2021-06-05 21:39:04,549 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 395 [2021-06-05 21:39:04,668 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 218 [2021-06-05 21:39:05,202 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 734 DAG size of output: 520 [2021-06-05 21:39:05,783 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 800 DAG size of output: 564 [2021-06-05 21:39:06,497 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 217 [2021-06-05 21:39:06,799 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 284 [2021-06-05 21:39:06,992 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 329 [2021-06-05 21:39:07,640 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 1167 DAG size of output: 654 [2021-06-05 21:39:08,394 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 1198 DAG size of output: 683 [2021-06-05 21:39:09,161 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 1200 DAG size of output: 685 [2021-06-05 21:39:10,420 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 1640 DAG size of output: 908 [2021-06-05 21:39:11,683 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 1640 DAG size of output: 908 [2021-06-05 21:39:13,094 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1643 DAG size of output: 908 [2021-06-05 21:39:13,998 WARN L205 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 910 DAG size of output: 673 [2021-06-05 21:39:14,280 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 324 [2021-06-05 21:39:15,038 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 332 [2021-06-05 21:39:15,248 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 332 [2021-06-05 21:39:15,463 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 324 [2021-06-05 21:39:16,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:39:16,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:39:16,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:39:16,168 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:39:16,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:39:16,169 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 21:39:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:16,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066398014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:16,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:16,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 21:39:16,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777594125] [2021-06-05 21:39:16,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:39:16,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:16,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:39:16,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:16,201 INFO L87 Difference]: Start difference. First operand 2970 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:16,546 INFO L93 Difference]: Finished difference Result 3077 states and 9090 transitions. [2021-06-05 21:39:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:39:16,546 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:16,549 INFO L225 Difference]: With dead ends: 3077 [2021-06-05 21:39:16,549 INFO L226 Difference]: Without dead ends: 3067 [2021-06-05 21:39:16,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:39:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2021-06-05 21:39:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2970. [2021-06-05 21:39:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.9932637251599865) internal successors, (8887), 2969 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 8887 transitions. [2021-06-05 21:39:16,579 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 8887 transitions. Word has length 22 [2021-06-05 21:39:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:16,580 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 8887 transitions. [2021-06-05 21:39:16,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 8887 transitions. [2021-06-05 21:39:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:16,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:16,582 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:16,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40835,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:16,783 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:16,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:16,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1666470026, now seen corresponding path program 408 times [2021-06-05 21:39:16,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:16,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210645196] [2021-06-05 21:39:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:16,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210645196] [2021-06-05 21:39:16,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210645196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:16,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291413545] [2021-06-05 21:39:16,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:16,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:39:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:16,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:39:16,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:17,409 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:39:17,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:39:17,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:39:18,131 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 279 [2021-06-05 21:39:18,271 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 279 [2021-06-05 21:39:18,460 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 292 [2021-06-05 21:39:18,737 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 384 [2021-06-05 21:39:18,965 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 295 [2021-06-05 21:39:19,628 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 267 [2021-06-05 21:39:20,037 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 353 [2021-06-05 21:39:20,329 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 448 [2021-06-05 21:39:20,624 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 301 [2021-06-05 21:39:21,457 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 277 [2021-06-05 21:39:21,703 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 280 [2021-06-05 21:39:22,275 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 593 [2021-06-05 21:39:22,859 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 593 [2021-06-05 21:39:23,496 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 602 [2021-06-05 21:39:24,151 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 732 [2021-06-05 21:39:24,459 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 442 [2021-06-05 21:39:24,703 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 327 [2021-06-05 21:39:25,311 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 303 [2021-06-05 21:39:25,555 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 433 [2021-06-05 21:39:25,871 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 470 [2021-06-05 21:39:26,206 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 470 [2021-06-05 21:39:26,549 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 474 [2021-06-05 21:39:26,889 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 410 [2021-06-05 21:39:27,088 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 335 [2021-06-05 21:39:27,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:39:27,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:39:27,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:39:27,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:39:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:27,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291413545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:27,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:27,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 21:39:27,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729653066] [2021-06-05 21:39:27,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:39:27,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:39:27,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:27,668 INFO L87 Difference]: Start difference. First operand 2970 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:28,198 INFO L93 Difference]: Finished difference Result 3120 states and 9276 transitions. [2021-06-05 21:39:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:39:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:28,202 INFO L225 Difference]: With dead ends: 3120 [2021-06-05 21:39:28,202 INFO L226 Difference]: Without dead ends: 3104 [2021-06-05 21:39:28,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:39:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-05 21:39:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3030. [2021-06-05 21:39:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.004291845493562) internal successors, (9100), 3029 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:28,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 9100 transitions. [2021-06-05 21:39:28,232 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 9100 transitions. Word has length 22 [2021-06-05 21:39:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:28,232 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 9100 transitions. [2021-06-05 21:39:28,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:28,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 9100 transitions. [2021-06-05 21:39:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:28,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:28,235 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:28,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43471 [2021-06-05 21:39:28,435 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1884913910, now seen corresponding path program 409 times [2021-06-05 21:39:28,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:28,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372145569] [2021-06-05 21:39:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:28,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:28,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372145569] [2021-06-05 21:39:28,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372145569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:28,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817977276] [2021-06-05 21:39:28,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:28,580 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:39:28,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:29,036 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:39:29,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:39:29,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:39:29,708 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 299 [2021-06-05 21:39:29,857 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 308 [2021-06-05 21:39:30,041 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 327 [2021-06-05 21:39:30,223 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 327 [2021-06-05 21:39:30,440 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 340 [2021-06-05 21:39:30,632 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 429 [2021-06-05 21:39:30,764 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 249 [2021-06-05 21:39:30,905 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 179 [2021-06-05 21:39:31,345 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 200 [2021-06-05 21:39:31,522 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 174 [2021-06-05 21:39:31,854 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 252 [2021-06-05 21:39:32,243 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 432 [2021-06-05 21:39:32,686 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 382 [2021-06-05 21:39:33,040 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 264 [2021-06-05 21:39:33,713 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 249 [2021-06-05 21:39:33,935 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 339 [2021-06-05 21:39:34,365 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 377 [2021-06-05 21:39:34,798 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 552 [2021-06-05 21:39:35,367 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 332 [2021-06-05 21:39:35,479 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 228 [2021-06-05 21:39:36,039 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 209 [2021-06-05 21:39:36,575 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 269 [2021-06-05 21:39:36,778 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 312 [2021-06-05 21:39:37,517 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 1029 DAG size of output: 698 [2021-06-05 21:39:38,410 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 848 [2021-06-05 21:39:39,303 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 848 [2021-06-05 21:39:40,244 WARN L205 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 1311 DAG size of output: 854 [2021-06-05 21:39:40,796 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 856 DAG size of output: 874 [2021-06-05 21:39:41,693 WARN L205 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 795 [2021-06-05 21:39:42,535 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 356 [2021-06-05 21:39:42,771 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 821 DAG size of output: 411 [2021-06-05 21:39:43,008 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 821 DAG size of output: 411 [2021-06-05 21:39:43,272 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 826 DAG size of output: 416 [2021-06-05 21:39:43,546 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 503 [2021-06-05 21:39:43,852 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 363 [2021-06-05 21:39:44,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:39:45,146 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 21:39:45,146 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 21:39:45,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 21:39:45,947 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 244 [2021-06-05 21:39:46,551 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 253 [2021-06-05 21:39:47,254 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 366 [2021-06-05 21:39:47,578 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 405 [2021-06-05 21:39:47,706 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 249 [2021-06-05 21:39:48,263 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 236 [2021-06-05 21:39:48,444 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 258 [2021-06-05 21:39:48,592 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 226 [2021-06-05 21:39:49,250 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 281 [2021-06-05 21:39:49,593 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 422 [2021-06-05 21:39:50,201 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 600 [2021-06-05 21:39:50,933 WARN L205 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 622 [2021-06-05 21:39:51,654 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 622 [2021-06-05 21:39:52,465 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 896 DAG size of output: 601 [2021-06-05 21:39:53,351 WARN L205 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 829 [2021-06-05 21:39:54,248 WARN L205 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 731 [2021-06-05 21:39:54,786 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 252 [2021-06-05 21:39:55,373 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 270 [2021-06-05 21:39:55,844 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 516 [2021-06-05 21:39:56,359 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 209 [2021-06-05 21:39:56,927 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 372 [2021-06-05 21:39:57,153 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 372 [2021-06-05 21:39:57,420 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 780 DAG size of output: 300 [2021-06-05 21:39:58,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:39:58,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:39:58,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:39:58,306 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:39:58,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:39:58,307 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 21:39:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:58,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817977276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:58,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:58,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 21:39:58,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478456656] [2021-06-05 21:39:58,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:39:58,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:58,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:39:58,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:58,339 INFO L87 Difference]: Start difference. First operand 3030 states and 9100 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:59,012 INFO L93 Difference]: Finished difference Result 3170 states and 9379 transitions. [2021-06-05 21:39:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:39:59,012 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:59,015 INFO L225 Difference]: With dead ends: 3170 [2021-06-05 21:39:59,015 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 21:39:59,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:39:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 21:39:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 3027. [2021-06-05 21:39:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3026 states have (on average 3.0023132848645075) internal successors, (9085), 3026 states have internal predecessors, (9085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 9085 transitions. [2021-06-05 21:39:59,046 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 9085 transitions. Word has length 22 [2021-06-05 21:39:59,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:59,046 INFO L482 AbstractCegarLoop]: Abstraction has 3027 states and 9085 transitions. [2021-06-05 21:39:59,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 9085 transitions. [2021-06-05 21:39:59,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:59,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:59,048 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:59,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44029 [2021-06-05 21:39:59,249 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:59,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:59,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1033769778, now seen corresponding path program 410 times [2021-06-05 21:39:59,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:59,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83897681] [2021-06-05 21:39:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:59,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:59,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83897681] [2021-06-05 21:39:59,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83897681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:59,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090729310] [2021-06-05 21:39:59,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:59,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:39:59,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:59,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:39:59,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:59,854 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:39:59,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:39:59,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:40:00,555 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 250 [2021-06-05 21:40:00,670 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 250 [2021-06-05 21:40:00,807 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 263 [2021-06-05 21:40:01,116 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 295 [2021-06-05 21:40:01,862 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 216 [2021-06-05 21:40:02,458 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 289 [2021-06-05 21:40:02,741 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 334 [2021-06-05 21:40:03,703 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 256 [2021-06-05 21:40:04,485 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 355 [2021-06-05 21:40:04,875 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 483 [2021-06-05 21:40:05,349 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 486 [2021-06-05 21:40:06,240 WARN L205 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 660 [2021-06-05 21:40:07,134 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 660 [2021-06-05 21:40:08,103 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 668 [2021-06-05 21:40:08,301 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 697 [2021-06-05 21:40:09,287 WARN L205 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 766 [2021-06-05 21:40:09,690 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 323 [2021-06-05 21:40:10,272 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 390 [2021-06-05 21:40:10,537 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 390 [2021-06-05 21:40:10,820 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 394 [2021-06-05 21:40:11,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:40:12,105 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 21:40:12,106 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 21:40:12,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 21:40:12,677 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 222 [2021-06-05 21:40:12,780 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 240 [2021-06-05 21:40:12,906 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 257 [2021-06-05 21:40:13,031 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 257 [2021-06-05 21:40:13,182 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 268 [2021-06-05 21:40:13,460 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 360 [2021-06-05 21:40:13,615 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 246 [2021-06-05 21:40:14,280 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 293 [2021-06-05 21:40:14,424 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 293 [2021-06-05 21:40:14,592 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 297 [2021-06-05 21:40:14,813 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 347 [2021-06-05 21:40:15,964 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 213 [2021-06-05 21:40:16,085 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 184 [2021-06-05 21:40:16,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:40:16,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:40:16,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:40:16,525 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:40:16,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:40:16,526 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 21:40:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:16,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090729310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:16,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:16,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 21:40:16,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407404267] [2021-06-05 21:40:16,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:40:16,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:16,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:40:16,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:40:16,557 INFO L87 Difference]: Start difference. First operand 3027 states and 9085 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:16,940 INFO L93 Difference]: Finished difference Result 3114 states and 9269 transitions. [2021-06-05 21:40:16,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:40:16,940 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:16,943 INFO L225 Difference]: With dead ends: 3114 [2021-06-05 21:40:16,943 INFO L226 Difference]: Without dead ends: 3104 [2021-06-05 21:40:16,944 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:40:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-05 21:40:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3030. [2021-06-05 21:40:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.0023109937273027) internal successors, (9094), 3029 states have internal predecessors, (9094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 9094 transitions. [2021-06-05 21:40:16,975 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 9094 transitions. Word has length 22 [2021-06-05 21:40:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:16,975 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 9094 transitions. [2021-06-05 21:40:16,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 9094 transitions. [2021-06-05 21:40:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:16,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:16,977 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:17,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45381 [2021-06-05 21:40:17,178 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:17,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:17,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1113853020, now seen corresponding path program 411 times [2021-06-05 21:40:17,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:17,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399402594] [2021-06-05 21:40:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:17,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:17,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399402594] [2021-06-05 21:40:17,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399402594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:17,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709221173] [2021-06-05 21:40:17,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:17,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:40:17,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:17,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:40:17,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:17,799 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:40:17,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:40:17,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:40:18,510 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 229 [2021-06-05 21:40:19,136 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 212 [2021-06-05 21:40:19,242 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 214 [2021-06-05 21:40:20,155 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 272 [2021-06-05 21:40:20,308 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 279 [2021-06-05 21:40:20,619 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 407 [2021-06-05 21:40:20,951 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 407 [2021-06-05 21:40:21,297 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 623 DAG size of output: 416 [2021-06-05 21:40:21,465 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 386 [2021-06-05 21:40:21,949 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 248 [2021-06-05 21:40:22,073 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 248 [2021-06-05 21:40:22,285 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 306 [2021-06-05 21:40:23,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:40:23,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:40:23,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:40:23,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:40:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:23,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709221173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:23,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:23,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 21:40:23,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356767264] [2021-06-05 21:40:23,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:40:23,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:23,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:40:23,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:40:23,179 INFO L87 Difference]: Start difference. First operand 3030 states and 9094 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:23,565 INFO L93 Difference]: Finished difference Result 3173 states and 9458 transitions. [2021-06-05 21:40:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:40:23,565 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:23,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:23,568 INFO L225 Difference]: With dead ends: 3173 [2021-06-05 21:40:23,568 INFO L226 Difference]: Without dead ends: 3157 [2021-06-05 21:40:23,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:40:23,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-06-05 21:40:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3081. [2021-06-05 21:40:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 3.0107142857142857) internal successors, (9273), 3080 states have internal predecessors, (9273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 9273 transitions. [2021-06-05 21:40:23,599 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 9273 transitions. Word has length 22 [2021-06-05 21:40:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:23,599 INFO L482 AbstractCegarLoop]: Abstraction has 3081 states and 9273 transitions. [2021-06-05 21:40:23,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 9273 transitions. [2021-06-05 21:40:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:23,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:23,601 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:23,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46366,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:23,802 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:23,802 INFO L82 PathProgramCache]: Analyzing trace with hash -370269660, now seen corresponding path program 412 times [2021-06-05 21:40:23,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:23,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295242851] [2021-06-05 21:40:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:23,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:23,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295242851] [2021-06-05 21:40:23,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295242851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:23,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062714700] [2021-06-05 21:40:23,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:23,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:40:23,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:23,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:40:23,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:24,409 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:40:24,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:40:24,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:40:25,613 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 362 [2021-06-05 21:40:25,825 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 362 [2021-06-05 21:40:26,065 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 370 [2021-06-05 21:40:26,371 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 391 [2021-06-05 21:40:26,498 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 268 [2021-06-05 21:40:27,146 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 345 [2021-06-05 21:40:27,712 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 312 [2021-06-05 21:40:28,162 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 260 [2021-06-05 21:40:28,392 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-05 21:40:28,662 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-05 21:40:28,928 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 314 [2021-06-05 21:40:29,181 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 348 [2021-06-05 21:40:29,291 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 219 [2021-06-05 21:40:29,877 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 235 [2021-06-05 21:40:30,393 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 252 [2021-06-05 21:40:30,504 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 218 [2021-06-05 21:40:30,930 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 266 [2021-06-05 21:40:31,092 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 367 [2021-06-05 21:40:31,254 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 367 [2021-06-05 21:40:31,441 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 371 [2021-06-05 21:40:31,845 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 468 [2021-06-05 21:40:32,111 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 300 [2021-06-05 21:40:32,649 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 337 [2021-06-05 21:40:32,814 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 344 [2021-06-05 21:40:33,814 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 248 [2021-06-05 21:40:34,126 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 369 [2021-06-05 21:40:34,441 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 369 [2021-06-05 21:40:34,808 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 373 [2021-06-05 21:40:34,927 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 289 [2021-06-05 21:40:35,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:40:35,736 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 21:40:35,737 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 21:40:35,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 21:40:36,588 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 286 [2021-06-05 21:40:36,733 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 300 [2021-06-05 21:40:36,883 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 304 [2021-06-05 21:40:37,033 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 304 [2021-06-05 21:40:37,245 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 314 [2021-06-05 21:40:37,366 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 318 [2021-06-05 21:40:37,668 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 404 [2021-06-05 21:40:37,948 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 295 [2021-06-05 21:40:39,390 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 257 [2021-06-05 21:40:39,668 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 370 [2021-06-05 21:40:40,025 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 548 DAG size of output: 440 [2021-06-05 21:40:40,260 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 328 [2021-06-05 21:40:40,554 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 292 [2021-06-05 21:40:41,129 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 246 [2021-06-05 21:40:41,679 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 356 [2021-06-05 21:40:42,026 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 456 [2021-06-05 21:40:42,953 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 540 [2021-06-05 21:40:43,749 WARN L205 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 1074 DAG size of output: 737 [2021-06-05 21:40:44,593 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 1131 DAG size of output: 782 [2021-06-05 21:40:45,587 WARN L205 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 1150 DAG size of output: 798 [2021-06-05 21:40:46,569 WARN L205 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 1150 DAG size of output: 798 [2021-06-05 21:40:47,646 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1156 DAG size of output: 796 [2021-06-05 21:40:48,298 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 798 DAG size of output: 531 [2021-06-05 21:40:48,807 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 531 [2021-06-05 21:40:49,004 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 314 [2021-06-05 21:40:50,076 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 250 [2021-06-05 21:40:50,277 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 343 [2021-06-05 21:40:50,539 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 382 [2021-06-05 21:40:50,777 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 382 [2021-06-05 21:40:51,110 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 386 [2021-06-05 21:40:51,316 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 387 [2021-06-05 21:40:51,564 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 439 [2021-06-05 21:40:52,463 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 306 [2021-06-05 21:40:52,638 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 309 [2021-06-05 21:40:52,826 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 309 [2021-06-05 21:40:53,112 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 306 [2021-06-05 21:40:53,360 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 359 [2021-06-05 21:40:53,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:40:53,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:40:53,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:40:53,775 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:40:53,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:40:53,775 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 21:40:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:53,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062714700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:53,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:53,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 21:40:53,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508598790] [2021-06-05 21:40:53,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:40:53,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:53,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:40:53,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:40:53,807 INFO L87 Difference]: Start difference. First operand 3081 states and 9273 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:54,607 INFO L93 Difference]: Finished difference Result 3278 states and 9699 transitions. [2021-06-05 21:40:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:40:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:54,610 INFO L225 Difference]: With dead ends: 3278 [2021-06-05 21:40:54,611 INFO L226 Difference]: Without dead ends: 3252 [2021-06-05 21:40:54,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 595.8ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:40:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-06-05 21:40:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 3085. [2021-06-05 21:40:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.0103761348897535) internal successors, (9284), 3084 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 9284 transitions. [2021-06-05 21:40:54,642 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 9284 transitions. Word has length 22 [2021-06-05 21:40:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:54,642 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 9284 transitions. [2021-06-05 21:40:54,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:54,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 9284 transitions. [2021-06-05 21:40:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:54,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:54,645 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:54,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46810 [2021-06-05 21:40:54,845 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash 480874472, now seen corresponding path program 413 times [2021-06-05 21:40:54,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:54,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137397100] [2021-06-05 21:40:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:54,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:54,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137397100] [2021-06-05 21:40:54,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137397100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:54,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551722576] [2021-06-05 21:40:54,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:54,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:40:54,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:54,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:40:54,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:55,475 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:40:55,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:40:55,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:40:56,332 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 315 [2021-06-05 21:40:56,492 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 315 [2021-06-05 21:40:56,660 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 328 [2021-06-05 21:40:56,821 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 401 [2021-06-05 21:40:57,585 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 252 [2021-06-05 21:40:57,770 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-05 21:40:57,934 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-05 21:40:58,119 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 320 [2021-06-05 21:40:59,571 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 219 [2021-06-05 21:41:00,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:41:00,388 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 21:41:00,389 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 21:41:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 21:41:01,089 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 264 [2021-06-05 21:41:01,206 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 264 [2021-06-05 21:41:01,348 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 257 [2021-06-05 21:41:01,520 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 307 [2021-06-05 21:41:01,775 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 299 [2021-06-05 21:41:02,410 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 322 [2021-06-05 21:41:02,628 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 339 [2021-06-05 21:41:02,769 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 206 [2021-06-05 21:41:03,441 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 251 [2021-06-05 21:41:03,885 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 474 [2021-06-05 21:41:04,283 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 474 [2021-06-05 21:41:04,786 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 483 [2021-06-05 21:41:05,749 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 362 [2021-06-05 21:41:06,640 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 250 [2021-06-05 21:41:06,794 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 257 [2021-06-05 21:41:07,028 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 290 [2021-06-05 21:41:07,349 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 378 [2021-06-05 21:41:07,669 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 378 [2021-06-05 21:41:08,187 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 426 [2021-06-05 21:41:08,497 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 439 [2021-06-05 21:41:09,344 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 210 [2021-06-05 21:41:09,450 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 226 [2021-06-05 21:41:09,555 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 226 [2021-06-05 21:41:09,673 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 221 [2021-06-05 21:41:09,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:41:09,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:41:09,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:41:09,921 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:41:09,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:41:09,922 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 21:41:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:09,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551722576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:09,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:09,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 21:41:09,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419749631] [2021-06-05 21:41:09,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:41:09,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:09,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:41:09,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:41:09,951 INFO L87 Difference]: Start difference. First operand 3085 states and 9284 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:10,409 INFO L93 Difference]: Finished difference Result 3177 states and 9485 transitions. [2021-06-05 21:41:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:41:10,409 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:41:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:10,412 INFO L225 Difference]: With dead ends: 3177 [2021-06-05 21:41:10,412 INFO L226 Difference]: Without dead ends: 3167 [2021-06-05 21:41:10,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 542.9ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:41:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-06-05 21:41:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3091. [2021-06-05 21:41:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3090 states have (on average 3.010355987055016) internal successors, (9302), 3090 states have internal predecessors, (9302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 9302 transitions. [2021-06-05 21:41:10,442 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 9302 transitions. Word has length 22 [2021-06-05 21:41:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:10,442 INFO L482 AbstractCegarLoop]: Abstraction has 3091 states and 9302 transitions. [2021-06-05 21:41:10,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 9302 transitions. [2021-06-05 21:41:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:41:10,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:10,444 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:10,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48443,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:10,645 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:10,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:10,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1096538788, now seen corresponding path program 414 times [2021-06-05 21:41:10,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:10,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228927567] [2021-06-05 21:41:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:10,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:10,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228927567] [2021-06-05 21:41:10,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228927567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:10,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284394915] [2021-06-05 21:41:10,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:10,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:41:10,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:10,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:41:10,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:11,258 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:41:11,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:41:11,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:41:11,848 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 343 [2021-06-05 21:41:11,978 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 350 [2021-06-05 21:41:12,134 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 362 [2021-06-05 21:41:12,899 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 505 [2021-06-05 21:41:13,185 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 505 [2021-06-05 21:41:13,523 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 518 [2021-06-05 21:41:14,217 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 749 [2021-06-05 21:41:14,323 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 495 [2021-06-05 21:41:14,512 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 384 [2021-06-05 21:41:14,772 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 331 [2021-06-05 21:41:15,656 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 290 [2021-06-05 21:41:15,913 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 351 [2021-06-05 21:41:16,808 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 335 [2021-06-05 21:41:17,136 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 764 DAG size of output: 417 [2021-06-05 21:41:18,149 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 284 [2021-06-05 21:41:18,322 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 323 [2021-06-05 21:41:18,615 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 346 [2021-06-05 21:41:19,271 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 1065 DAG size of output: 648 [2021-06-05 21:41:20,191 WARN L205 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 729 [2021-06-05 21:41:21,111 WARN L205 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 729 [2021-06-05 21:41:22,096 WARN L205 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 1358 DAG size of output: 735 [2021-06-05 21:41:22,394 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 735 DAG size of output: 530 [2021-06-05 21:41:22,669 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 369 [2021-06-05 21:41:22,825 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 215 [2021-06-05 21:41:23,399 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 300 [2021-06-05 21:41:24,068 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 273 [2021-06-05 21:41:24,344 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 516 [2021-06-05 21:41:24,611 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 516 [2021-06-05 21:41:24,909 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 519 [2021-06-05 21:41:25,134 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 575 [2021-06-05 21:41:25,489 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 374 [2021-06-05 21:41:25,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:41:26,303 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 21:41:26,304 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 21:41:26,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 21:41:26,901 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 249 [2021-06-05 21:41:27,524 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 252 [2021-06-05 21:41:27,780 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 366 [2021-06-05 21:41:28,015 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 366 [2021-06-05 21:41:28,313 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 375 [2021-06-05 21:41:28,657 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 420 [2021-06-05 21:41:28,922 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 383 [2021-06-05 21:41:29,329 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 419 [2021-06-05 21:41:29,718 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 410 [2021-06-05 21:41:29,969 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 233 [2021-06-05 21:41:30,716 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 186 [2021-06-05 21:41:30,896 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 227 [2021-06-05 21:41:31,020 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 219 [2021-06-05 21:41:31,496 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 202 [2021-06-05 21:41:31,872 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 240 [2021-06-05 21:41:32,288 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 354 [2021-06-05 21:41:32,803 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 417 [2021-06-05 21:41:33,424 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 438 [2021-06-05 21:41:33,797 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 411 [2021-06-05 21:41:34,155 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 402 [2021-06-05 21:41:34,580 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 367 [2021-06-05 21:41:35,384 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 194 [2021-06-05 21:41:35,613 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 261 [2021-06-05 21:41:36,446 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 328 [2021-06-05 21:41:36,886 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 391 [2021-06-05 21:41:37,394 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 412 [2021-06-05 21:41:38,463 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 795 DAG size of output: 621 [2021-06-05 21:41:38,726 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 402 [2021-06-05 21:41:39,159 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 438 [2021-06-05 21:41:39,565 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 429 [2021-06-05 21:41:40,486 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 285 [2021-06-05 21:41:40,710 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 324 [2021-06-05 21:41:40,979 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 309 [2021-06-05 21:41:41,206 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 249 [2021-06-05 21:41:41,375 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 241 [2021-06-05 21:41:41,791 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 241 [2021-06-05 21:41:42,276 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 260 [2021-06-05 21:41:42,431 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 269 [2021-06-05 21:41:42,645 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 277 [2021-06-05 21:41:42,901 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 308 [2021-06-05 21:41:43,274 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 350 [2021-06-05 21:41:43,928 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 675 DAG size of output: 506 [2021-06-05 21:41:44,760 WARN L205 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 759 DAG size of output: 579 [2021-06-05 21:41:45,730 WARN L205 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 602 [2021-06-05 21:41:46,126 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 426 [2021-06-05 21:41:46,521 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 417 [2021-06-05 21:41:46,943 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 378 [2021-06-05 21:41:47,304 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 385 [2021-06-05 21:41:48,217 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 216 [2021-06-05 21:41:48,425 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 290 [2021-06-05 21:41:48,902 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 458 [2021-06-05 21:41:49,366 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 211 [2021-06-05 21:41:49,481 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 198 [2021-06-05 21:41:49,963 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 226 [2021-06-05 21:41:50,120 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 236 [2021-06-05 21:41:50,411 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 340 [2021-06-05 21:41:51,029 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 713 DAG size of output: 517 [2021-06-05 21:41:51,814 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 593 [2021-06-05 21:41:52,710 WARN L205 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 616 [2021-06-05 21:41:54,556 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 1211 DAG size of output: 855 [2021-06-05 21:41:57,853 WARN L205 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 1594 DAG size of output: 1219 [2021-06-05 21:42:01,142 WARN L205 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 1594 DAG size of output: 1219 [2021-06-05 21:42:04,962 WARN L205 SmtUtils]: Spent 3.81 s on a formula simplification. DAG size of input: 1603 DAG size of output: 1222 [2021-06-05 21:42:05,110 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 1217 [2021-06-05 21:42:06,514 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 1219 DAG size of output: 709 [2021-06-05 21:42:07,194 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 603 DAG size of output: 597 [2021-06-05 21:42:09,388 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 201 [2021-06-05 21:42:09,561 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 247 [2021-06-05 21:42:09,898 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 327 [2021-06-05 21:42:10,360 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 417 [2021-06-05 21:42:10,819 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 417 [2021-06-05 21:42:11,109 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 288 [2021-06-05 21:42:11,870 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 227 [2021-06-05 21:42:11,978 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 227 [2021-06-05 21:42:12,120 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 230 [2021-06-05 21:42:12,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:42:12,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:42:12,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:42:12,415 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 21:42:12,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:42:12,416 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 21:42:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:42:12,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284394915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:12,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:42:12,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 21:42:12,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919892286] [2021-06-05 21:42:12,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:42:12,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:42:12,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:42:12,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:42:12,446 INFO L87 Difference]: Start difference. First operand 3091 states and 9302 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:42:12,933 INFO L93 Difference]: Finished difference Result 3203 states and 9543 transitions. [2021-06-05 21:42:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:42:12,934 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:42:12,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:42:12,937 INFO L225 Difference]: With dead ends: 3203 [2021-06-05 21:42:12,937 INFO L226 Difference]: Without dead ends: 3193 [2021-06-05 21:42:12,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:42:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-06-05 21:42:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 3091. [2021-06-05 21:42:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3090 states have (on average 3.010355987055016) internal successors, (9302), 3090 states have internal predecessors, (9302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 9302 transitions. [2021-06-05 21:42:12,967 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 9302 transitions. Word has length 22 [2021-06-05 21:42:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:42:12,967 INFO L482 AbstractCegarLoop]: Abstraction has 3091 states and 9302 transitions. [2021-06-05 21:42:12,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:42:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 9302 transitions. [2021-06-05 21:42:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:42:12,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:42:12,969 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:42:13,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49540,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:13,170 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:42:13,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:42:13,171 INFO L82 PathProgramCache]: Analyzing trace with hash -227504460, now seen corresponding path program 415 times [2021-06-05 21:42:13,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:42:13,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235272182] [2021-06-05 21:42:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:42:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:42:13,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:42:13,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235272182] [2021-06-05 21:42:13,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235272182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:42:13,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495883643] [2021-06-05 21:42:13,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:42:13,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:42:13,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:42:13,750 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:42:13,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:42:13,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:42:14,628 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 261 [2021-06-05 21:42:14,754 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 261 [2021-06-05 21:42:14,896 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 270 [2021-06-05 21:42:15,058 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 306 [2021-06-05 21:42:15,741 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 283 [2021-06-05 21:42:16,186 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 280 [2021-06-05 21:42:16,454 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 442 [2021-06-05 21:42:16,727 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 442 [2021-06-05 21:42:17,055 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 451 [2021-06-05 21:42:17,449 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 406 [2021-06-05 21:42:17,664 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 339 [2021-06-05 21:42:17,789 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 267 Received shutdown request... [2021-06-05 21:42:18,491 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 289 [2021-06-05 21:42:18,705 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 321 [2021-06-05 21:42:18,916 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 321 [2021-06-05 21:42:19,172 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 328 [2021-06-05 21:42:19,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51755,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:42:19,374 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 21:42:19,376 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:42:19,378 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 21:42:19,378 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:42:19 BasicIcfg [2021-06-05 21:42:19,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:42:19,378 INFO L168 Benchmark]: Toolchain (without parser) took 870060.95 ms. Allocated memory was 371.2 MB in the beginning and 3.0 GB in the end (delta: 2.6 GB). Free memory was 350.7 MB in the beginning and 2.7 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. [2021-06-05 21:42:19,378 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 371.2 MB. Free memory is still 351.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:42:19,378 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.24 ms. Allocated memory is still 371.2 MB. Free memory was 350.6 MB in the beginning and 349.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:42:19,379 INFO L168 Benchmark]: Boogie Preprocessor took 21.79 ms. Allocated memory is still 371.2 MB. Free memory was 349.1 MB in the beginning and 348.2 MB in the end (delta: 911.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:42:19,379 INFO L168 Benchmark]: RCFGBuilder took 445.23 ms. Allocated memory is still 371.2 MB. Free memory was 348.0 MB in the beginning and 331.0 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 21:42:19,379 INFO L168 Benchmark]: TraceAbstraction took 869560.19 ms. Allocated memory was 371.2 MB in the beginning and 3.0 GB in the end (delta: 2.6 GB). Free memory was 330.5 MB in the beginning and 2.7 GB in the end (delta: -2.4 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. [2021-06-05 21:42:19,379 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 371.2 MB. Free memory is still 351.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.24 ms. Allocated memory is still 371.2 MB. Free memory was 350.6 MB in the beginning and 349.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.79 ms. Allocated memory is still 371.2 MB. Free memory was 349.1 MB in the beginning and 348.2 MB in the end (delta: 911.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 445.23 ms. Allocated memory is still 371.2 MB. Free memory was 348.0 MB in the beginning and 331.0 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 869560.19 ms. Allocated memory was 371.2 MB in the beginning and 3.0 GB in the end (delta: 2.6 GB). Free memory was 330.5 MB in the beginning and 2.7 GB in the end (delta: -2.4 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 869450.7ms, OverallIterations: 427, TraceHistogramMax: 9, EmptinessCheckTime: 519.2ms, AutomataDifference: 123882.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8883 SDtfs, 22805 SDslu, 67460 SDs, 0 SdLazy, 132349 SolverSat, 15743 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53076.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16061 GetRequests, 5925 SyntacticMatches, 182 SemanticMatches, 9954 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64084 ImplicationChecksByTransitivity, 112387.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3997occurred in iteration=279, InterpolantAutomatonStates: 8492, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6824.3ms AutomataMinimizationTime, 426 MinimizatonAttempts, 89903 StatesRemovedByMinimization, 423 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1230.3ms SsaConstructionTime, 4380.4ms SatisfiabilityAnalysisTime, 632375.6ms InterpolantComputationTime, 15754 NumberOfCodeBlocks, 15754 NumberOfCodeBlocksAsserted, 1694 NumberOfCheckSat, 14906 ConstructedInterpolants, 9 QuantifiedInterpolants, 143833 SizeOfPredicates, 572 NumberOfNonLiveVariables, 31257 ConjunctsInSsa, 10071 ConjunctsInUnsatCore, 848 InterpolantComputations, 4 PerfectInterpolantSequences, 5297/25141 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown