/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/popl20-more/array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:39:51,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:39:51,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:39:51,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:39:51,840 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 23:39:51,874 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:39:51,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:39:51,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:39:51,875 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:39:51,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:39:51,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:39:51,878 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:39:51,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:39:51,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:39:51,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:39:51,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:39:51,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:39:51,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:39:51,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:39:51,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:39:51,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:39:51,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:39:51,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:39:51,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:39:51,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:39:51,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:39:51,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:39:51,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:39:51,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:39:51,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:39:51,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:39:51,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:39:51,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:39:51,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:39:51,882 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:39:51,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:39:51,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:39:52,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:39:52,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:39:52,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:39:52,220 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:39:52,223 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:39:52,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl [2021-06-05 23:39:52,224 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl' [2021-06-05 23:39:52,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:39:52,257 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:39:52,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:39:52,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:39:52,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:39:52,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (1/1) ... [2021-06-05 23:39:52,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (1/1) ... [2021-06-05 23:39:52,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:39:52,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:39:52,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:39:52,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:39:52,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (1/1) ... [2021-06-05 23:39:52,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (1/1) ... [2021-06-05 23:39:52,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (1/1) ... [2021-06-05 23:39:52,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (1/1) ... [2021-06-05 23:39:52,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (1/1) ... [2021-06-05 23:39:52,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (1/1) ... [2021-06-05 23:39:52,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (1/1) ... [2021-06-05 23:39:52,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:39:52,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:39:52,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:39:52,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:39:52,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (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 23:39:52,371 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:39:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:39:52,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:39:52,371 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:39:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:39:52,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:39:52,372 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:39:52,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:39:52,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:39:52,372 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:39:52,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:39:52,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:39:52,373 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 23:39:52,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:39:52,568 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:39:52,569 INFO L202 PluginConnector]: Adding new model array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:39:52 BoogieIcfgContainer [2021-06-05 23:39:52,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:39:52,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:39:52,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:39:52,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:39:52,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:39:52" (1/2) ... [2021-06-05 23:39:52,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cee56e2 and model type array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:39:52, skipping insertion in model container [2021-06-05 23:39:52,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:39:52" (2/2) ... [2021-06-05 23:39:52,575 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum.wvr.bpl [2021-06-05 23:39:52,585 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:39:52,587 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:39:52,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:39:52,589 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:39:52,671 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:39:52,704 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:39:52,736 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:39:52,736 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:39:52,737 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:39:52,737 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:39:52,737 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:39:52,737 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:39:52,737 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:39:52,737 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:39:52,776 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-06-05 23:39:52,831 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:52,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:39:52,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:52,853 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:52,853 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:52,858 INFO L82 PathProgramCache]: Analyzing trace with hash -657586350, now seen corresponding path program 1 times [2021-06-05 23:39:52,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:52,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419964754] [2021-06-05 23:39:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:53,019 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 23:39:53,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:53,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419964754] [2021-06-05 23:39:53,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419964754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:39:53,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:39:53,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:39:53,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374385336] [2021-06-05 23:39:53,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:39:53,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:53,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:39:53,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:39:53,036 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 23:39:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:53,077 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-06-05 23:39:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:39:53,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 18 [2021-06-05 23:39:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:53,093 INFO L225 Difference]: With dead ends: 298 [2021-06-05 23:39:53,093 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 23:39:53,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:39:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 23:39:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-05 23:39:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-06-05 23:39:53,147 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-06-05 23:39:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:53,148 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-06-05 23:39:53,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 23:39:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-06-05 23:39:53,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:39:53,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:53,151 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:53,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:39:53,152 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:53,152 INFO L82 PathProgramCache]: Analyzing trace with hash 462847107, now seen corresponding path program 1 times [2021-06-05 23:39:53,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:53,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717831863] [2021-06-05 23:39:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:39:53,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:53,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717831863] [2021-06-05 23:39:53,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717831863] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:39:53,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:39:53,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:39:53,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267491651] [2021-06-05 23:39:53,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:39:53,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:53,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:39:53,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:39:53,197 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 23:39:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:53,262 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2021-06-05 23:39:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:39:53,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 21 [2021-06-05 23:39:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:53,270 INFO L225 Difference]: With dead ends: 249 [2021-06-05 23:39:53,270 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 23:39:53,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:39:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 23:39:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-06-05 23:39:53,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:53,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2021-06-05 23:39:53,303 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2021-06-05 23:39:53,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:53,303 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2021-06-05 23:39:53,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 23:39:53,303 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2021-06-05 23:39:53,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:39:53,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:53,306 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:53,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:39:53,306 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:53,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:53,307 INFO L82 PathProgramCache]: Analyzing trace with hash 636065525, now seen corresponding path program 1 times [2021-06-05 23:39:53,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:53,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185561840] [2021-06-05 23:39:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:39:53,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:53,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185561840] [2021-06-05 23:39:53,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185561840] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:39:53,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:39:53,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:39:53,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125448014] [2021-06-05 23:39:53,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:39:53,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:53,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:39:53,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:39:53,357 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 23:39:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:53,406 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2021-06-05 23:39:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:39:53,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21 [2021-06-05 23:39:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:53,412 INFO L225 Difference]: With dead ends: 332 [2021-06-05 23:39:53,415 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 23:39:53,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:39:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 23:39:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2021-06-05 23:39:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2021-06-05 23:39:53,445 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2021-06-05 23:39:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:53,446 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2021-06-05 23:39:53,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 23:39:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2021-06-05 23:39:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:39:53,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:53,453 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:53,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:39:53,453 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:53,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:53,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1016641500, now seen corresponding path program 1 times [2021-06-05 23:39:53,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:53,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383533801] [2021-06-05 23:39:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:53,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:53,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383533801] [2021-06-05 23:39:53,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383533801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:53,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689348252] [2021-06-05 23:39:53,926 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 23:39:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:53,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:39:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:54,279 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 28 treesize of output 22 [2021-06-05 23:39:54,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:54,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:54,288 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 23:39:54,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:54,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:7 [2021-06-05 23:39:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:54,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689348252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:54,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:54,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 23:39:54,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994498452] [2021-06-05 23:39:54,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:39:54,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:39:54,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:39:54,320 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 23:39:54,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:54,628 INFO L93 Difference]: Finished difference Result 426 states and 1215 transitions. [2021-06-05 23:39:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:39:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 24 [2021-06-05 23:39:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:54,632 INFO L225 Difference]: With dead ends: 426 [2021-06-05 23:39:54,633 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 23:39:54,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 501.6ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:39:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 23:39:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 346. [2021-06-05 23:39:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2021-06-05 23:39:54,658 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2021-06-05 23:39:54,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:54,658 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2021-06-05 23:39:54,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 23:39:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2021-06-05 23:39:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:39:54,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:54,660 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:54,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:54,880 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:54,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1315865850, now seen corresponding path program 2 times [2021-06-05 23:39:54,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:54,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409451555] [2021-06-05 23:39:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:55,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:55,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409451555] [2021-06-05 23:39:55,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409451555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:55,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016664444] [2021-06-05 23:39:55,261 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 23:39:55,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:39:55,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:55,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:39:55,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:55,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:55,521 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-06-05 23:39:55,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:39:55,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:55,548 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:39:55,555 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:39:55,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:55,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:55,584 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:19 [2021-06-05 23:39:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:55,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016664444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:55,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:55,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 23:39:55,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454086847] [2021-06-05 23:39:55,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:39:55,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:55,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:39:55,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:39:55,660 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:56,476 INFO L93 Difference]: Finished difference Result 608 states and 1727 transitions. [2021-06-05 23:39:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:39:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:39:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:56,480 INFO L225 Difference]: With dead ends: 608 [2021-06-05 23:39:56,480 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 23:39:56,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 852.6ms TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:39:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 23:39:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 362. [2021-06-05 23:39:56,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9224376731301938) internal successors, (1055), 361 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:56,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1055 transitions. [2021-06-05 23:39:56,493 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1055 transitions. Word has length 24 [2021-06-05 23:39:56,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:56,493 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1055 transitions. [2021-06-05 23:39:56,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1055 transitions. [2021-06-05 23:39:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:39:56,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:56,495 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:56,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:56,717 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:56,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:56,717 INFO L82 PathProgramCache]: Analyzing trace with hash 881318070, now seen corresponding path program 3 times [2021-06-05 23:39:56,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:56,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690209273] [2021-06-05 23:39:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:57,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:57,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690209273] [2021-06-05 23:39:57,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690209273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:57,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037673428] [2021-06-05 23:39:57,024 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 23:39:57,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:39:57,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:57,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:39:57,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:57,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:57,152 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-06-05 23:39:57,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:39:57,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:57,173 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:39:57,176 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:39:57,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:57,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:57,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:15 [2021-06-05 23:39:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:57,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037673428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:57,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:57,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-06-05 23:39:57,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461835885] [2021-06-05 23:39:57,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:39:57,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:57,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:39:57,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:39:57,281 INFO L87 Difference]: Start difference. First operand 362 states and 1055 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 23:39:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:57,934 INFO L93 Difference]: Finished difference Result 695 states and 2018 transitions. [2021-06-05 23:39:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:39:57,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 24 [2021-06-05 23:39:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:57,938 INFO L225 Difference]: With dead ends: 695 [2021-06-05 23:39:57,938 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 23:39:57,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 646.7ms TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:39:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 23:39:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 366. [2021-06-05 23:39:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9342465753424656) internal successors, (1071), 365 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1071 transitions. [2021-06-05 23:39:57,951 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1071 transitions. Word has length 24 [2021-06-05 23:39:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:57,951 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1071 transitions. [2021-06-05 23:39:57,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 23:39:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1071 transitions. [2021-06-05 23:39:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:39:57,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:57,953 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:58,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:58,169 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash 760908006, now seen corresponding path program 4 times [2021-06-05 23:39:58,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:58,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996157952] [2021-06-05 23:39:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:58,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:58,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996157952] [2021-06-05 23:39:58,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996157952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:58,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946989671] [2021-06-05 23:39:58,390 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 23:39:58,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:39:58,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:58,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:39:58,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:58,538 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 19 treesize of output 15 [2021-06-05 23:39:58,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:58,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:58,545 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 23:39:58,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:58,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2021-06-05 23:39:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:58,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946989671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:58,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:58,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 23:39:58,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898632303] [2021-06-05 23:39:58,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:39:58,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:58,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:39:58,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:39:58,576 INFO L87 Difference]: Start difference. First operand 366 states and 1071 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23:39:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:58,814 INFO L93 Difference]: Finished difference Result 558 states and 1607 transitions. [2021-06-05 23:39:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:39:58,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 24 [2021-06-05 23:39:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:58,819 INFO L225 Difference]: With dead ends: 558 [2021-06-05 23:39:58,819 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 23:39:58,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:39:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 23:39:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 382. [2021-06-05 23:39:58,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.916010498687664) internal successors, (1111), 381 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:58,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1111 transitions. [2021-06-05 23:39:58,830 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1111 transitions. Word has length 24 [2021-06-05 23:39:58,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:58,830 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1111 transitions. [2021-06-05 23:39:58,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23:39:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1111 transitions. [2021-06-05 23:39:58,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:39:58,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:58,833 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:59,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:59,053 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:59,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1735055962, now seen corresponding path program 5 times [2021-06-05 23:39:59,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:59,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008381134] [2021-06-05 23:39:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:59,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:59,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008381134] [2021-06-05 23:39:59,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008381134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:59,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63660164] [2021-06-05 23:39:59,285 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 23:39:59,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:39:59,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:59,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:39:59,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:59,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:59,472 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 23:39:59,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:39:59,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:59,485 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:39:59,487 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:39:59,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:59,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:59,511 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:28 [2021-06-05 23:39:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:59,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63660164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:59,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:59,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 23:39:59,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459110819] [2021-06-05 23:39:59,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:39:59,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:59,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:39:59,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:39:59,596 INFO L87 Difference]: Start difference. First operand 382 states and 1111 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:59,978 INFO L93 Difference]: Finished difference Result 681 states and 1985 transitions. [2021-06-05 23:39:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:39:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:39:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:59,982 INFO L225 Difference]: With dead ends: 681 [2021-06-05 23:39:59,982 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 23:39:59,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:39:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 23:39:59,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 390. [2021-06-05 23:39:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.9383033419023135) internal successors, (1143), 389 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1143 transitions. [2021-06-05 23:39:59,995 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1143 transitions. Word has length 24 [2021-06-05 23:39:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:59,995 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1143 transitions. [2021-06-05 23:39:59,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1143 transitions. [2021-06-05 23:39:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:39:59,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:59,997 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:00,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 23:40:00,219 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:00,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1894651415, now seen corresponding path program 6 times [2021-06-05 23:40:00,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:00,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954490586] [2021-06-05 23:40:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:00,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:00,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954490586] [2021-06-05 23:40:00,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954490586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:00,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211830847] [2021-06-05 23:40:00,267 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 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 23:40:00,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:40:00,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:00,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:00,390 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 23:40:00,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211830847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:00,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:00,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:40:00,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382008075] [2021-06-05 23:40:00,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:40:00,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:00,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:40:00,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:40:00,392 INFO L87 Difference]: Start difference. First operand 390 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:00,835 INFO L93 Difference]: Finished difference Result 1186 states and 3456 transitions. [2021-06-05 23:40:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:40:00,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:00,841 INFO L225 Difference]: With dead ends: 1186 [2021-06-05 23:40:00,841 INFO L226 Difference]: Without dead ends: 1186 [2021-06-05 23:40:00,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:40:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-05 23:40:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 509. [2021-06-05 23:40:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.0688976377952755) internal successors, (1559), 508 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1559 transitions. [2021-06-05 23:40:00,859 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1559 transitions. Word has length 27 [2021-06-05 23:40:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:00,859 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1559 transitions. [2021-06-05 23:40:00,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1559 transitions. [2021-06-05 23:40:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:00,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:00,860 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:01,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:01,083 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:01,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1911795193, now seen corresponding path program 7 times [2021-06-05 23:40:01,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:01,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37818569] [2021-06-05 23:40:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:01,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:01,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37818569] [2021-06-05 23:40:01,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37818569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:01,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106309748] [2021-06-05 23:40:01,139 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 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 23:40:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:01,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:01,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:01,299 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 23:40:01,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106309748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:01,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:01,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:01,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373062370] [2021-06-05 23:40:01,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:01,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:01,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:01,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:01,303 INFO L87 Difference]: Start difference. First operand 509 states and 1559 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:02,214 INFO L93 Difference]: Finished difference Result 2025 states and 5753 transitions. [2021-06-05 23:40:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:40:02,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:02,225 INFO L225 Difference]: With dead ends: 2025 [2021-06-05 23:40:02,225 INFO L226 Difference]: Without dead ends: 2025 [2021-06-05 23:40:02,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:40:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-06-05 23:40:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 515. [2021-06-05 23:40:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.0914396887159534) internal successors, (1589), 514 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1589 transitions. [2021-06-05 23:40:02,250 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1589 transitions. Word has length 27 [2021-06-05 23:40:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:02,250 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1589 transitions. [2021-06-05 23:40:02,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1589 transitions. [2021-06-05 23:40:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:02,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:02,261 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:02,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:40:02,477 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:02,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:02,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2105695861, now seen corresponding path program 8 times [2021-06-05 23:40:02,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:02,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069347041] [2021-06-05 23:40:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:02,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069347041] [2021-06-05 23:40:02,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069347041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523413094] [2021-06-05 23:40:02,532 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 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 23:40:02,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:02,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:02,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:02,656 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 23:40:02,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523413094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:02,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:02,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:02,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593718615] [2021-06-05 23:40:02,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:02,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:02,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:02,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:02,658 INFO L87 Difference]: Start difference. First operand 515 states and 1589 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:03,411 INFO L93 Difference]: Finished difference Result 1842 states and 5297 transitions. [2021-06-05 23:40:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:40:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:03,420 INFO L225 Difference]: With dead ends: 1842 [2021-06-05 23:40:03,420 INFO L226 Difference]: Without dead ends: 1842 [2021-06-05 23:40:03,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 413.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:40:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-06-05 23:40:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 505. [2021-06-05 23:40:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.0734126984126986) internal successors, (1549), 504 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1549 transitions. [2021-06-05 23:40:03,441 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1549 transitions. Word has length 27 [2021-06-05 23:40:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:03,441 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1549 transitions. [2021-06-05 23:40:03,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1549 transitions. [2021-06-05 23:40:03,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:03,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:03,443 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:03,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 23:40:03,666 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:03,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:03,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1867674968, now seen corresponding path program 1 times [2021-06-05 23:40:03,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:03,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649892430] [2021-06-05 23:40:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:03,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:03,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649892430] [2021-06-05 23:40:03,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649892430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:03,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61976063] [2021-06-05 23:40:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:40:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:03,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:40:03,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:03,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61976063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:03,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:03,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:40:03,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639645741] [2021-06-05 23:40:03,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:40:03,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:03,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:40:03,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:40:03,805 INFO L87 Difference]: Start difference. First operand 505 states and 1549 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 23:40:03,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:03,952 INFO L93 Difference]: Finished difference Result 1215 states and 3591 transitions. [2021-06-05 23:40:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:40:03,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 27 [2021-06-05 23:40:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:03,958 INFO L225 Difference]: With dead ends: 1215 [2021-06-05 23:40:03,958 INFO L226 Difference]: Without dead ends: 1209 [2021-06-05 23:40:03,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-06-05 23:40:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 784. [2021-06-05 23:40:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.177522349936143) internal successors, (2488), 783 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2488 transitions. [2021-06-05 23:40:03,997 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2488 transitions. Word has length 27 [2021-06-05 23:40:03,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:03,997 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2488 transitions. [2021-06-05 23:40:03,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 23:40:03,998 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2488 transitions. [2021-06-05 23:40:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:04,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:04,000 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:04,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 23:40:04,217 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1507341085, now seen corresponding path program 9 times [2021-06-05 23:40:04,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:04,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856903984] [2021-06-05 23:40:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:04,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:04,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856903984] [2021-06-05 23:40:04,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856903984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:04,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916826848] [2021-06-05 23:40:04,273 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 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 23:40:04,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:40:04,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:04,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:04,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:04,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916826848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:04,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:04,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:40:04,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800385554] [2021-06-05 23:40:04,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:04,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:04,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:04,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:04,422 INFO L87 Difference]: Start difference. First operand 784 states and 2488 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:04,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:04,622 INFO L93 Difference]: Finished difference Result 1375 states and 4197 transitions. [2021-06-05 23:40:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:40:04,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:04,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:04,628 INFO L225 Difference]: With dead ends: 1375 [2021-06-05 23:40:04,629 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 23:40:04,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:40:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 23:40:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 987. [2021-06-05 23:40:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.186612576064909) internal successors, (3142), 986 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:04,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3142 transitions. [2021-06-05 23:40:04,653 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3142 transitions. Word has length 27 [2021-06-05 23:40:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:04,653 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 3142 transitions. [2021-06-05 23:40:04,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:04,654 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3142 transitions. [2021-06-05 23:40:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:04,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:04,656 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:04,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 23:40:04,873 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:04,873 INFO L82 PathProgramCache]: Analyzing trace with hash 904899992, now seen corresponding path program 2 times [2021-06-05 23:40:04,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:04,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630781290] [2021-06-05 23:40:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:04,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:04,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630781290] [2021-06-05 23:40:04,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630781290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:04,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564412206] [2021-06-05 23:40:04,908 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 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 23:40:04,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:04,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:04,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:40:04,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:05,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564412206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:05,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:05,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:40:05,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226849387] [2021-06-05 23:40:05,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:40:05,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:05,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:40:05,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:40:05,050 INFO L87 Difference]: Start difference. First operand 987 states and 3142 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 23:40:05,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:05,190 INFO L93 Difference]: Finished difference Result 1478 states and 4418 transitions. [2021-06-05 23:40:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:40:05,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 27 [2021-06-05 23:40:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:05,196 INFO L225 Difference]: With dead ends: 1478 [2021-06-05 23:40:05,197 INFO L226 Difference]: Without dead ends: 1478 [2021-06-05 23:40:05,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-06-05 23:40:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2021-06-05 23:40:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.1502487562189057) internal successors, (3166), 1005 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3166 transitions. [2021-06-05 23:40:05,223 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3166 transitions. Word has length 27 [2021-06-05 23:40:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:05,223 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3166 transitions. [2021-06-05 23:40:05,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 23:40:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3166 transitions. [2021-06-05 23:40:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:05,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:05,226 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:05,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:05,448 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:05,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1067209209, now seen corresponding path program 10 times [2021-06-05 23:40:05,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:05,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44639592] [2021-06-05 23:40:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:05,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:05,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44639592] [2021-06-05 23:40:05,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44639592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:05,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95206602] [2021-06-05 23:40:05,490 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 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 23:40:05,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:05,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:05,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:05,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:05,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95206602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:05,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:05,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:40:05,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745407374] [2021-06-05 23:40:05,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:40:05,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:05,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:40:05,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:40:05,598 INFO L87 Difference]: Start difference. First operand 1006 states and 3166 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 23:40:05,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:05,937 INFO L93 Difference]: Finished difference Result 2277 states and 6674 transitions. [2021-06-05 23:40:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:40:05,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-06-05 23:40:05,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:05,950 INFO L225 Difference]: With dead ends: 2277 [2021-06-05 23:40:05,950 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 23:40:05,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:40:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 23:40:05,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1022. [2021-06-05 23:40:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.147894221351616) internal successors, (3214), 1021 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3214 transitions. [2021-06-05 23:40:05,987 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3214 transitions. Word has length 27 [2021-06-05 23:40:05,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:05,988 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3214 transitions. [2021-06-05 23:40:05,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 23:40:05,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3214 transitions. [2021-06-05 23:40:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:05,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:05,991 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:06,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:06,213 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:06,213 INFO L82 PathProgramCache]: Analyzing trace with hash 979484837, now seen corresponding path program 11 times [2021-06-05 23:40:06,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:06,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060037165] [2021-06-05 23:40:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:06,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:06,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060037165] [2021-06-05 23:40:06,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060037165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:06,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399848917] [2021-06-05 23:40:06,254 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 23:40:06,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:40:06,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:06,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399848917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:06,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:06,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:40:06,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638085208] [2021-06-05 23:40:06,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:40:06,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:06,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:40:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:40:06,348 INFO L87 Difference]: Start difference. First operand 1022 states and 3214 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 23:40:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:06,808 INFO L93 Difference]: Finished difference Result 2725 states and 7832 transitions. [2021-06-05 23:40:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:40:06,808 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-06-05 23:40:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:06,819 INFO L225 Difference]: With dead ends: 2725 [2021-06-05 23:40:06,820 INFO L226 Difference]: Without dead ends: 2725 [2021-06-05 23:40:06,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:40:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-06-05 23:40:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1096. [2021-06-05 23:40:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.1406392694063925) internal successors, (3439), 1095 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3439 transitions. [2021-06-05 23:40:06,853 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3439 transitions. Word has length 27 [2021-06-05 23:40:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:06,853 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3439 transitions. [2021-06-05 23:40:06,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 23:40:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3439 transitions. [2021-06-05 23:40:06,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:06,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:06,856 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:07,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 23:40:07,073 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash 652154561, now seen corresponding path program 12 times [2021-06-05 23:40:07,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:07,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218876381] [2021-06-05 23:40:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:07,113 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 23:40:07,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:07,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218876381] [2021-06-05 23:40:07,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218876381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:07,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447149052] [2021-06-05 23:40:07,113 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 23:40:07,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 23:40:07,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:07,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:07,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:07,239 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 23:40:07,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447149052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:07,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:07,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:40:07,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342521366] [2021-06-05 23:40:07,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:07,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:07,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:07,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:07,240 INFO L87 Difference]: Start difference. First operand 1096 states and 3439 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:07,516 INFO L93 Difference]: Finished difference Result 2457 states and 7416 transitions. [2021-06-05 23:40:07,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:40:07,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:07,522 INFO L225 Difference]: With dead ends: 2457 [2021-06-05 23:40:07,522 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 23:40:07,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:40:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 23:40:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1570. [2021-06-05 23:40:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.1963033779477374) internal successors, (5015), 1569 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5015 transitions. [2021-06-05 23:40:07,569 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5015 transitions. Word has length 27 [2021-06-05 23:40:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:07,570 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5015 transitions. [2021-06-05 23:40:07,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5015 transitions. [2021-06-05 23:40:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:07,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:07,574 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:07,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:07,789 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1601452251, now seen corresponding path program 13 times [2021-06-05 23:40:07,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:07,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564539153] [2021-06-05 23:40:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:07,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:07,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564539153] [2021-06-05 23:40:07,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564539153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:07,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275476749] [2021-06-05 23:40:07,838 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 23:40:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:07,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:07,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275476749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:07,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:07,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:40:07,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227065873] [2021-06-05 23:40:07,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:07,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:07,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:07,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:07,972 INFO L87 Difference]: Start difference. First operand 1570 states and 5015 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:08,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:08,315 INFO L93 Difference]: Finished difference Result 2556 states and 7763 transitions. [2021-06-05 23:40:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:40:08,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:08,321 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 23:40:08,321 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 23:40:08,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:40:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 23:40:08,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1576. [2021-06-05 23:40:08,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.1885714285714286) internal successors, (5022), 1575 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5022 transitions. [2021-06-05 23:40:08,357 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5022 transitions. Word has length 27 [2021-06-05 23:40:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:08,358 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5022 transitions. [2021-06-05 23:40:08,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5022 transitions. [2021-06-05 23:40:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:08,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:08,362 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:08,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:40:08,577 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:08,577 INFO L82 PathProgramCache]: Analyzing trace with hash -570446103, now seen corresponding path program 14 times [2021-06-05 23:40:08,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:08,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102695311] [2021-06-05 23:40:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:08,625 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 23:40:08,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:08,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102695311] [2021-06-05 23:40:08,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102695311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:08,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937153604] [2021-06-05 23:40:08,625 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 23:40:08,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:08,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:08,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:08,731 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 23:40:08,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937153604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:08,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:08,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:40:08,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107338934] [2021-06-05 23:40:08,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:40:08,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:08,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:40:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:40:08,733 INFO L87 Difference]: Start difference. First operand 1576 states and 5022 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 23:40:09,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:09,163 INFO L93 Difference]: Finished difference Result 3074 states and 9276 transitions. [2021-06-05 23:40:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:40:09,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-06-05 23:40:09,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:09,170 INFO L225 Difference]: With dead ends: 3074 [2021-06-05 23:40:09,170 INFO L226 Difference]: Without dead ends: 3070 [2021-06-05 23:40:09,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:40:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-06-05 23:40:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1588. [2021-06-05 23:40:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.178323881537492) internal successors, (5044), 1587 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5044 transitions. [2021-06-05 23:40:09,225 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5044 transitions. Word has length 27 [2021-06-05 23:40:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:09,225 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 5044 transitions. [2021-06-05 23:40:09,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 23:40:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5044 transitions. [2021-06-05 23:40:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:09,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:09,228 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:09,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:09,441 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:09,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1494759849, now seen corresponding path program 15 times [2021-06-05 23:40:09,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:09,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650318093] [2021-06-05 23:40:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:09,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:09,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650318093] [2021-06-05 23:40:09,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650318093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:09,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794482162] [2021-06-05 23:40:09,487 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 23:40:09,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:40:09,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:09,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:09,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794482162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:09,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:09,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:09,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428171361] [2021-06-05 23:40:09,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:09,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:09,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:09,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:09,601 INFO L87 Difference]: Start difference. First operand 1588 states and 5044 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:10,386 INFO L93 Difference]: Finished difference Result 5541 states and 16712 transitions. [2021-06-05 23:40:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:40:10,386 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:10,399 INFO L225 Difference]: With dead ends: 5541 [2021-06-05 23:40:10,399 INFO L226 Difference]: Without dead ends: 5541 [2021-06-05 23:40:10,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:40:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2021-06-05 23:40:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 1799. [2021-06-05 23:40:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 3.274193548387097) internal successors, (5887), 1798 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 5887 transitions. [2021-06-05 23:40:10,470 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 5887 transitions. Word has length 27 [2021-06-05 23:40:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:10,470 INFO L482 AbstractCegarLoop]: Abstraction has 1799 states and 5887 transitions. [2021-06-05 23:40:10,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 5887 transitions. [2021-06-05 23:40:10,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:10,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:10,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:10,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 23:40:10,697 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:10,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1300859181, now seen corresponding path program 16 times [2021-06-05 23:40:10,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:10,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358068478] [2021-06-05 23:40:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:10,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:10,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358068478] [2021-06-05 23:40:10,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358068478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:10,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134250908] [2021-06-05 23:40:10,756 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 23:40:10,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:10,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:10,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:10,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:10,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134250908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:10,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:10,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:10,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976659257] [2021-06-05 23:40:10,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:10,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:10,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:10,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:10,887 INFO L87 Difference]: Start difference. First operand 1799 states and 5887 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:11,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:11,653 INFO L93 Difference]: Finished difference Result 5525 states and 16688 transitions. [2021-06-05 23:40:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:40:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:11,663 INFO L225 Difference]: With dead ends: 5525 [2021-06-05 23:40:11,664 INFO L226 Difference]: Without dead ends: 5525 [2021-06-05 23:40:11,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 431.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:40:11,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-06-05 23:40:11,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 1784. [2021-06-05 23:40:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.259113853056646) internal successors, (5811), 1783 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5811 transitions. [2021-06-05 23:40:11,730 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5811 transitions. Word has length 27 [2021-06-05 23:40:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:11,730 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 5811 transitions. [2021-06-05 23:40:11,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5811 transitions. [2021-06-05 23:40:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:11,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:11,734 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:11,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 23:40:11,957 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash 928949415, now seen corresponding path program 17 times [2021-06-05 23:40:11,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:11,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363815862] [2021-06-05 23:40:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:11,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:11,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363815862] [2021-06-05 23:40:11,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363815862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:11,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212003040] [2021-06-05 23:40:11,998 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 23:40:12,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:40:12,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:12,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:12,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212003040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:12,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:12,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:40:12,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534603026] [2021-06-05 23:40:12,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:40:12,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:40:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:40:12,113 INFO L87 Difference]: Start difference. First operand 1784 states and 5811 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:12,887 INFO L93 Difference]: Finished difference Result 5112 states and 15104 transitions. [2021-06-05 23:40:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:40:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:12,903 INFO L225 Difference]: With dead ends: 5112 [2021-06-05 23:40:12,903 INFO L226 Difference]: Without dead ends: 5112 [2021-06-05 23:40:12,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 414.0ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:40:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-06-05 23:40:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 1804. [2021-06-05 23:40:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.265113699389906) internal successors, (5887), 1803 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5887 transitions. [2021-06-05 23:40:12,969 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5887 transitions. Word has length 27 [2021-06-05 23:40:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:12,969 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5887 transitions. [2021-06-05 23:40:12,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5887 transitions. [2021-06-05 23:40:12,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:12,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:12,973 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:13,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:40:13,189 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash 739731117, now seen corresponding path program 18 times [2021-06-05 23:40:13,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:13,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051594869] [2021-06-05 23:40:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:13,226 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 23:40:13,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:13,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051594869] [2021-06-05 23:40:13,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051594869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:13,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230235515] [2021-06-05 23:40:13,226 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 23:40:13,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:40:13,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:13,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:13,334 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 23:40:13,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230235515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:13,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:13,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:40:13,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902814833] [2021-06-05 23:40:13,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:40:13,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:13,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:40:13,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:40:13,335 INFO L87 Difference]: Start difference. First operand 1804 states and 5887 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:14,014 INFO L93 Difference]: Finished difference Result 4837 states and 14460 transitions. [2021-06-05 23:40:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:40:14,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:14,020 INFO L225 Difference]: With dead ends: 4837 [2021-06-05 23:40:14,020 INFO L226 Difference]: Without dead ends: 4833 [2021-06-05 23:40:14,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:40:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4833 states. [2021-06-05 23:40:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4833 to 1804. [2021-06-05 23:40:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2640044370493624) internal successors, (5885), 1803 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5885 transitions. [2021-06-05 23:40:14,065 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5885 transitions. Word has length 27 [2021-06-05 23:40:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:14,066 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5885 transitions. [2021-06-05 23:40:14,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5885 transitions. [2021-06-05 23:40:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:14,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:14,070 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:14,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 23:40:14,280 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:14,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2129252333, now seen corresponding path program 19 times [2021-06-05 23:40:14,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:14,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816897407] [2021-06-05 23:40:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:14,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:14,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816897407] [2021-06-05 23:40:14,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816897407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:14,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417658221] [2021-06-05 23:40:14,319 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 23:40:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:14,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:14,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:14,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417658221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:14,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:14,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:14,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250917579] [2021-06-05 23:40:14,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:14,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:14,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:14,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:14,458 INFO L87 Difference]: Start difference. First operand 1804 states and 5885 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:15,207 INFO L93 Difference]: Finished difference Result 4879 states and 14554 transitions. [2021-06-05 23:40:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:40:15,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:15,214 INFO L225 Difference]: With dead ends: 4879 [2021-06-05 23:40:15,214 INFO L226 Difference]: Without dead ends: 4879 [2021-06-05 23:40:15,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:40:15,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-06-05 23:40:15,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 1814. [2021-06-05 23:40:15,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2675124103695534) internal successors, (5924), 1813 states have internal predecessors, (5924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5924 transitions. [2021-06-05 23:40:15,263 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5924 transitions. Word has length 27 [2021-06-05 23:40:15,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:15,263 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5924 transitions. [2021-06-05 23:40:15,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5924 transitions. [2021-06-05 23:40:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:15,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:15,298 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:15,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 23:40:15,498 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:15,499 INFO L82 PathProgramCache]: Analyzing trace with hash -383065493, now seen corresponding path program 20 times [2021-06-05 23:40:15,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:15,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536956128] [2021-06-05 23:40:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:15,540 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 23:40:15,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:15,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536956128] [2021-06-05 23:40:15,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536956128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:15,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698327924] [2021-06-05 23:40:15,540 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 23:40:15,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:15,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:15,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:15,671 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 23:40:15,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698327924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:15,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:15,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:15,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915181436] [2021-06-05 23:40:15,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:15,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:15,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:15,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:15,672 INFO L87 Difference]: Start difference. First operand 1814 states and 5924 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:16,372 INFO L93 Difference]: Finished difference Result 4586 states and 13852 transitions. [2021-06-05 23:40:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:40:16,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:16,379 INFO L225 Difference]: With dead ends: 4586 [2021-06-05 23:40:16,379 INFO L226 Difference]: Without dead ends: 4582 [2021-06-05 23:40:16,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 369.6ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:40:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-06-05 23:40:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 1814. [2021-06-05 23:40:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2664092664092665) internal successors, (5922), 1813 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5922 transitions. [2021-06-05 23:40:16,429 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5922 transitions. Word has length 27 [2021-06-05 23:40:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:16,429 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5922 transitions. [2021-06-05 23:40:16,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5922 transitions. [2021-06-05 23:40:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:16,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:16,432 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:16,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:16,649 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:16,649 INFO L82 PathProgramCache]: Analyzing trace with hash 996125654, now seen corresponding path program 3 times [2021-06-05 23:40:16,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:16,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119079788] [2021-06-05 23:40:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:16,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:16,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119079788] [2021-06-05 23:40:16,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119079788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:16,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739655257] [2021-06-05 23:40:16,688 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 23:40:16,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:40:16,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:16,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:40:16,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:16,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739655257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:16,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:16,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:40:16,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391909525] [2021-06-05 23:40:16,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:40:16,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:16,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:40:16,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:40:16,760 INFO L87 Difference]: Start difference. First operand 1814 states and 5922 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 23:40:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:16,843 INFO L93 Difference]: Finished difference Result 1973 states and 6380 transitions. [2021-06-05 23:40:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:40:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 27 [2021-06-05 23:40:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:16,846 INFO L225 Difference]: With dead ends: 1973 [2021-06-05 23:40:16,846 INFO L226 Difference]: Without dead ends: 1973 [2021-06-05 23:40:16,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:40:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-06-05 23:40:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1690. [2021-06-05 23:40:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 3.2634695085849614) internal successors, (5512), 1689 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 5512 transitions. [2021-06-05 23:40:16,868 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 5512 transitions. Word has length 27 [2021-06-05 23:40:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:16,868 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 5512 transitions. [2021-06-05 23:40:16,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 23:40:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 5512 transitions. [2021-06-05 23:40:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:16,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:16,871 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:17,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 23:40:17,077 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:17,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1191947179, now seen corresponding path program 21 times [2021-06-05 23:40:17,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:17,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161338648] [2021-06-05 23:40:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:17,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:17,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161338648] [2021-06-05 23:40:17,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161338648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:17,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23438749] [2021-06-05 23:40:17,112 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 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 23:40:17,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:40:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:17,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23438749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:17,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:17,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:40:17,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474134560] [2021-06-05 23:40:17,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:40:17,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:17,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:40:17,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:40:17,228 INFO L87 Difference]: Start difference. First operand 1690 states and 5512 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 23:40:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:17,565 INFO L93 Difference]: Finished difference Result 3078 states and 9480 transitions. [2021-06-05 23:40:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:40:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-06-05 23:40:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:17,570 INFO L225 Difference]: With dead ends: 3078 [2021-06-05 23:40:17,570 INFO L226 Difference]: Without dead ends: 3078 [2021-06-05 23:40:17,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:40:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-05 23:40:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1814. [2021-06-05 23:40:17,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2465526751241036) internal successors, (5886), 1813 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5886 transitions. [2021-06-05 23:40:17,601 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5886 transitions. Word has length 27 [2021-06-05 23:40:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:17,601 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5886 transitions. [2021-06-05 23:40:17,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 23:40:17,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5886 transitions. [2021-06-05 23:40:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:17,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:17,605 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:17,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:17,821 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash -539419271, now seen corresponding path program 22 times [2021-06-05 23:40:17,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:17,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355089707] [2021-06-05 23:40:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:17,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:17,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355089707] [2021-06-05 23:40:17,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355089707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:17,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640052936] [2021-06-05 23:40:17,856 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 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 23:40:17,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:17,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:17,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:17,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:17,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640052936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:17,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:17,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 23:40:17,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732958278] [2021-06-05 23:40:17,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:40:17,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:17,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:40:17,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:40:17,937 INFO L87 Difference]: Start difference. First operand 1814 states and 5886 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 23:40:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:18,204 INFO L93 Difference]: Finished difference Result 3165 states and 9710 transitions. [2021-06-05 23:40:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:40:18,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 27 [2021-06-05 23:40:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:18,208 INFO L225 Difference]: With dead ends: 3165 [2021-06-05 23:40:18,208 INFO L226 Difference]: Without dead ends: 3165 [2021-06-05 23:40:18,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:40:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-06-05 23:40:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1928. [2021-06-05 23:40:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2283341982355993) internal successors, (6221), 1927 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6221 transitions. [2021-06-05 23:40:18,236 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6221 transitions. Word has length 27 [2021-06-05 23:40:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:18,236 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6221 transitions. [2021-06-05 23:40:18,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 23:40:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6221 transitions. [2021-06-05 23:40:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:18,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:18,239 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:18,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 23:40:18,439 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2089350211, now seen corresponding path program 23 times [2021-06-05 23:40:18,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:18,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766239854] [2021-06-05 23:40:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:18,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:18,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766239854] [2021-06-05 23:40:18,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766239854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:18,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037905738] [2021-06-05 23:40:18,470 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 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 23:40:18,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:40:18,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:18,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:18,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037905738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:18,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:18,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 23:40:18,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60319006] [2021-06-05 23:40:18,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:40:18,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:18,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:40:18,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:40:18,542 INFO L87 Difference]: Start difference. First operand 1928 states and 6221 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 23:40:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:18,764 INFO L93 Difference]: Finished difference Result 3029 states and 9362 transitions. [2021-06-05 23:40:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:40:18,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 27 [2021-06-05 23:40:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:18,768 INFO L225 Difference]: With dead ends: 3029 [2021-06-05 23:40:18,768 INFO L226 Difference]: Without dead ends: 3025 [2021-06-05 23:40:18,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:40:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-06-05 23:40:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 1928. [2021-06-05 23:40:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2272963155163468) internal successors, (6219), 1927 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6219 transitions. [2021-06-05 23:40:18,807 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6219 transitions. Word has length 27 [2021-06-05 23:40:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:18,807 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6219 transitions. [2021-06-05 23:40:18,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 23:40:18,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6219 transitions. [2021-06-05 23:40:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:18,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:18,811 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:19,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 23:40:19,032 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:19,033 INFO L82 PathProgramCache]: Analyzing trace with hash -597345479, now seen corresponding path program 24 times [2021-06-05 23:40:19,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:19,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670559956] [2021-06-05 23:40:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:19,065 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 23:40:19,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:19,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670559956] [2021-06-05 23:40:19,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670559956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:19,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323692331] [2021-06-05 23:40:19,066 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 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 23:40:19,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:40:19,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:19,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:19,135 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 23:40:19,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323692331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:19,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:19,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:40:19,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909361790] [2021-06-05 23:40:19,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:40:19,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:19,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:40:19,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:40:19,136 INFO L87 Difference]: Start difference. First operand 1928 states and 6219 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 23:40:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:19,414 INFO L93 Difference]: Finished difference Result 3009 states and 9316 transitions. [2021-06-05 23:40:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:40:19,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-06-05 23:40:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:19,418 INFO L225 Difference]: With dead ends: 3009 [2021-06-05 23:40:19,418 INFO L226 Difference]: Without dead ends: 2993 [2021-06-05 23:40:19,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:40:19,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-06-05 23:40:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1936. [2021-06-05 23:40:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 3.221188630490956) internal successors, (6233), 1935 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 6233 transitions. [2021-06-05 23:40:19,449 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 6233 transitions. Word has length 27 [2021-06-05 23:40:19,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:19,449 INFO L482 AbstractCegarLoop]: Abstraction has 1936 states and 6233 transitions. [2021-06-05 23:40:19,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 23:40:19,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 6233 transitions. [2021-06-05 23:40:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:19,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:19,453 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:19,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 23:40:19,669 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1743835577, now seen corresponding path program 25 times [2021-06-05 23:40:19,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:19,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459113946] [2021-06-05 23:40:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:19,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:19,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459113946] [2021-06-05 23:40:19,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459113946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:19,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434985223] [2021-06-05 23:40:19,708 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 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 23:40:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:19,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:19,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:19,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434985223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:19,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:19,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:19,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393330246] [2021-06-05 23:40:19,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:19,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:19,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:19,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:19,832 INFO L87 Difference]: Start difference. First operand 1936 states and 6233 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:20,402 INFO L93 Difference]: Finished difference Result 5256 states and 16466 transitions. [2021-06-05 23:40:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:40:20,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:20,414 INFO L225 Difference]: With dead ends: 5256 [2021-06-05 23:40:20,415 INFO L226 Difference]: Without dead ends: 5256 [2021-06-05 23:40:20,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:40:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-06-05 23:40:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 2054. [2021-06-05 23:40:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.297613248904043) internal successors, (6770), 2053 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 6770 transitions. [2021-06-05 23:40:20,464 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 6770 transitions. Word has length 27 [2021-06-05 23:40:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:20,464 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 6770 transitions. [2021-06-05 23:40:20,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 6770 transitions. [2021-06-05 23:40:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:20,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:20,467 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:20,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 23:40:20,670 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1549934909, now seen corresponding path program 26 times [2021-06-05 23:40:20,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:20,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835387036] [2021-06-05 23:40:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:20,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:20,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835387036] [2021-06-05 23:40:20,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835387036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:20,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030023430] [2021-06-05 23:40:20,715 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 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 23:40:20,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:20,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:20,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:20,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:20,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030023430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:20,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:20,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:20,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138786195] [2021-06-05 23:40:20,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:20,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:20,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:20,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:20,867 INFO L87 Difference]: Start difference. First operand 2054 states and 6770 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:21,395 INFO L93 Difference]: Finished difference Result 5169 states and 16251 transitions. [2021-06-05 23:40:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:40:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:21,402 INFO L225 Difference]: With dead ends: 5169 [2021-06-05 23:40:21,402 INFO L226 Difference]: Without dead ends: 5169 [2021-06-05 23:40:21,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:40:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2021-06-05 23:40:21,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 2051. [2021-06-05 23:40:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:21,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-05 23:40:21,440 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-05 23:40:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:21,440 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-05 23:40:21,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-05 23:40:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:21,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:21,443 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:21,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 23:40:21,644 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:21,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1178025143, now seen corresponding path program 27 times [2021-06-05 23:40:21,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:21,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826727704] [2021-06-05 23:40:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:21,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:21,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826727704] [2021-06-05 23:40:21,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826727704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:21,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468981394] [2021-06-05 23:40:21,678 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 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 23:40:21,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:40:21,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:21,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468981394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:21,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:21,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:40:21,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665388010] [2021-06-05 23:40:21,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:40:21,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:21,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:40:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:40:21,787 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:22,268 INFO L93 Difference]: Finished difference Result 4755 states and 14772 transitions. [2021-06-05 23:40:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:40:22,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:22,275 INFO L225 Difference]: With dead ends: 4755 [2021-06-05 23:40:22,276 INFO L226 Difference]: Without dead ends: 4755 [2021-06-05 23:40:22,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:40:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2021-06-05 23:40:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 2057. [2021-06-05 23:40:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-06-05 23:40:22,317 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-06-05 23:40:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:22,317 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-06-05 23:40:22,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:22,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-06-05 23:40:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:22,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:22,320 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:22,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:22,520 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:22,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:22,521 INFO L82 PathProgramCache]: Analyzing trace with hash 988806845, now seen corresponding path program 28 times [2021-06-05 23:40:22,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:22,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195484892] [2021-06-05 23:40:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:22,556 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 23:40:22,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:22,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195484892] [2021-06-05 23:40:22,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195484892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:22,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222830192] [2021-06-05 23:40:22,556 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 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 23:40:22,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:22,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:22,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:22,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:22,657 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 23:40:22,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222830192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:22,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:22,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:40:22,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370519022] [2021-06-05 23:40:22,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:40:22,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:22,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:40:22,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:40:22,658 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:23,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:23,062 INFO L93 Difference]: Finished difference Result 4606 states and 14402 transitions. [2021-06-05 23:40:23,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:40:23,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:23,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:23,067 INFO L225 Difference]: With dead ends: 4606 [2021-06-05 23:40:23,068 INFO L226 Difference]: Without dead ends: 4602 [2021-06-05 23:40:23,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 220.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:40:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2021-06-05 23:40:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 2051. [2021-06-05 23:40:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-05 23:40:23,105 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-05 23:40:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:23,105 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-05 23:40:23,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-05 23:40:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:23,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:23,108 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:23,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 23:40:23,309 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:23,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1916639235, now seen corresponding path program 29 times [2021-06-05 23:40:23,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:23,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349521998] [2021-06-05 23:40:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:23,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:23,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349521998] [2021-06-05 23:40:23,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349521998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:23,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862135457] [2021-06-05 23:40:23,341 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 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 23:40:23,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:40:23,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:23,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:23,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862135457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:23,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:23,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:23,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791858762] [2021-06-05 23:40:23,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:23,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:23,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:23,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:23,450 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:23,925 INFO L93 Difference]: Finished difference Result 4605 states and 14373 transitions. [2021-06-05 23:40:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:40:23,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:23,931 INFO L225 Difference]: With dead ends: 4605 [2021-06-05 23:40:23,931 INFO L226 Difference]: Without dead ends: 4605 [2021-06-05 23:40:23,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:40:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-06-05 23:40:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2057. [2021-06-05 23:40:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-06-05 23:40:23,967 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-06-05 23:40:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:23,967 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-06-05 23:40:23,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-06-05 23:40:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:23,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:23,970 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:24,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 23:40:24,171 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:24,171 INFO L82 PathProgramCache]: Analyzing trace with hash -133989765, now seen corresponding path program 30 times [2021-06-05 23:40:24,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:24,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736154724] [2021-06-05 23:40:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:24,204 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 23:40:24,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:24,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736154724] [2021-06-05 23:40:24,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736154724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:24,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719370879] [2021-06-05 23:40:24,205 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 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 23:40:24,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:40:24,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:24,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:24,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:24,300 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 23:40:24,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719370879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:24,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:24,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:24,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84771103] [2021-06-05 23:40:24,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:24,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:24,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:24,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:24,301 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:24,713 INFO L93 Difference]: Finished difference Result 4532 states and 14195 transitions. [2021-06-05 23:40:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:40:24,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:24,719 INFO L225 Difference]: With dead ends: 4532 [2021-06-05 23:40:24,719 INFO L226 Difference]: Without dead ends: 4528 [2021-06-05 23:40:24,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:40:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-06-05 23:40:24,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 2051. [2021-06-05 23:40:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-05 23:40:24,771 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-05 23:40:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:24,771 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-05 23:40:24,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-05 23:40:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:24,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:24,775 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:24,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:24,986 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:24,986 INFO L82 PathProgramCache]: Analyzing trace with hash 909278715, now seen corresponding path program 31 times [2021-06-05 23:40:24,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:24,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135326070] [2021-06-05 23:40:24,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:25,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:25,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135326070] [2021-06-05 23:40:25,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135326070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:25,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818238063] [2021-06-05 23:40:25,021 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 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 23:40:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:25,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:25,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:25,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818238063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:25,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:25,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:40:25,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268167029] [2021-06-05 23:40:25,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:40:25,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:25,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:40:25,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:40:25,121 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:25,502 INFO L93 Difference]: Finished difference Result 4168 states and 12771 transitions. [2021-06-05 23:40:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:40:25,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:25,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:25,507 INFO L225 Difference]: With dead ends: 4168 [2021-06-05 23:40:25,507 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 23:40:25,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:40:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 23:40:25,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2247. [2021-06-05 23:40:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.2996438112199464) internal successors, (7411), 2246 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7411 transitions. [2021-06-05 23:40:25,555 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7411 transitions. Word has length 27 [2021-06-05 23:40:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:25,555 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7411 transitions. [2021-06-05 23:40:25,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7411 transitions. [2021-06-05 23:40:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:25,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:25,558 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:25,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 23:40:25,759 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash 720060417, now seen corresponding path program 32 times [2021-06-05 23:40:25,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:25,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701551308] [2021-06-05 23:40:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:25,797 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 23:40:25,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:25,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701551308] [2021-06-05 23:40:25,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701551308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:25,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942168530] [2021-06-05 23:40:25,797 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 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 23:40:25,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:25,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:25,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:25,892 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 23:40:25,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942168530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:25,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:25,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:40:25,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533110865] [2021-06-05 23:40:25,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:40:25,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:25,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:40:25,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:40:25,893 INFO L87 Difference]: Start difference. First operand 2247 states and 7411 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:26,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:26,247 INFO L93 Difference]: Finished difference Result 3963 states and 12253 transitions. [2021-06-05 23:40:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:40:26,247 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:26,252 INFO L225 Difference]: With dead ends: 3963 [2021-06-05 23:40:26,252 INFO L226 Difference]: Without dead ends: 3959 [2021-06-05 23:40:26,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:40:26,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-05 23:40:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 2247. [2021-06-05 23:40:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.298753339269813) internal successors, (7409), 2246 states have internal predecessors, (7409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7409 transitions. [2021-06-05 23:40:26,286 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7409 transitions. Word has length 27 [2021-06-05 23:40:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:26,286 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7409 transitions. [2021-06-05 23:40:26,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7409 transitions. [2021-06-05 23:40:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:26,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:26,289 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:26,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:26,489 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1363442677, now seen corresponding path program 33 times [2021-06-05 23:40:26,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:26,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150491270] [2021-06-05 23:40:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:26,525 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 23:40:26,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:26,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150491270] [2021-06-05 23:40:26,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150491270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:26,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610544471] [2021-06-05 23:40:26,525 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 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 23:40:26,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:40:26,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:26,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:26,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:26,639 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 23:40:26,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610544471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:26,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:26,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:40:26,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938859384] [2021-06-05 23:40:26,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:40:26,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:26,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:40:26,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:40:26,641 INFO L87 Difference]: Start difference. First operand 2247 states and 7409 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:26,909 INFO L93 Difference]: Finished difference Result 3687 states and 11591 transitions. [2021-06-05 23:40:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:40:26,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:26,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:26,913 INFO L225 Difference]: With dead ends: 3687 [2021-06-05 23:40:26,913 INFO L226 Difference]: Without dead ends: 3671 [2021-06-05 23:40:26,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:26,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-05 23:40:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2247. [2021-06-05 23:40:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.296081923419412) internal successors, (7403), 2246 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7403 transitions. [2021-06-05 23:40:26,950 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7403 transitions. Word has length 27 [2021-06-05 23:40:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:26,950 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7403 transitions. [2021-06-05 23:40:26,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:26,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7403 transitions. [2021-06-05 23:40:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:26,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:26,953 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:27,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 23:40:27,154 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:27,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:27,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1675798649, now seen corresponding path program 34 times [2021-06-05 23:40:27,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:27,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145257855] [2021-06-05 23:40:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:27,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:27,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145257855] [2021-06-05 23:40:27,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145257855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:27,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764657366] [2021-06-05 23:40:27,188 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 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 23:40:27,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:27,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:27,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764657366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:27,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:27,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:27,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722296062] [2021-06-05 23:40:27,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:27,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:27,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:27,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:27,316 INFO L87 Difference]: Start difference. First operand 2247 states and 7403 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:27,685 INFO L93 Difference]: Finished difference Result 3798 states and 11861 transitions. [2021-06-05 23:40:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:40:27,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:27,690 INFO L225 Difference]: With dead ends: 3798 [2021-06-05 23:40:27,690 INFO L226 Difference]: Without dead ends: 3798 [2021-06-05 23:40:27,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:40:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-05 23:40:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 2417. [2021-06-05 23:40:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.287251655629139) internal successors, (7942), 2416 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7942 transitions. [2021-06-05 23:40:27,740 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7942 transitions. Word has length 27 [2021-06-05 23:40:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:27,740 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7942 transitions. [2021-06-05 23:40:27,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7942 transitions. [2021-06-05 23:40:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:27,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:27,745 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:27,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 23:40:27,961 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:27,961 INFO L82 PathProgramCache]: Analyzing trace with hash -836519177, now seen corresponding path program 35 times [2021-06-05 23:40:27,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:27,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995377450] [2021-06-05 23:40:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:27,997 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 23:40:27,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:27,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995377450] [2021-06-05 23:40:27,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995377450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:27,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722638532] [2021-06-05 23:40:27,998 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 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 23:40:28,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:40:28,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:28,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:28,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:28,123 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 23:40:28,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722638532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:28,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:28,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:40:28,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344656166] [2021-06-05 23:40:28,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:40:28,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:28,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:40:28,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:40:28,124 INFO L87 Difference]: Start difference. First operand 2417 states and 7942 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:28,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:28,517 INFO L93 Difference]: Finished difference Result 3765 states and 11785 transitions. [2021-06-05 23:40:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:40:28,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:40:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:28,522 INFO L225 Difference]: With dead ends: 3765 [2021-06-05 23:40:28,522 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 23:40:28,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:40:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 23:40:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2417. [2021-06-05 23:40:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2864238410596025) internal successors, (7940), 2416 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7940 transitions. [2021-06-05 23:40:28,562 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7940 transitions. Word has length 27 [2021-06-05 23:40:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:28,562 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7940 transitions. [2021-06-05 23:40:28,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7940 transitions. [2021-06-05 23:40:28,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:40:28,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:28,566 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:28,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 23:40:28,766 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1681490629, now seen corresponding path program 36 times [2021-06-05 23:40:28,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:28,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252190111] [2021-06-05 23:40:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:28,799 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 23:40:28,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:28,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252190111] [2021-06-05 23:40:28,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252190111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:28,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643556032] [2021-06-05 23:40:28,800 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 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 23:40:28,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:40:28,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:28,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:40:28,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:28,883 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 23:40:28,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643556032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:28,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:28,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:40:28,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678136251] [2021-06-05 23:40:28,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:40:28,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:28,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:40:28,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:40:28,884 INFO L87 Difference]: Start difference. First operand 2417 states and 7940 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 23:40:29,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:29,101 INFO L93 Difference]: Finished difference Result 3553 states and 11291 transitions. [2021-06-05 23:40:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:40:29,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-06-05 23:40:29,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:29,105 INFO L225 Difference]: With dead ends: 3553 [2021-06-05 23:40:29,106 INFO L226 Difference]: Without dead ends: 3537 [2021-06-05 23:40:29,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:40:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-06-05 23:40:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2417. [2021-06-05 23:40:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2839403973509933) internal successors, (7934), 2416 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7934 transitions. [2021-06-05 23:40:29,139 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7934 transitions. Word has length 27 [2021-06-05 23:40:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:29,139 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7934 transitions. [2021-06-05 23:40:29,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 23:40:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7934 transitions. [2021-06-05 23:40:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:29,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:29,142 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:29,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 23:40:29,342 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:29,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:29,343 INFO L82 PathProgramCache]: Analyzing trace with hash -374669691, now seen corresponding path program 4 times [2021-06-05 23:40:29,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:29,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455152898] [2021-06-05 23:40:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:29,694 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 23:40:29,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:29,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455152898] [2021-06-05 23:40:29,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455152898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:29,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898361757] [2021-06-05 23:40:29,694 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 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 23:40:29,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:29,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:29,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:29,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:29,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:29,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:29,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:40:29,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:29,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:30,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:30,000 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:40:30,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:30,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:30,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:30,008 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:40:30,027 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 23:40:30,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898361757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:30,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:30,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:40:30,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2308287] [2021-06-05 23:40:30,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:40:30,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:40:30,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:30,028 INFO L87 Difference]: Start difference. First operand 2417 states and 7934 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:31,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:31,390 INFO L93 Difference]: Finished difference Result 3291 states and 10537 transitions. [2021-06-05 23:40:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:40:31,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:31,394 INFO L225 Difference]: With dead ends: 3291 [2021-06-05 23:40:31,394 INFO L226 Difference]: Without dead ends: 3276 [2021-06-05 23:40:31,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1254.3ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:40:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-05 23:40:31,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2459. [2021-06-05 23:40:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 3.2782750203417415) internal successors, (8058), 2458 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 8058 transitions. [2021-06-05 23:40:31,426 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 8058 transitions. Word has length 30 [2021-06-05 23:40:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:31,426 INFO L482 AbstractCegarLoop]: Abstraction has 2459 states and 8058 transitions. [2021-06-05 23:40:31,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 8058 transitions. [2021-06-05 23:40:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:31,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:31,430 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:31,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:31,631 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1842042759, now seen corresponding path program 5 times [2021-06-05 23:40:31,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:31,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355200327] [2021-06-05 23:40:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:32,038 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 23:40:32,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:32,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355200327] [2021-06-05 23:40:32,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355200327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:32,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020760291] [2021-06-05 23:40:32,039 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 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 23:40:32,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:40:32,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:32,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:40:32,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:32,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:32,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:32,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:40:32,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:32,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:32,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:32,387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:40:32,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:32,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:32,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:32,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:40:32,416 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 23:40:32,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020760291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:32,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:32,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:40:32,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856125553] [2021-06-05 23:40:32,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:40:32,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:32,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:40:32,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:32,417 INFO L87 Difference]: Start difference. First operand 2459 states and 8058 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:33,971 INFO L93 Difference]: Finished difference Result 3258 states and 10455 transitions. [2021-06-05 23:40:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:40:33,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:33,975 INFO L225 Difference]: With dead ends: 3258 [2021-06-05 23:40:33,975 INFO L226 Difference]: Without dead ends: 3243 [2021-06-05 23:40:33,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1514.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:40:33,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-06-05 23:40:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 2471. [2021-06-05 23:40:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 3.2753036437246963) internal successors, (8090), 2470 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 8090 transitions. [2021-06-05 23:40:34,011 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 8090 transitions. Word has length 30 [2021-06-05 23:40:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:34,012 INFO L482 AbstractCegarLoop]: Abstraction has 2471 states and 8090 transitions. [2021-06-05 23:40:34,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 8090 transitions. [2021-06-05 23:40:34,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:34,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:34,014 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:34,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 23:40:34,215 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:34,215 INFO L82 PathProgramCache]: Analyzing trace with hash 545281552, now seen corresponding path program 37 times [2021-06-05 23:40:34,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:34,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806701404] [2021-06-05 23:40:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:34,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:34,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806701404] [2021-06-05 23:40:34,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806701404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:34,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496700025] [2021-06-05 23:40:34,653 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 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 23:40:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:40:34,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:34,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:34,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:34,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:40:34,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:34,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:34,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:34,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:34,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:34,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:34,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:40:34,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:34,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:34,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:34,951 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:40:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:34,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496700025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:34,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:34,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:40:34,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594137150] [2021-06-05 23:40:34,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:40:34,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:40:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:34,970 INFO L87 Difference]: Start difference. First operand 2471 states and 8090 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:38,055 INFO L93 Difference]: Finished difference Result 3524 states and 11150 transitions. [2021-06-05 23:40:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:40:38,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:38,060 INFO L225 Difference]: With dead ends: 3524 [2021-06-05 23:40:38,061 INFO L226 Difference]: Without dead ends: 3498 [2021-06-05 23:40:38,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 2666.4ms TimeCoverageRelationStatistics Valid=606, Invalid=4224, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:40:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-06-05 23:40:38,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 2550. [2021-06-05 23:40:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.26480972930561) internal successors, (8322), 2549 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8322 transitions. [2021-06-05 23:40:38,097 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8322 transitions. Word has length 30 [2021-06-05 23:40:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:38,097 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8322 transitions. [2021-06-05 23:40:38,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8322 transitions. [2021-06-05 23:40:38,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:38,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:38,101 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:38,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 23:40:38,305 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash 734179755, now seen corresponding path program 6 times [2021-06-05 23:40:38,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:38,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85993546] [2021-06-05 23:40:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:38,721 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 23:40:38,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:38,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85993546] [2021-06-05 23:40:38,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85993546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:38,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161854218] [2021-06-05 23:40:38,722 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:40:38,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:38,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:38,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:40:38,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:38,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:38,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:40:38,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:39,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:39,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:39,005 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:40:39,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:39,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:39,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:39,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:40:39,031 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 23:40:39,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161854218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:39,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:39,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 23:40:39,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922633190] [2021-06-05 23:40:39,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:40:39,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:39,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:40:39,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:40:39,032 INFO L87 Difference]: Start difference. First operand 2550 states and 8322 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:40,604 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 23:40:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:40,952 INFO L93 Difference]: Finished difference Result 3523 states and 11118 transitions. [2021-06-05 23:40:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:40:40,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:40,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:40,957 INFO L225 Difference]: With dead ends: 3523 [2021-06-05 23:40:40,957 INFO L226 Difference]: Without dead ends: 3508 [2021-06-05 23:40:40,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1721.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1620, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:40:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2021-06-05 23:40:40,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 2562. [2021-06-05 23:40:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2561 states have (on average 3.264349863334635) internal successors, (8360), 2561 states have internal predecessors, (8360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 8360 transitions. [2021-06-05 23:40:40,991 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 8360 transitions. Word has length 30 [2021-06-05 23:40:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:40,991 INFO L482 AbstractCegarLoop]: Abstraction has 2562 states and 8360 transitions. [2021-06-05 23:40:40,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 8360 transitions. [2021-06-05 23:40:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:40,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:40,995 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:41,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:41,195 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:41,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:41,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1579068384, now seen corresponding path program 38 times [2021-06-05 23:40:41,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:41,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71716850] [2021-06-05 23:40:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:41,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:41,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71716850] [2021-06-05 23:40:41,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71716850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:41,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123647381] [2021-06-05 23:40:41,607 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 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 23:40:41,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:41,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:41,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:40:41,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:41,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:41,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:41,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:40:41,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:41,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:41,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:41,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:41,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:41,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:41,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:40:41,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:41,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:41,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:41,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 23:40:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:42,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123647381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:42,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:42,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 23:40:42,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98915404] [2021-06-05 23:40:42,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:40:42,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:40:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:40:42,029 INFO L87 Difference]: Start difference. First operand 2562 states and 8360 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:46,583 INFO L93 Difference]: Finished difference Result 4192 states and 13134 transitions. [2021-06-05 23:40:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 23:40:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:46,590 INFO L225 Difference]: With dead ends: 4192 [2021-06-05 23:40:46,590 INFO L226 Difference]: Without dead ends: 4170 [2021-06-05 23:40:46,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2738 ImplicationChecksByTransitivity, 3796.2ms TimeCoverageRelationStatistics Valid=1026, Invalid=6984, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:40:46,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2021-06-05 23:40:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 2603. [2021-06-05 23:40:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 3.272098385857033) internal successors, (8514), 2602 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 8514 transitions. [2021-06-05 23:40:46,633 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 8514 transitions. Word has length 30 [2021-06-05 23:40:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:46,633 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 8514 transitions. [2021-06-05 23:40:46,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 8514 transitions. [2021-06-05 23:40:46,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:46,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:46,637 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:46,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 23:40:46,850 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:46,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1090547696, now seen corresponding path program 39 times [2021-06-05 23:40:46,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:46,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618200113] [2021-06-05 23:40:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:47,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:47,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618200113] [2021-06-05 23:40:47,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618200113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:47,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107006331] [2021-06-05 23:40:47,288 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 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 23:40:47,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:40:47,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:47,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:40:47,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:47,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:47,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:47,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:47,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:40:47,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:47,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:47,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:47,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:47,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:47,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:47,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:40:47,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:47,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:47,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:47,607 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:40:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:47,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107006331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:47,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:47,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:40:47,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348376402] [2021-06-05 23:40:47,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:40:47,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:47,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:40:47,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:40:47,632 INFO L87 Difference]: Start difference. First operand 2603 states and 8514 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:49,651 INFO L93 Difference]: Finished difference Result 4429 states and 13832 transitions. [2021-06-05 23:40:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:40:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:49,657 INFO L225 Difference]: With dead ends: 4429 [2021-06-05 23:40:49,657 INFO L226 Difference]: Without dead ends: 4414 [2021-06-05 23:40:49,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1644.6ms TimeCoverageRelationStatistics Valid=359, Invalid=2833, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:40:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4414 states. [2021-06-05 23:40:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4414 to 2732. [2021-06-05 23:40:49,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 3.258147198828268) internal successors, (8898), 2731 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 8898 transitions. [2021-06-05 23:40:49,697 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 8898 transitions. Word has length 30 [2021-06-05 23:40:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:49,697 INFO L482 AbstractCegarLoop]: Abstraction has 2732 states and 8898 transitions. [2021-06-05 23:40:49,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 8898 transitions. [2021-06-05 23:40:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:49,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:49,700 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:49,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:49,901 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1337444667, now seen corresponding path program 7 times [2021-06-05 23:40:49,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:49,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981134910] [2021-06-05 23:40:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:50,241 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 23:40:50,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:50,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981134910] [2021-06-05 23:40:50,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981134910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:50,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079269706] [2021-06-05 23:40:50,242 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 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 23:40:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:50,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:50,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:50,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:50,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:50,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:40:50,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:50,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:50,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:50,517 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:40:50,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:50,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:50,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:50,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:40:50,540 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 23:40:50,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079269706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:50,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:50,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:40:50,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233480228] [2021-06-05 23:40:50,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:40:50,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:50,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:40:50,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:50,541 INFO L87 Difference]: Start difference. First operand 2732 states and 8898 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:52,144 INFO L93 Difference]: Finished difference Result 3523 states and 11277 transitions. [2021-06-05 23:40:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:40:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:52,149 INFO L225 Difference]: With dead ends: 3523 [2021-06-05 23:40:52,149 INFO L226 Difference]: Without dead ends: 3508 [2021-06-05 23:40:52,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1424.3ms TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:40:52,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2021-06-05 23:40:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 2746. [2021-06-05 23:40:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.2568306010928962) internal successors, (8940), 2745 states have internal predecessors, (8940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 8940 transitions. [2021-06-05 23:40:52,182 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 8940 transitions. Word has length 30 [2021-06-05 23:40:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:52,183 INFO L482 AbstractCegarLoop]: Abstraction has 2746 states and 8940 transitions. [2021-06-05 23:40:52,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 8940 transitions. [2021-06-05 23:40:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:52,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:52,186 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:52,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 23:40:52,386 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:52,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1490149561, now seen corresponding path program 8 times [2021-06-05 23:40:52,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:52,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324795864] [2021-06-05 23:40:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:52,764 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 23:40:52,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:52,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324795864] [2021-06-05 23:40:52,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324795864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:52,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235557066] [2021-06-05 23:40:52,765 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 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 23:40:52,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:52,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:52,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:53,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:53,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:53,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:40:53,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:53,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:53,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:53,034 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:40:53,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:53,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:53,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:53,041 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:40:53,065 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 23:40:53,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235557066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:53,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:53,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 23:40:53,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686262926] [2021-06-05 23:40:53,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:40:53,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:40:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:40:53,067 INFO L87 Difference]: Start difference. First operand 2746 states and 8940 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:54,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:54,443 INFO L93 Difference]: Finished difference Result 3522 states and 11289 transitions. [2021-06-05 23:40:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:40:54,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:54,448 INFO L225 Difference]: With dead ends: 3522 [2021-06-05 23:40:54,448 INFO L226 Difference]: Without dead ends: 3507 [2021-06-05 23:40:54,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1408.6ms TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:40:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-06-05 23:40:54,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 2738. [2021-06-05 23:40:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2737 states have (on average 3.2586773839970773) internal successors, (8919), 2737 states have internal predecessors, (8919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 8919 transitions. [2021-06-05 23:40:54,484 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 8919 transitions. Word has length 30 [2021-06-05 23:40:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:54,484 INFO L482 AbstractCegarLoop]: Abstraction has 2738 states and 8919 transitions. [2021-06-05 23:40:54,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 8919 transitions. [2021-06-05 23:40:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:54,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:54,488 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:54,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:54,701 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1871627101, now seen corresponding path program 9 times [2021-06-05 23:40:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:54,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936337571] [2021-06-05 23:40:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:55,041 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 23:40:55,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:55,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936337571] [2021-06-05 23:40:55,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936337571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:55,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499613002] [2021-06-05 23:40:55,041 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 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 23:40:55,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:40:55,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:55,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:40:55,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:55,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:55,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:55,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:40:55,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:55,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:55,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:55,370 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:40:55,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:55,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:55,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:55,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-06-05 23:40:55,392 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 23:40:55,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499613002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:55,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:55,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:40:55,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550637540] [2021-06-05 23:40:55,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:40:55,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:55,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:40:55,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:40:55,394 INFO L87 Difference]: Start difference. First operand 2738 states and 8919 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:57,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:57,132 INFO L93 Difference]: Finished difference Result 3549 states and 11362 transitions. [2021-06-05 23:40:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:40:57,132 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:57,137 INFO L225 Difference]: With dead ends: 3549 [2021-06-05 23:40:57,137 INFO L226 Difference]: Without dead ends: 3534 [2021-06-05 23:40:57,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1635.2ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:40:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3534 states. [2021-06-05 23:40:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3534 to 2750. [2021-06-05 23:40:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 3.261913423062932) internal successors, (8967), 2749 states have internal predecessors, (8967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 8967 transitions. [2021-06-05 23:40:57,171 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 8967 transitions. Word has length 30 [2021-06-05 23:40:57,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:57,171 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 8967 transitions. [2021-06-05 23:40:57,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 8967 transitions. [2021-06-05 23:40:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:57,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:57,174 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:57,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 23:40:57,375 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash -283369625, now seen corresponding path program 10 times [2021-06-05 23:40:57,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:57,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553573846] [2021-06-05 23:40:57,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:57,782 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 23:40:57,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:57,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553573846] [2021-06-05 23:40:57,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553573846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:57,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641962673] [2021-06-05 23:40:57,783 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 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 23:40:57,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:57,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:57,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:40:57,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:58,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:58,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 23:40:58,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:58,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:58,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:58,077 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-06-05 23:40:58,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:58,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:58,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:58,087 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-06-05 23:40:58,113 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 23:40:58,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641962673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:58,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:58,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 23:40:58,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418619354] [2021-06-05 23:40:58,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:40:58,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:58,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:40:58,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:40:58,114 INFO L87 Difference]: Start difference. First operand 2750 states and 8967 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:59,256 INFO L93 Difference]: Finished difference Result 3755 states and 12023 transitions. [2021-06-05 23:40:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:40:59,257 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:59,262 INFO L225 Difference]: With dead ends: 3755 [2021-06-05 23:40:59,262 INFO L226 Difference]: Without dead ends: 3736 [2021-06-05 23:40:59,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1029.7ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:40:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-06-05 23:40:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 2798. [2021-06-05 23:40:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.262066499821237) internal successors, (9124), 2797 states have internal predecessors, (9124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 9124 transitions. [2021-06-05 23:40:59,298 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 9124 transitions. Word has length 30 [2021-06-05 23:40:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:59,298 INFO L482 AbstractCegarLoop]: Abstraction has 2798 states and 9124 transitions. [2021-06-05 23:40:59,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:59,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 9124 transitions. [2021-06-05 23:40:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:59,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:59,301 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:59,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 23:40:59,502 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:59,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:59,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2018141401, now seen corresponding path program 11 times [2021-06-05 23:40:59,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:59,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470330645] [2021-06-05 23:40:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:59,839 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 23:40:59,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:59,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470330645] [2021-06-05 23:40:59,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470330645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:59,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980546371] [2021-06-05 23:40:59,839 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 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 23:40:59,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:40:59,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:40:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:00,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:00,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:00,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:41:00,209 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:41:00,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:00,221 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:41:00,223 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:41:00,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:00,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:00,237 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:19 [2021-06-05 23:41:00,302 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 23:41:00,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980546371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:00,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:00,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:41:00,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171055837] [2021-06-05 23:41:00,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:41:00,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:41:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:41:00,303 INFO L87 Difference]: Start difference. First operand 2798 states and 9124 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 23:41:01,861 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-06-05 23:41:03,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:03,275 INFO L93 Difference]: Finished difference Result 4293 states and 13604 transitions. [2021-06-05 23:41:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:41:03,275 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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) Word has length 30 [2021-06-05 23:41:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:03,281 INFO L225 Difference]: With dead ends: 4293 [2021-06-05 23:41:03,281 INFO L226 Difference]: Without dead ends: 4263 [2021-06-05 23:41:03,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 2711.3ms TimeCoverageRelationStatistics Valid=682, Invalid=3874, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:41:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-06-05 23:41:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 2806. [2021-06-05 23:41:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2805 states have (on average 3.265597147950089) internal successors, (9160), 2805 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 9160 transitions. [2021-06-05 23:41:03,320 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 9160 transitions. Word has length 30 [2021-06-05 23:41:03,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:03,320 INFO L482 AbstractCegarLoop]: Abstraction has 2806 states and 9160 transitions. [2021-06-05 23:41:03,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 23:41:03,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 9160 transitions. [2021-06-05 23:41:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:03,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:03,324 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:03,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 23:41:03,524 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:03,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1392525593, now seen corresponding path program 12 times [2021-06-05 23:41:03,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:03,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892509630] [2021-06-05 23:41:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:03,985 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 23:41:03,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:03,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892509630] [2021-06-05 23:41:03,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892509630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:03,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896142098] [2021-06-05 23:41:03,986 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 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 23:41:04,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:41:04,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:04,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:41:04,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:04,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:04,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:04,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:41:04,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:41:04,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:04,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:04,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:04,362 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:41:04,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2021-06-05 23:41:04,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:04,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:41:04,372 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:41:04,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:04,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:04,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:04,432 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:48, output treesize:134 [2021-06-05 23:41:04,701 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 23:41:04,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896142098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:04,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:04,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 23:41:04,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385161446] [2021-06-05 23:41:04,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:41:04,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:41:04,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:41:04,703 INFO L87 Difference]: Start difference. First operand 2806 states and 9160 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:05,235 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 23:41:05,807 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 23:41:08,102 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-05 23:41:08,293 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 23:41:09,947 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 23:41:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:11,018 INFO L93 Difference]: Finished difference Result 4628 states and 14461 transitions. [2021-06-05 23:41:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:41:11,018 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:11,024 INFO L225 Difference]: With dead ends: 4628 [2021-06-05 23:41:11,024 INFO L226 Difference]: Without dead ends: 4594 [2021-06-05 23:41:11,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2473 ImplicationChecksByTransitivity, 5695.7ms TimeCoverageRelationStatistics Valid=1076, Invalid=6234, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 23:41:11,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4594 states. [2021-06-05 23:41:11,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4594 to 2839. [2021-06-05 23:41:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 3.276250880902044) internal successors, (9298), 2838 states have internal predecessors, (9298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:11,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 9298 transitions. [2021-06-05 23:41:11,069 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 9298 transitions. Word has length 30 [2021-06-05 23:41:11,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:11,069 INFO L482 AbstractCegarLoop]: Abstraction has 2839 states and 9298 transitions. [2021-06-05 23:41:11,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 9298 transitions. [2021-06-05 23:41:11,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:11,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:11,072 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:11,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:11,273 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:11,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:11,273 INFO L82 PathProgramCache]: Analyzing trace with hash 219121875, now seen corresponding path program 13 times [2021-06-05 23:41:11,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:11,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307328544] [2021-06-05 23:41:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:11,583 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 23:41:11,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:11,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307328544] [2021-06-05 23:41:11,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307328544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:11,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055274240] [2021-06-05 23:41:11,584 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 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 23:41:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:11,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:11,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:11,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:11,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:41:11,817 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:41:11,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:11,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:41:11,834 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:41:11,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:11,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:11,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:45, output treesize:35 [2021-06-05 23:41:11,941 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 23:41:11,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055274240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:11,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:11,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 23:41:11,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717393808] [2021-06-05 23:41:11,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:41:11,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:11,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:41:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:41:11,942 INFO L87 Difference]: Start difference. First operand 2839 states and 9298 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 23:41:12,322 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 23:41:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:14,223 INFO L93 Difference]: Finished difference Result 4183 states and 13379 transitions. [2021-06-05 23:41:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:41:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) Word has length 30 [2021-06-05 23:41:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:14,228 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 23:41:14,230 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 23:41:14,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2062.3ms TimeCoverageRelationStatistics Valid=517, Invalid=2345, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:41:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 23:41:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2843. [2021-06-05 23:41:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2843 states, 2842 states have (on average 3.277269528501056) internal successors, (9314), 2842 states have internal predecessors, (9314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2843 states to 2843 states and 9314 transitions. [2021-06-05 23:41:14,269 INFO L78 Accepts]: Start accepts. Automaton has 2843 states and 9314 transitions. Word has length 30 [2021-06-05 23:41:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:14,269 INFO L482 AbstractCegarLoop]: Abstraction has 2843 states and 9314 transitions. [2021-06-05 23:41:14,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 23:41:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2843 states and 9314 transitions. [2021-06-05 23:41:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:14,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:14,272 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:14,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:14,473 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash 532877149, now seen corresponding path program 14 times [2021-06-05 23:41:14,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:14,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515727914] [2021-06-05 23:41:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:14,872 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 23:41:14,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:14,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515727914] [2021-06-05 23:41:14,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515727914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:14,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370127278] [2021-06-05 23:41:14,873 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 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 23:41:14,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:41:14,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:14,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:15,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:15,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:15,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:41:15,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:15,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:15,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:15,174 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:41:15,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:15,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:15,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:15,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:41:15,207 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 23:41:15,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370127278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:15,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:15,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 23:41:15,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404326880] [2021-06-05 23:41:15,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:41:15,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:15,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:41:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:41:15,209 INFO L87 Difference]: Start difference. First operand 2843 states and 9314 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:16,815 INFO L93 Difference]: Finished difference Result 4177 states and 13157 transitions. [2021-06-05 23:41:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:41:16,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:16,821 INFO L225 Difference]: With dead ends: 4177 [2021-06-05 23:41:16,821 INFO L226 Difference]: Without dead ends: 4162 [2021-06-05 23:41:16,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1586.1ms TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:41:16,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2021-06-05 23:41:16,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 2853. [2021-06-05 23:41:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 3.2808555399719497) internal successors, (9357), 2852 states have internal predecessors, (9357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 9357 transitions. [2021-06-05 23:41:16,861 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 9357 transitions. Word has length 30 [2021-06-05 23:41:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:16,861 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 9357 transitions. [2021-06-05 23:41:16,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 9357 transitions. [2021-06-05 23:41:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:16,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:16,864 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:17,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 23:41:17,065 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:17,065 INFO L82 PathProgramCache]: Analyzing trace with hash -346175458, now seen corresponding path program 40 times [2021-06-05 23:41:17,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:17,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110888404] [2021-06-05 23:41:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:17,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:17,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110888404] [2021-06-05 23:41:17,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110888404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:17,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808414578] [2021-06-05 23:41:17,468 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 23:41:17,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:41:17,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:17,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:41:17,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:17,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:17,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:17,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:17,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:41:17,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:17,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:17,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:17,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:17,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:17,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:17,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:41:17,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:17,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:17,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:17,749 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:41:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:17,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808414578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:17,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:17,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:41:17,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776180273] [2021-06-05 23:41:17,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:41:17,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:17,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:41:17,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:41:17,773 INFO L87 Difference]: Start difference. First operand 2853 states and 9357 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:20,991 INFO L93 Difference]: Finished difference Result 5560 states and 17309 transitions. [2021-06-05 23:41:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:41:20,992 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:20,999 INFO L225 Difference]: With dead ends: 5560 [2021-06-05 23:41:20,999 INFO L226 Difference]: Without dead ends: 5530 [2021-06-05 23:41:21,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 2647.3ms TimeCoverageRelationStatistics Valid=575, Invalid=3715, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:41:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5530 states. [2021-06-05 23:41:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5530 to 2919. [2021-06-05 23:41:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2919 states, 2918 states have (on average 3.296435915010281) internal successors, (9619), 2918 states have internal predecessors, (9619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2919 states to 2919 states and 9619 transitions. [2021-06-05 23:41:21,052 INFO L78 Accepts]: Start accepts. Automaton has 2919 states and 9619 transitions. Word has length 30 [2021-06-05 23:41:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:21,052 INFO L482 AbstractCegarLoop]: Abstraction has 2919 states and 9619 transitions. [2021-06-05 23:41:21,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:21,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2919 states and 9619 transitions. [2021-06-05 23:41:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:21,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:21,055 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:21,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 23:41:21,255 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:21,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1160716775, now seen corresponding path program 15 times [2021-06-05 23:41:21,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:21,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704875975] [2021-06-05 23:41:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:21,644 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 23:41:21,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:21,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704875975] [2021-06-05 23:41:21,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704875975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:21,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751501953] [2021-06-05 23:41:21,645 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 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 23:41:21,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:41:21,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:21,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:41:21,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:21,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:21,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:41:21,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:21,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:21,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:21,929 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:41:21,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:21,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:21,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:21,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:41:21,959 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 23:41:21,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751501953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:21,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:21,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 23:41:21,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338221443] [2021-06-05 23:41:21,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:41:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:41:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:41:21,960 INFO L87 Difference]: Start difference. First operand 2919 states and 9619 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:24,039 INFO L93 Difference]: Finished difference Result 4518 states and 14368 transitions. [2021-06-05 23:41:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:41:24,040 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:24,046 INFO L225 Difference]: With dead ends: 4518 [2021-06-05 23:41:24,046 INFO L226 Difference]: Without dead ends: 4503 [2021-06-05 23:41:24,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1724.3ms TimeCoverageRelationStatistics Valid=388, Invalid=1592, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:41:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2021-06-05 23:41:24,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 2923. [2021-06-05 23:41:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.2973990417522243) internal successors, (9635), 2922 states have internal predecessors, (9635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 9635 transitions. [2021-06-05 23:41:24,099 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 9635 transitions. Word has length 30 [2021-06-05 23:41:24,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:24,099 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 9635 transitions. [2021-06-05 23:41:24,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:24,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 9635 transitions. [2021-06-05 23:41:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:24,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:24,103 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:24,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:24,317 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:24,317 INFO L82 PathProgramCache]: Analyzing trace with hash 644831361, now seen corresponding path program 16 times [2021-06-05 23:41:24,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:24,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090317811] [2021-06-05 23:41:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:24,696 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 23:41:24,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:24,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090317811] [2021-06-05 23:41:24,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090317811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:24,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077379797] [2021-06-05 23:41:24,697 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 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 23:41:24,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:41:24,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:24,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:24,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:24,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:24,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:24,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:41:24,939 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:41:24,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:24,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:41:24,957 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:41:24,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:24,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:24,968 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:45, output treesize:35 [2021-06-05 23:41:25,034 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 23:41:25,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077379797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:25,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:25,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 23:41:25,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787239470] [2021-06-05 23:41:25,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:41:25,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:41:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:41:25,035 INFO L87 Difference]: Start difference. First operand 2923 states and 9635 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 23:41:27,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:27,749 INFO L93 Difference]: Finished difference Result 5015 states and 15922 transitions. [2021-06-05 23:41:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:41:27,750 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) Word has length 30 [2021-06-05 23:41:27,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:27,756 INFO L225 Difference]: With dead ends: 5015 [2021-06-05 23:41:27,756 INFO L226 Difference]: Without dead ends: 5000 [2021-06-05 23:41:27,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2316.2ms TimeCoverageRelationStatistics Valid=635, Invalid=2787, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:41:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2021-06-05 23:41:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 2919. [2021-06-05 23:41:27,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2919 states, 2918 states have (on average 3.296435915010281) internal successors, (9619), 2918 states have internal predecessors, (9619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2919 states to 2919 states and 9619 transitions. [2021-06-05 23:41:27,804 INFO L78 Accepts]: Start accepts. Automaton has 2919 states and 9619 transitions. Word has length 30 [2021-06-05 23:41:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:27,804 INFO L482 AbstractCegarLoop]: Abstraction has 2919 states and 9619 transitions. [2021-06-05 23:41:27,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 23:41:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2919 states and 9619 transitions. [2021-06-05 23:41:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:27,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:27,807 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:28,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 23:41:28,008 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:28,008 INFO L82 PathProgramCache]: Analyzing trace with hash -629547184, now seen corresponding path program 41 times [2021-06-05 23:41:28,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:28,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774643640] [2021-06-05 23:41:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:28,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:28,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774643640] [2021-06-05 23:41:28,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774643640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:28,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344623480] [2021-06-05 23:41:28,446 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 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 23:41:28,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:41:28,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:28,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:41:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:28,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:28,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:28,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:28,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:28,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:41:28,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:28,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:28,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:28,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:28,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:28,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:28,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:41:28,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:28,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:28,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:28,754 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:41:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:28,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344623480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:28,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:28,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:41:28,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209707080] [2021-06-05 23:41:28,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:41:28,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:28,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:41:28,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:41:28,777 INFO L87 Difference]: Start difference. First operand 2919 states and 9619 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:31,623 INFO L93 Difference]: Finished difference Result 5228 states and 16457 transitions. [2021-06-05 23:41:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:41:31,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:31,630 INFO L225 Difference]: With dead ends: 5228 [2021-06-05 23:41:31,631 INFO L226 Difference]: Without dead ends: 5198 [2021-06-05 23:41:31,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2426.9ms TimeCoverageRelationStatistics Valid=569, Invalid=3337, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:41:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2021-06-05 23:41:31,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 2923. [2021-06-05 23:41:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.2973990417522243) internal successors, (9635), 2922 states have internal predecessors, (9635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 9635 transitions. [2021-06-05 23:41:31,679 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 9635 transitions. Word has length 30 [2021-06-05 23:41:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:31,680 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 9635 transitions. [2021-06-05 23:41:31,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 9635 transitions. [2021-06-05 23:41:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:31,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:31,684 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:31,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:31,884 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1143560652, now seen corresponding path program 42 times [2021-06-05 23:41:31,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:31,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185007988] [2021-06-05 23:41:31,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:32,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:32,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185007988] [2021-06-05 23:41:32,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185007988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:32,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464793581] [2021-06-05 23:41:32,360 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 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 23:41:32,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:41:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:32,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:41:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:32,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:32,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 23:41:32,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:41:32,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:32,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:32,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:32,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:41:32,673 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:41:32,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:32,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:32,682 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:15 [2021-06-05 23:41:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:32,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464793581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:32,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:32,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 23:41:32,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513442727] [2021-06-05 23:41:32,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:41:32,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:32,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:41:32,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:41:32,749 INFO L87 Difference]: Start difference. First operand 2923 states and 9635 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:33,943 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 23:41:34,585 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 23:41:34,720 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 23:41:35,741 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 23:41:36,044 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 23:41:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:37,367 INFO L93 Difference]: Finished difference Result 5847 states and 18297 transitions. [2021-06-05 23:41:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:41:37,367 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:37,376 INFO L225 Difference]: With dead ends: 5847 [2021-06-05 23:41:37,376 INFO L226 Difference]: Without dead ends: 5821 [2021-06-05 23:41:37,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 4130.0ms TimeCoverageRelationStatistics Valid=1099, Invalid=5873, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:41:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2021-06-05 23:41:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 2935. [2021-06-05 23:41:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.3012951601908656) internal successors, (9686), 2934 states have internal predecessors, (9686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 9686 transitions. [2021-06-05 23:41:37,431 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 9686 transitions. Word has length 30 [2021-06-05 23:41:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:37,431 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 9686 transitions. [2021-06-05 23:41:37,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 9686 transitions. [2021-06-05 23:41:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:37,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:37,436 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:37,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-06-05 23:41:37,657 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:37,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:37,658 INFO L82 PathProgramCache]: Analyzing trace with hash -87419736, now seen corresponding path program 43 times [2021-06-05 23:41:37,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:37,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378153053] [2021-06-05 23:41:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:38,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:38,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378153053] [2021-06-05 23:41:38,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378153053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:38,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995300315] [2021-06-05 23:41:38,024 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 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 23:41:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:41:38,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:38,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:38,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:38,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:38,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:41:38,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:38,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:38,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:38,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:38,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:41:38,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:38,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:38,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:38,283 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:41:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:38,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995300315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:38,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:38,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:41:38,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482035045] [2021-06-05 23:41:38,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:41:38,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:38,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:41:38,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:41:38,301 INFO L87 Difference]: Start difference. First operand 2935 states and 9686 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:42,955 INFO L93 Difference]: Finished difference Result 4163 states and 13221 transitions. [2021-06-05 23:41:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:41:42,955 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:42,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:42,961 INFO L225 Difference]: With dead ends: 4163 [2021-06-05 23:41:42,961 INFO L226 Difference]: Without dead ends: 4137 [2021-06-05 23:41:42,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 3787.3ms TimeCoverageRelationStatistics Valid=784, Invalid=5858, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 23:41:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2021-06-05 23:41:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 2929. [2021-06-05 23:41:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2928 states have (on average 3.3008879781420766) internal successors, (9665), 2928 states have internal predecessors, (9665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 9665 transitions. [2021-06-05 23:41:42,999 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 9665 transitions. Word has length 30 [2021-06-05 23:41:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:42,999 INFO L482 AbstractCegarLoop]: Abstraction has 2929 states and 9665 transitions. [2021-06-05 23:41:42,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 9665 transitions. [2021-06-05 23:41:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:43,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:43,002 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:43,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:43,203 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:43,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:43,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1495200599, now seen corresponding path program 17 times [2021-06-05 23:41:43,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:43,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582127351] [2021-06-05 23:41:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:43,559 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 23:41:43,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:43,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582127351] [2021-06-05 23:41:43,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582127351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:43,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794220801] [2021-06-05 23:41:43,560 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:43,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:41:43,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:43,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:41:43,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:43,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:43,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:41:43,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:43,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:43,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:43,842 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:41:43,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:43,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:43,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:43,848 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:41:43,869 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 23:41:43,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794220801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:43,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:43,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:41:43,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016372254] [2021-06-05 23:41:43,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:41:43,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:43,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:41:43,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:41:43,870 INFO L87 Difference]: Start difference. First operand 2929 states and 9665 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:45,327 INFO L93 Difference]: Finished difference Result 3787 states and 12308 transitions. [2021-06-05 23:41:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:41:45,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:45,333 INFO L225 Difference]: With dead ends: 3787 [2021-06-05 23:41:45,333 INFO L226 Difference]: Without dead ends: 3772 [2021-06-05 23:41:45,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1377.8ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:41:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-06-05 23:41:45,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 2922. [2021-06-05 23:41:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.2992125984251968) internal successors, (9637), 2921 states have internal predecessors, (9637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:45,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 9637 transitions. [2021-06-05 23:41:45,370 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 9637 transitions. Word has length 30 [2021-06-05 23:41:45,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:45,370 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 9637 transitions. [2021-06-05 23:41:45,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:45,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 9637 transitions. [2021-06-05 23:41:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:45,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:45,373 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:45,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 23:41:45,574 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash -547029519, now seen corresponding path program 18 times [2021-06-05 23:41:45,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:45,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679704046] [2021-06-05 23:41:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:46,039 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 23:41:46,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:46,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679704046] [2021-06-05 23:41:46,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679704046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:46,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733341012] [2021-06-05 23:41:46,040 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 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 23:41:46,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:41:46,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:46,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:41:46,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:46,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:46,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:41:46,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:41:46,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:46,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:46,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:41:46,314 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:41:46,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:46,330 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:41:46,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:41:46,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:46,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:46,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:46,346 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:40, output treesize:34 [2021-06-05 23:41:46,493 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 23:41:46,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733341012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:46,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:46,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:41:46,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099037288] [2021-06-05 23:41:46,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:41:46,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:46,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:41:46,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:41:46,494 INFO L87 Difference]: Start difference. First operand 2922 states and 9637 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:49,098 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-06-05 23:41:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:50,513 INFO L93 Difference]: Finished difference Result 4681 states and 14736 transitions. [2021-06-05 23:41:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:41:50,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:50,521 INFO L225 Difference]: With dead ends: 4681 [2021-06-05 23:41:50,521 INFO L226 Difference]: Without dead ends: 4632 [2021-06-05 23:41:50,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 3583.8ms TimeCoverageRelationStatistics Valid=678, Invalid=5022, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 23:41:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-06-05 23:41:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 2963. [2021-06-05 23:41:50,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 3.3048615800135046) internal successors, (9789), 2962 states have internal predecessors, (9789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 9789 transitions. [2021-06-05 23:41:50,592 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 9789 transitions. Word has length 30 [2021-06-05 23:41:50,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:50,593 INFO L482 AbstractCegarLoop]: Abstraction has 2963 states and 9789 transitions. [2021-06-05 23:41:50,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 9789 transitions. [2021-06-05 23:41:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:50,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:50,597 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:50,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:50,797 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:50,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:50,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1980979105, now seen corresponding path program 19 times [2021-06-05 23:41:50,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:50,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731537236] [2021-06-05 23:41:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:51,213 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 23:41:51,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731537236] [2021-06-05 23:41:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731537236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162590970] [2021-06-05 23:41:51,214 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 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 23:41:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:51,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:51,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:51,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:51,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:41:51,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:51,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:51,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:51,534 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:41:51,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:51,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:51,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:51,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:41:51,559 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 23:41:51,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162590970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:51,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:51,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:41:51,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42364840] [2021-06-05 23:41:51,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:41:51,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:51,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:41:51,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:41:51,560 INFO L87 Difference]: Start difference. First operand 2963 states and 9789 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:52,990 INFO L93 Difference]: Finished difference Result 3786 states and 12282 transitions. [2021-06-05 23:41:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:41:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:52,995 INFO L225 Difference]: With dead ends: 3786 [2021-06-05 23:41:52,996 INFO L226 Difference]: Without dead ends: 3771 [2021-06-05 23:41:52,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1414.3ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:41:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2021-06-05 23:41:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 2955. [2021-06-05 23:41:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 3.3039945836154367) internal successors, (9760), 2954 states have internal predecessors, (9760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 9760 transitions. [2021-06-05 23:41:53,035 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 9760 transitions. Word has length 30 [2021-06-05 23:41:53,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:53,035 INFO L482 AbstractCegarLoop]: Abstraction has 2955 states and 9760 transitions. [2021-06-05 23:41:53,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:53,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 9760 transitions. [2021-06-05 23:41:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:53,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:53,039 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:53,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:53,240 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash -824252081, now seen corresponding path program 20 times [2021-06-05 23:41:53,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:53,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059042433] [2021-06-05 23:41:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:53,653 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 23:41:53,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:53,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059042433] [2021-06-05 23:41:53,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059042433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:53,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945269868] [2021-06-05 23:41:53,653 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 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 23:41:53,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:41:53,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:53,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:53,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:53,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:41:53,918 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:41:53,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:53,928 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:41:53,929 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:41:53,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:53,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:53,939 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:19 [2021-06-05 23:41:53,984 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 23:41:53,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945269868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:53,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:53,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:41:53,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771031964] [2021-06-05 23:41:53,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:41:53,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:41:53,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:41:53,986 INFO L87 Difference]: Start difference. First operand 2955 states and 9760 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:55,910 INFO L93 Difference]: Finished difference Result 4354 states and 13980 transitions. [2021-06-05 23:41:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:41:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:55,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:55,916 INFO L225 Difference]: With dead ends: 4354 [2021-06-05 23:41:55,916 INFO L226 Difference]: Without dead ends: 4329 [2021-06-05 23:41:55,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1713.1ms TimeCoverageRelationStatistics Valid=399, Invalid=2051, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:41:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2021-06-05 23:41:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 2956. [2021-06-05 23:41:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.301861252115059) internal successors, (9757), 2955 states have internal predecessors, (9757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 9757 transitions. [2021-06-05 23:41:55,958 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 9757 transitions. Word has length 30 [2021-06-05 23:41:55,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:55,958 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 9757 transitions. [2021-06-05 23:41:55,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:55,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 9757 transitions. [2021-06-05 23:41:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:55,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:55,961 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:56,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:56,162 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:56,162 INFO L82 PathProgramCache]: Analyzing trace with hash 480483767, now seen corresponding path program 21 times [2021-06-05 23:41:56,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:56,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092164753] [2021-06-05 23:41:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:56,511 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 23:41:56,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:56,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092164753] [2021-06-05 23:41:56,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092164753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:56,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522797263] [2021-06-05 23:41:56,511 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 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 23:41:56,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:41:56,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:56,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:41:56,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:56,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:56,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:56,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:41:56,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:56,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:56,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:56,779 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:41:56,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:56,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:56,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:56,787 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-06-05 23:41:56,808 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 23:41:56,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522797263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:56,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:56,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:41:56,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888679707] [2021-06-05 23:41:56,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:41:56,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:56,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:41:56,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:41:56,809 INFO L87 Difference]: Start difference. First operand 2956 states and 9757 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:57,885 INFO L93 Difference]: Finished difference Result 3870 states and 12520 transitions. [2021-06-05 23:41:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:41:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:57,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:57,891 INFO L225 Difference]: With dead ends: 3870 [2021-06-05 23:41:57,891 INFO L226 Difference]: Without dead ends: 3849 [2021-06-05 23:41:57,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 985.3ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:41:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2021-06-05 23:41:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 2956. [2021-06-05 23:41:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.301861252115059) internal successors, (9757), 2955 states have internal predecessors, (9757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 9757 transitions. [2021-06-05 23:41:57,929 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 9757 transitions. Word has length 30 [2021-06-05 23:41:57,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:57,929 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 9757 transitions. [2021-06-05 23:41:57,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 9757 transitions. [2021-06-05 23:41:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:57,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:57,933 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:58,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:58,134 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash -463154315, now seen corresponding path program 22 times [2021-06-05 23:41:58,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:58,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408492971] [2021-06-05 23:41:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:58,528 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 23:41:58,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:58,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408492971] [2021-06-05 23:41:58,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408492971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:58,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53131633] [2021-06-05 23:41:58,529 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 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 23:41:58,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:41:58,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:58,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:58,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:58,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:58,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:41:58,745 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:41:58,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:58,754 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:41:58,755 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:41:58,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:58,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:58,765 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:28 [2021-06-05 23:41:58,839 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 23:41:58,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53131633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:58,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:58,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-06-05 23:41:58,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980547401] [2021-06-05 23:41:58,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:41:58,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:58,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:41:58,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:41:58,840 INFO L87 Difference]: Start difference. First operand 2956 states and 9757 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:00,367 INFO L93 Difference]: Finished difference Result 4115 states and 13367 transitions. [2021-06-05 23:42:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:42:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:00,376 INFO L225 Difference]: With dead ends: 4115 [2021-06-05 23:42:00,376 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 23:42:00,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1396.8ms TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:42:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 23:42:00,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 2971. [2021-06-05 23:42:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2970 states have (on average 3.3057239057239056) internal successors, (9818), 2970 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 9818 transitions. [2021-06-05 23:42:00,437 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 9818 transitions. Word has length 30 [2021-06-05 23:42:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:00,437 INFO L482 AbstractCegarLoop]: Abstraction has 2971 states and 9818 transitions. [2021-06-05 23:42:00,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 9818 transitions. [2021-06-05 23:42:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:00,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:00,442 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:00,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 23:42:00,657 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:00,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:00,657 INFO L82 PathProgramCache]: Analyzing trace with hash 789377209, now seen corresponding path program 23 times [2021-06-05 23:42:00,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:00,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417100759] [2021-06-05 23:42:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:01,070 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 23:42:01,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:01,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417100759] [2021-06-05 23:42:01,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417100759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:01,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492258269] [2021-06-05 23:42:01,070 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 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 23:42:01,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:42:01,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:01,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:42:01,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:01,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:01,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:42:01,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:01,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:01,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:01,389 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:42:01,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:01,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:01,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:01,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:42:01,420 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 23:42:01,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492258269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:01,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:01,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:42:01,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541358680] [2021-06-05 23:42:01,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:42:01,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:01,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:42:01,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:42:01,421 INFO L87 Difference]: Start difference. First operand 2971 states and 9818 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:02,728 INFO L93 Difference]: Finished difference Result 3788 states and 12331 transitions. [2021-06-05 23:42:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:42:02,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:02,733 INFO L225 Difference]: With dead ends: 3788 [2021-06-05 23:42:02,734 INFO L226 Difference]: Without dead ends: 3773 [2021-06-05 23:42:02,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1329.4ms TimeCoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:42:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-06-05 23:42:02,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 2991. [2021-06-05 23:42:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.3060200668896322) internal successors, (9885), 2990 states have internal predecessors, (9885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 9885 transitions. [2021-06-05 23:42:02,776 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 9885 transitions. Word has length 30 [2021-06-05 23:42:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:02,776 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 9885 transitions. [2021-06-05 23:42:02,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 9885 transitions. [2021-06-05 23:42:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:02,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:02,780 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:02,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 23:42:02,980 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1700041951, now seen corresponding path program 24 times [2021-06-05 23:42:02,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:02,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12283948] [2021-06-05 23:42:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:03,403 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 23:42:03,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:03,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12283948] [2021-06-05 23:42:03,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12283948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:03,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480202500] [2021-06-05 23:42:03,403 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 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 23:42:03,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:42:03,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:03,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:42:03,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:03,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:03,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:03,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:03,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:42:03,586 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:03,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:03,594 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:42:03,596 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:03,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:03,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:03,602 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:42:03,669 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 23:42:03,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480202500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:03,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:03,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:42:03,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445905490] [2021-06-05 23:42:03,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:42:03,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:03,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:42:03,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:42:03,670 INFO L87 Difference]: Start difference. First operand 2991 states and 9885 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:06,290 INFO L93 Difference]: Finished difference Result 4641 states and 15069 transitions. [2021-06-05 23:42:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:42:06,290 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:06,297 INFO L225 Difference]: With dead ends: 4641 [2021-06-05 23:42:06,297 INFO L226 Difference]: Without dead ends: 4616 [2021-06-05 23:42:06,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 2315.0ms TimeCoverageRelationStatistics Valid=576, Invalid=3714, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:42:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4616 states. [2021-06-05 23:42:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4616 to 3000. [2021-06-05 23:42:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2999 states have (on average 3.304768256085362) internal successors, (9911), 2999 states have internal predecessors, (9911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 9911 transitions. [2021-06-05 23:42:06,343 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 9911 transitions. Word has length 30 [2021-06-05 23:42:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:06,343 INFO L482 AbstractCegarLoop]: Abstraction has 3000 states and 9911 transitions. [2021-06-05 23:42:06,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 9911 transitions. [2021-06-05 23:42:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:06,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:06,346 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:06,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 23:42:06,547 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash 781952877, now seen corresponding path program 25 times [2021-06-05 23:42:06,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:06,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314631532] [2021-06-05 23:42:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:06,952 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 23:42:06,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314631532] [2021-06-05 23:42:06,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314631532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614139810] [2021-06-05 23:42:06,952 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 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 23:42:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:06,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:42:06,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:07,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:07,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:07,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:42:07,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:07,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:07,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:07,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:07,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2021-06-05 23:42:07,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:07,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:07,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:07,194 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:10 [2021-06-05 23:42:07,225 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 23:42:07,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614139810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:07,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:07,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:42:07,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978622136] [2021-06-05 23:42:07,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:42:07,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:07,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:42:07,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:42:07,227 INFO L87 Difference]: Start difference. First operand 3000 states and 9911 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 23:42:08,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:08,635 INFO L93 Difference]: Finished difference Result 4058 states and 13026 transitions. [2021-06-05 23:42:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:42:08,635 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) Word has length 30 [2021-06-05 23:42:08,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:08,641 INFO L225 Difference]: With dead ends: 4058 [2021-06-05 23:42:08,641 INFO L226 Difference]: Without dead ends: 4043 [2021-06-05 23:42:08,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1352.6ms TimeCoverageRelationStatistics Valid=389, Invalid=1503, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:42:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2021-06-05 23:42:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 3000. [2021-06-05 23:42:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2999 states have (on average 3.302767589196399) internal successors, (9905), 2999 states have internal predecessors, (9905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 9905 transitions. [2021-06-05 23:42:08,681 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 9905 transitions. Word has length 30 [2021-06-05 23:42:08,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:08,681 INFO L482 AbstractCegarLoop]: Abstraction has 3000 states and 9905 transitions. [2021-06-05 23:42:08,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 23:42:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 9905 transitions. [2021-06-05 23:42:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:08,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:08,684 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:08,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 23:42:08,885 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:08,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:08,885 INFO L82 PathProgramCache]: Analyzing trace with hash -911641047, now seen corresponding path program 26 times [2021-06-05 23:42:08,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:08,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537494766] [2021-06-05 23:42:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:09,261 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 23:42:09,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:09,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537494766] [2021-06-05 23:42:09,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537494766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:09,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037888646] [2021-06-05 23:42:09,261 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 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 23:42:09,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:09,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:09,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:42:09,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:09,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:09,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:42:09,443 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:09,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:09,470 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:42:09,471 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:09,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:09,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:09,478 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:42:09,540 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 23:42:09,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037888646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:09,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:09,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:42:09,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024153489] [2021-06-05 23:42:09,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:42:09,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:09,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:42:09,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:42:09,541 INFO L87 Difference]: Start difference. First operand 3000 states and 9905 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:12,552 INFO L93 Difference]: Finished difference Result 4686 states and 14963 transitions. [2021-06-05 23:42:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:42:12,552 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:12,558 INFO L225 Difference]: With dead ends: 4686 [2021-06-05 23:42:12,558 INFO L226 Difference]: Without dead ends: 4661 [2021-06-05 23:42:12,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 2337.4ms TimeCoverageRelationStatistics Valid=630, Invalid=3926, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:42:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-05 23:42:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 2998. [2021-06-05 23:42:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.302635969302636) internal successors, (9898), 2997 states have internal predecessors, (9898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 9898 transitions. [2021-06-05 23:42:12,602 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 9898 transitions. Word has length 30 [2021-06-05 23:42:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:12,602 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 9898 transitions. [2021-06-05 23:42:12,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 9898 transitions. [2021-06-05 23:42:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:12,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:12,605 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:12,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:12,806 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:12,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:12,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1536694523, now seen corresponding path program 27 times [2021-06-05 23:42:12,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:12,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717825572] [2021-06-05 23:42:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:13,139 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 23:42:13,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:13,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717825572] [2021-06-05 23:42:13,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717825572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:13,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435051955] [2021-06-05 23:42:13,140 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 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 23:42:13,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:42:13,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:13,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:42:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:13,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:13,400 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-06-05 23:42:13,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:42:13,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:13,483 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-06-05 23:42:13,484 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 77 [2021-06-05 23:42:13,511 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,533 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:42:13,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2021-06-05 23:42:13,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:42:13,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:13,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:13,609 INFO L628 ElimStorePlain]: treesize reduction 15, result has 81.3 percent of original size [2021-06-05 23:42:13,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,646 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:44, output treesize:106 [2021-06-05 23:42:13,907 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 23:42:13,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435051955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:13,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:13,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:42:13,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427039089] [2021-06-05 23:42:13,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:42:13,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:13,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:42:13,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:42:13,909 INFO L87 Difference]: Start difference. First operand 2998 states and 9898 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:16,209 INFO L93 Difference]: Finished difference Result 3945 states and 12720 transitions. [2021-06-05 23:42:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:42:16,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:16,214 INFO L225 Difference]: With dead ends: 3945 [2021-06-05 23:42:16,215 INFO L226 Difference]: Without dead ends: 3930 [2021-06-05 23:42:16,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 2170.3ms TimeCoverageRelationStatistics Valid=365, Invalid=2287, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:42:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2021-06-05 23:42:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 2990. [2021-06-05 23:42:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 3.3044496487119437) internal successors, (9877), 2989 states have internal predecessors, (9877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 9877 transitions. [2021-06-05 23:42:16,253 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 9877 transitions. Word has length 30 [2021-06-05 23:42:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:16,253 INFO L482 AbstractCegarLoop]: Abstraction has 2990 states and 9877 transitions. [2021-06-05 23:42:16,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 9877 transitions. [2021-06-05 23:42:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:16,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:16,257 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:16,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 23:42:16,459 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:16,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1672377245, now seen corresponding path program 28 times [2021-06-05 23:42:16,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:16,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916336807] [2021-06-05 23:42:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:16,828 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 23:42:16,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:16,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916336807] [2021-06-05 23:42:16,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916336807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:16,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440925856] [2021-06-05 23:42:16,829 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 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 23:42:16,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:16,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:16,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:42:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:17,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:17,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:17,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:42:17,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:17,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:17,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:17,161 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:42:17,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:17,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:17,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:17,168 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:42:17,189 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 23:42:17,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440925856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:17,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:17,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:42:17,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290723602] [2021-06-05 23:42:17,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:42:17,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:42:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:42:17,190 INFO L87 Difference]: Start difference. First operand 2990 states and 9877 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:19,166 INFO L93 Difference]: Finished difference Result 4132 states and 13335 transitions. [2021-06-05 23:42:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:42:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:19,172 INFO L225 Difference]: With dead ends: 4132 [2021-06-05 23:42:19,172 INFO L226 Difference]: Without dead ends: 4113 [2021-06-05 23:42:19,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1775.3ms TimeCoverageRelationStatistics Valid=324, Invalid=2126, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:42:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-06-05 23:42:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3032. [2021-06-05 23:42:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.3068294292312768) internal successors, (10023), 3031 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 10023 transitions. [2021-06-05 23:42:19,213 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 10023 transitions. Word has length 30 [2021-06-05 23:42:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:19,214 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 10023 transitions. [2021-06-05 23:42:19,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 10023 transitions. [2021-06-05 23:42:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:19,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:19,217 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:19,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 23:42:19,417 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:19,418 INFO L82 PathProgramCache]: Analyzing trace with hash 393939261, now seen corresponding path program 29 times [2021-06-05 23:42:19,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:19,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141840242] [2021-06-05 23:42:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:19,782 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 23:42:19,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:19,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141840242] [2021-06-05 23:42:19,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141840242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:19,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416216416] [2021-06-05 23:42:19,783 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 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 23:42:19,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:42:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:19,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:42:19,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:20,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:20,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:20,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:42:20,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:20,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:20,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:20,116 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:42:20,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:20,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:20,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:20,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:42:20,141 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 23:42:20,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416216416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:20,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:20,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:42:20,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929259791] [2021-06-05 23:42:20,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:42:20,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:20,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:42:20,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:42:20,142 INFO L87 Difference]: Start difference. First operand 3032 states and 10023 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:22,095 INFO L93 Difference]: Finished difference Result 3909 states and 12666 transitions. [2021-06-05 23:42:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:42:22,095 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:22,100 INFO L225 Difference]: With dead ends: 3909 [2021-06-05 23:42:22,100 INFO L226 Difference]: Without dead ends: 3894 [2021-06-05 23:42:22,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1794.8ms TimeCoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:42:22,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-06-05 23:42:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3035. [2021-06-05 23:42:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 3034 states have (on average 3.308503625576796) internal successors, (10038), 3034 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 23:42:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 10038 transitions. [2021-06-05 23:42:22,137 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 10038 transitions. Word has length 30 [2021-06-05 23:42:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:22,137 INFO L482 AbstractCegarLoop]: Abstraction has 3035 states and 10038 transitions. [2021-06-05 23:42:22,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 10038 transitions. [2021-06-05 23:42:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:22,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:22,140 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:22,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 23:42:22,340 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:22,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1883675371, now seen corresponding path program 30 times [2021-06-05 23:42:22,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:22,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095727808] [2021-06-05 23:42:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:22,728 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 23:42:22,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:22,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095727808] [2021-06-05 23:42:22,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095727808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:22,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252386447] [2021-06-05 23:42:22,729 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 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 23:42:22,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:42:22,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:22,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:42:22,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:22,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:22,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:22,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:42:22,934 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:22,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:22,943 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:42:22,944 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:22,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:22,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:22,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:19 [2021-06-05 23:42:23,016 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 23:42:23,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252386447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:23,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:23,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:42:23,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486439739] [2021-06-05 23:42:23,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:42:23,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:23,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:42:23,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:42:23,018 INFO L87 Difference]: Start difference. First operand 3035 states and 10038 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:24,915 INFO L93 Difference]: Finished difference Result 4285 states and 13847 transitions. [2021-06-05 23:42:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:42:24,915 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:24,921 INFO L225 Difference]: With dead ends: 4285 [2021-06-05 23:42:24,921 INFO L226 Difference]: Without dead ends: 4270 [2021-06-05 23:42:24,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1674.1ms TimeCoverageRelationStatistics Valid=519, Invalid=2343, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:42:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2021-06-05 23:42:24,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 3026. [2021-06-05 23:42:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 3.3054545454545456) internal successors, (9999), 3025 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 9999 transitions. [2021-06-05 23:42:24,966 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 9999 transitions. Word has length 30 [2021-06-05 23:42:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:24,966 INFO L482 AbstractCegarLoop]: Abstraction has 3026 states and 9999 transitions. [2021-06-05 23:42:24,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 9999 transitions. [2021-06-05 23:42:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:24,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:24,970 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:25,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:25,170 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:25,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1031405705, now seen corresponding path program 31 times [2021-06-05 23:42:25,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:25,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443500339] [2021-06-05 23:42:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:25,583 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 23:42:25,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443500339] [2021-06-05 23:42:25,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443500339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896221726] [2021-06-05 23:42:25,584 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 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 23:42:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:25,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:42:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:25,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:25,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:25,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:42:25,808 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:25,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:25,816 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:42:25,817 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:25,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:25,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:25,823 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 23:42:25,866 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 23:42:25,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896221726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:25,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:25,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:42:25,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680413897] [2021-06-05 23:42:25,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:42:25,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:25,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:42:25,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:42:25,867 INFO L87 Difference]: Start difference. First operand 3026 states and 9999 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:27,859 INFO L93 Difference]: Finished difference Result 4471 states and 14415 transitions. [2021-06-05 23:42:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:42:27,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:27,865 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 23:42:27,865 INFO L226 Difference]: Without dead ends: 4431 [2021-06-05 23:42:27,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1618.5ms TimeCoverageRelationStatistics Valid=320, Invalid=2542, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:42:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-06-05 23:42:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 2993. [2021-06-05 23:42:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 3.304144385026738) internal successors, (9886), 2992 states have internal predecessors, (9886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 9886 transitions. [2021-06-05 23:42:27,907 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 9886 transitions. Word has length 30 [2021-06-05 23:42:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:27,907 INFO L482 AbstractCegarLoop]: Abstraction has 2993 states and 9886 transitions. [2021-06-05 23:42:27,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 9886 transitions. [2021-06-05 23:42:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:27,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:27,910 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:28,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 23:42:28,111 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:28,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:28,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1015867873, now seen corresponding path program 32 times [2021-06-05 23:42:28,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:28,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159702008] [2021-06-05 23:42:28,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:28,490 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 23:42:28,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:28,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159702008] [2021-06-05 23:42:28,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159702008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:28,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915833996] [2021-06-05 23:42:28,491 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 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 23:42:28,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:28,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:28,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:42:28,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:28,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:28,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:28,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:28,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:42:28,700 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:28,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:28,708 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:42:28,714 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:28,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:28,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:28,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:42:28,812 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 23:42:28,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915833996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:28,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:28,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:42:28,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671519728] [2021-06-05 23:42:28,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:42:28,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:28,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:42:28,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:42:28,814 INFO L87 Difference]: Start difference. First operand 2993 states and 9886 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:30,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:30,552 INFO L93 Difference]: Finished difference Result 4503 states and 14629 transitions. [2021-06-05 23:42:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:42:30,553 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:30,559 INFO L225 Difference]: With dead ends: 4503 [2021-06-05 23:42:30,559 INFO L226 Difference]: Without dead ends: 4478 [2021-06-05 23:42:30,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1641.0ms TimeCoverageRelationStatistics Valid=393, Invalid=2363, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:42:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2021-06-05 23:42:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 2984. [2021-06-05 23:42:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 3.3040563191418038) internal successors, (9856), 2983 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 9856 transitions. [2021-06-05 23:42:30,617 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 9856 transitions. Word has length 30 [2021-06-05 23:42:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:30,617 INFO L482 AbstractCegarLoop]: Abstraction has 2984 states and 9856 transitions. [2021-06-05 23:42:30,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 9856 transitions. [2021-06-05 23:42:30,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:30,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:30,621 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:30,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:30,822 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash -193034087, now seen corresponding path program 33 times [2021-06-05 23:42:30,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:30,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882523068] [2021-06-05 23:42:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:31,162 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 23:42:31,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:31,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882523068] [2021-06-05 23:42:31,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882523068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:31,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222684219] [2021-06-05 23:42:31,162 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 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 23:42:31,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:42:31,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:31,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:42:31,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:31,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:31,420 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-06-05 23:42:31,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:42:31,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:31,483 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-06-05 23:42:31,483 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 69 [2021-06-05 23:42:31,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:31,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:31,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 23:42:31,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:31,601 INFO L628 ElimStorePlain]: treesize reduction 94, result has 39.0 percent of original size [2021-06-05 23:42:31,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:31,618 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:44, output treesize:157 [2021-06-05 23:42:31,859 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 23:42:31,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222684219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:31,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:31,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:42:31,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225307944] [2021-06-05 23:42:31,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:42:31,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:31,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:42:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:42:31,860 INFO L87 Difference]: Start difference. First operand 2984 states and 9856 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:33,986 INFO L93 Difference]: Finished difference Result 4011 states and 12958 transitions. [2021-06-05 23:42:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:42:33,989 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:33,995 INFO L225 Difference]: With dead ends: 4011 [2021-06-05 23:42:33,995 INFO L226 Difference]: Without dead ends: 3990 [2021-06-05 23:42:33,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2139.7ms TimeCoverageRelationStatistics Valid=377, Invalid=2173, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:42:34,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2021-06-05 23:42:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 3047. [2021-06-05 23:42:34,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 3046 states have (on average 3.30564674983585) internal successors, (10069), 3046 states have internal predecessors, (10069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 10069 transitions. [2021-06-05 23:42:34,042 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 10069 transitions. Word has length 30 [2021-06-05 23:42:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:34,042 INFO L482 AbstractCegarLoop]: Abstraction has 3047 states and 10069 transitions. [2021-06-05 23:42:34,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 10069 transitions. [2021-06-05 23:42:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:34,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:34,046 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:34,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:34,247 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:34,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1946936483, now seen corresponding path program 34 times [2021-06-05 23:42:34,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:34,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809926750] [2021-06-05 23:42:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:34,665 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 23:42:34,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:34,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809926750] [2021-06-05 23:42:34,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809926750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:34,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802320404] [2021-06-05 23:42:34,666 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 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 23:42:34,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:34,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:34,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:42:34,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:34,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:34,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:34,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 23:42:34,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:34,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:34,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:34,956 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-06-05 23:42:34,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:34,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:34,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:34,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-06-05 23:42:34,985 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 23:42:34,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802320404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:34,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:34,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 23:42:34,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852092331] [2021-06-05 23:42:34,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:42:34,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:42:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:42:34,986 INFO L87 Difference]: Start difference. First operand 3047 states and 10069 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:35,689 INFO L93 Difference]: Finished difference Result 3982 states and 12966 transitions. [2021-06-05 23:42:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:42:35,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:35,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:35,695 INFO L225 Difference]: With dead ends: 3982 [2021-06-05 23:42:35,695 INFO L226 Difference]: Without dead ends: 3963 [2021-06-05 23:42:35,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 838.1ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2021-06-05 23:42:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3065. [2021-06-05 23:42:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 3.3097258485639687) internal successors, (10141), 3064 states have internal predecessors, (10141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 10141 transitions. [2021-06-05 23:42:35,733 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 10141 transitions. Word has length 30 [2021-06-05 23:42:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:35,733 INFO L482 AbstractCegarLoop]: Abstraction has 3065 states and 10141 transitions. [2021-06-05 23:42:35,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 10141 transitions. [2021-06-05 23:42:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:35,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:35,736 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:35,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 23:42:35,937 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash 212164707, now seen corresponding path program 35 times [2021-06-05 23:42:35,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:35,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309944555] [2021-06-05 23:42:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:36,241 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 23:42:36,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:36,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309944555] [2021-06-05 23:42:36,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309944555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:36,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887587929] [2021-06-05 23:42:36,241 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 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 23:42:36,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:42:36,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:36,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:42:36,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:36,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:42:36,493 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:36,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:36,502 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:42:36,504 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:36,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:36,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:36,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:19 [2021-06-05 23:42:36,565 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 23:42:36,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887587929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:36,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:36,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:42:36,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298828823] [2021-06-05 23:42:36,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:42:36,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:36,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:42:36,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:42:36,566 INFO L87 Difference]: Start difference. First operand 3065 states and 10141 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 23:42:38,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:38,837 INFO L93 Difference]: Finished difference Result 4575 states and 14661 transitions. [2021-06-05 23:42:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:42:38,837 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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) Word has length 30 [2021-06-05 23:42:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:38,844 INFO L225 Difference]: With dead ends: 4575 [2021-06-05 23:42:38,844 INFO L226 Difference]: Without dead ends: 4545 [2021-06-05 23:42:38,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1894.3ms TimeCoverageRelationStatistics Valid=525, Invalid=3015, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:42:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2021-06-05 23:42:38,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 3060. [2021-06-05 23:42:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 3059 states have (on average 3.307289964040536) internal successors, (10117), 3059 states have internal predecessors, (10117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 10117 transitions. [2021-06-05 23:42:38,906 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 10117 transitions. Word has length 30 [2021-06-05 23:42:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:38,906 INFO L482 AbstractCegarLoop]: Abstraction has 3060 states and 10117 transitions. [2021-06-05 23:42:38,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 23:42:38,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 10117 transitions. [2021-06-05 23:42:38,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:38,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:38,910 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:39,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:39,111 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1288330631, now seen corresponding path program 36 times [2021-06-05 23:42:39,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:39,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327218944] [2021-06-05 23:42:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:39,542 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 23:42:39,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:39,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327218944] [2021-06-05 23:42:39,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327218944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:39,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243406035] [2021-06-05 23:42:39,542 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 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 23:42:39,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:42:39,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:39,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:42:39,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:39,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:39,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:39,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:42:39,751 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:39,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:39,762 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:42:39,763 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:39,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:39,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:39,773 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:19 [2021-06-05 23:42:39,817 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 23:42:39,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243406035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:39,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:39,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:42:39,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196909527] [2021-06-05 23:42:39,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:42:39,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:39,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:42:39,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:42:39,818 INFO L87 Difference]: Start difference. First operand 3060 states and 10117 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:41,177 INFO L93 Difference]: Finished difference Result 4599 states and 14829 transitions. [2021-06-05 23:42:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:42:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:41,184 INFO L225 Difference]: With dead ends: 4599 [2021-06-05 23:42:41,184 INFO L226 Difference]: Without dead ends: 4574 [2021-06-05 23:42:41,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1215.7ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:42:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4574 states. [2021-06-05 23:42:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4574 to 3075. [2021-06-05 23:42:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 3074 states have (on average 3.3038386467143788) internal successors, (10156), 3074 states have internal predecessors, (10156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 10156 transitions. [2021-06-05 23:42:41,229 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 10156 transitions. Word has length 30 [2021-06-05 23:42:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:41,229 INFO L482 AbstractCegarLoop]: Abstraction has 3075 states and 10156 transitions. [2021-06-05 23:42:41,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 10156 transitions. [2021-06-05 23:42:41,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:41,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:41,233 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:41,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:41,434 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:41,434 INFO L82 PathProgramCache]: Analyzing trace with hash 573262473, now seen corresponding path program 37 times [2021-06-05 23:42:41,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:41,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795733130] [2021-06-05 23:42:41,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:41,816 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 23:42:41,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:41,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795733130] [2021-06-05 23:42:41,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795733130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:41,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948916235] [2021-06-05 23:42:41,816 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 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 23:42:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:41,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:42:41,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:42,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:42,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:42:42,044 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:42,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:42,051 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:42:42,053 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:42,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:42,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:42,059 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 23:42:42,114 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 23:42:42,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948916235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:42,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:42,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:42:42,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042722594] [2021-06-05 23:42:42,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:42:42,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:42,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:42:42,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:42:42,115 INFO L87 Difference]: Start difference. First operand 3075 states and 10156 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:44,039 INFO L93 Difference]: Finished difference Result 4801 states and 15457 transitions. [2021-06-05 23:42:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:42:44,039 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:44,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:44,045 INFO L225 Difference]: With dead ends: 4801 [2021-06-05 23:42:44,046 INFO L226 Difference]: Without dead ends: 4751 [2021-06-05 23:42:44,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1638.7ms TimeCoverageRelationStatistics Valid=467, Invalid=2955, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:42:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-06-05 23:42:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3059. [2021-06-05 23:42:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.3044473512099413) internal successors, (10105), 3058 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 10105 transitions. [2021-06-05 23:42:44,089 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 10105 transitions. Word has length 30 [2021-06-05 23:42:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:44,090 INFO L482 AbstractCegarLoop]: Abstraction has 3059 states and 10105 transitions. [2021-06-05 23:42:44,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 10105 transitions. [2021-06-05 23:42:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:44,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:44,093 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:44,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 23:42:44,293 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:44,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:44,294 INFO L82 PathProgramCache]: Analyzing trace with hash 376813411, now seen corresponding path program 38 times [2021-06-05 23:42:44,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:44,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175348934] [2021-06-05 23:42:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:44,646 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 23:42:44,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175348934] [2021-06-05 23:42:44,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175348934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94484176] [2021-06-05 23:42:44,646 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 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 23:42:44,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:44,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:42:44,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:44,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:44,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:44,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 23:42:44,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:44,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:44,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:44,909 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-06-05 23:42:44,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:44,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:44,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:44,916 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-06-05 23:42:44,941 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 23:42:44,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94484176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:44,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:44,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 23:42:44,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141128022] [2021-06-05 23:42:44,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:42:44,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:44,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:42:44,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:42:44,943 INFO L87 Difference]: Start difference. First operand 3059 states and 10105 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:45,583 INFO L93 Difference]: Finished difference Result 3240 states and 10594 transitions. [2021-06-05 23:42:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:42:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:45,588 INFO L225 Difference]: With dead ends: 3240 [2021-06-05 23:42:45,588 INFO L226 Difference]: Without dead ends: 3221 [2021-06-05 23:42:45,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:42:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2021-06-05 23:42:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 3067. [2021-06-05 23:42:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 3066 states have (on average 3.3036529680365296) internal successors, (10129), 3066 states have internal predecessors, (10129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 10129 transitions. [2021-06-05 23:42:45,623 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 10129 transitions. Word has length 30 [2021-06-05 23:42:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:45,623 INFO L482 AbstractCegarLoop]: Abstraction has 3067 states and 10129 transitions. [2021-06-05 23:42:45,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:45,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 10129 transitions. [2021-06-05 23:42:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:45,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:45,626 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:45,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 23:42:45,827 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2119150557, now seen corresponding path program 39 times [2021-06-05 23:42:45,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:45,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016811360] [2021-06-05 23:42:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:46,158 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 23:42:46,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:46,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016811360] [2021-06-05 23:42:46,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016811360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:46,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562781336] [2021-06-05 23:42:46,159 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 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 23:42:46,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:42:46,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:46,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:42:46,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:46,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:46,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:42:46,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:42:46,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:46,432 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:42:46,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:42:46,434 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:46,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:42:46,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:46,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:46,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:46,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:46,472 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:47, output treesize:108 [2021-06-05 23:42:46,638 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 23:42:46,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562781336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:46,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:46,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 23:42:46,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562450476] [2021-06-05 23:42:46,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:42:46,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:46,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:42:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:42:46,639 INFO L87 Difference]: Start difference. First operand 3067 states and 10129 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:48,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:48,302 INFO L93 Difference]: Finished difference Result 4572 states and 14766 transitions. [2021-06-05 23:42:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:42:48,302 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:48,309 INFO L225 Difference]: With dead ends: 4572 [2021-06-05 23:42:48,309 INFO L226 Difference]: Without dead ends: 4522 [2021-06-05 23:42:48,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1590.7ms TimeCoverageRelationStatistics Valid=400, Invalid=2150, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:42:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2021-06-05 23:42:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 3115. [2021-06-05 23:42:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3115 states, 3114 states have (on average 3.3015414258188827) internal successors, (10281), 3114 states have internal predecessors, (10281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 10281 transitions. [2021-06-05 23:42:48,353 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 10281 transitions. Word has length 30 [2021-06-05 23:42:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:48,353 INFO L482 AbstractCegarLoop]: Abstraction has 3115 states and 10281 transitions. [2021-06-05 23:42:48,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 10281 transitions. [2021-06-05 23:42:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:48,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:48,357 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:48,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 23:42:48,558 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:48,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2080956643, now seen corresponding path program 40 times [2021-06-05 23:42:48,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:48,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280306141] [2021-06-05 23:42:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:48,867 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 23:42:48,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:48,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280306141] [2021-06-05 23:42:48,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280306141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:48,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788134043] [2021-06-05 23:42:48,867 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 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 23:42:48,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:48,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:48,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:42:48,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:49,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:49,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:49,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:49,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:42:49,051 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:49,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:49,059 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:42:49,060 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:49,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:49,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:49,067 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:42:49,143 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 23:42:49,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788134043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:49,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:49,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:42:49,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263162713] [2021-06-05 23:42:49,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:42:49,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:42:49,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:42:49,144 INFO L87 Difference]: Start difference. First operand 3115 states and 10281 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:50,729 INFO L93 Difference]: Finished difference Result 4308 states and 13998 transitions. [2021-06-05 23:42:50,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:42:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:50,735 INFO L225 Difference]: With dead ends: 4308 [2021-06-05 23:42:50,735 INFO L226 Difference]: Without dead ends: 4283 [2021-06-05 23:42:50,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1286.9ms TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:42:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2021-06-05 23:42:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 3123. [2021-06-05 23:42:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 3.300768737988469) internal successors, (10305), 3122 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 10305 transitions. [2021-06-05 23:42:50,780 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 10305 transitions. Word has length 30 [2021-06-05 23:42:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:50,780 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 10305 transitions. [2021-06-05 23:42:50,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 10305 transitions. [2021-06-05 23:42:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:50,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:50,784 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:50,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:50,985 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash 430688207, now seen corresponding path program 41 times [2021-06-05 23:42:50,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:50,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720402838] [2021-06-05 23:42:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:51,226 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-06-05 23:42:51,437 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 23:42:51,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:51,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720402838] [2021-06-05 23:42:51,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720402838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:51,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532039507] [2021-06-05 23:42:51,438 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 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 23:42:51,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:42:51,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:51,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:42:51,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:51,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:51,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:51,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:42:51,668 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:51,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:51,677 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:42:51,681 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:51,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:51,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:51,694 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:28 [2021-06-05 23:42:51,777 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 23:42:51,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532039507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:51,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:51,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:42:51,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610737863] [2021-06-05 23:42:51,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:42:51,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:51,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:42:51,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:42:51,778 INFO L87 Difference]: Start difference. First operand 3123 states and 10305 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:53,194 INFO L93 Difference]: Finished difference Result 4342 states and 14111 transitions. [2021-06-05 23:42:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:42:53,194 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:53,200 INFO L225 Difference]: With dead ends: 4342 [2021-06-05 23:42:53,200 INFO L226 Difference]: Without dead ends: 4317 [2021-06-05 23:42:53,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1295.9ms TimeCoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:42:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4317 states. [2021-06-05 23:42:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4317 to 3123. [2021-06-05 23:42:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 3.300768737988469) internal successors, (10305), 3122 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 10305 transitions. [2021-06-05 23:42:53,255 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 10305 transitions. Word has length 30 [2021-06-05 23:42:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:53,255 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 10305 transitions. [2021-06-05 23:42:53,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 10305 transitions. [2021-06-05 23:42:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:53,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:53,260 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:53,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 23:42:53,469 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:53,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1714994824, now seen corresponding path program 44 times [2021-06-05 23:42:53,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:53,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21139259] [2021-06-05 23:42:53,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:53,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:53,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21139259] [2021-06-05 23:42:53,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21139259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:53,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740414621] [2021-06-05 23:42:53,830 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 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 23:42:53,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:53,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:42:53,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:54,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:54,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:54,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:54,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:42:54,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:54,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:54,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:54,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:54,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:54,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:42:54,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:54,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:54,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:54,085 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:42:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:54,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740414621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:54,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:54,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 23:42:54,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684008929] [2021-06-05 23:42:54,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:42:54,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:54,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:42:54,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:42:54,108 INFO L87 Difference]: Start difference. First operand 3123 states and 10305 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:56,397 INFO L93 Difference]: Finished difference Result 4115 states and 13183 transitions. [2021-06-05 23:42:56,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:42:56,397 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:56,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:56,403 INFO L225 Difference]: With dead ends: 4115 [2021-06-05 23:42:56,403 INFO L226 Difference]: Without dead ends: 4089 [2021-06-05 23:42:56,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 2067.6ms TimeCoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:42:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-05 23:42:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3117. [2021-06-05 23:42:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 3.302310654685494) internal successors, (10290), 3116 states have internal predecessors, (10290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 10290 transitions. [2021-06-05 23:42:56,442 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 10290 transitions. Word has length 30 [2021-06-05 23:42:56,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:56,442 INFO L482 AbstractCegarLoop]: Abstraction has 3117 states and 10290 transitions. [2021-06-05 23:42:56,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 10290 transitions. [2021-06-05 23:42:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:56,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:56,446 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:56,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 23:42:56,646 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1537954798, now seen corresponding path program 45 times [2021-06-05 23:42:56,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:56,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844160780] [2021-06-05 23:42:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:57,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:57,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844160780] [2021-06-05 23:42:57,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844160780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:57,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898118656] [2021-06-05 23:42:57,058 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 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 23:42:57,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:42:57,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:42:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:57,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:57,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:57,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 23:42:57,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:42:57,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:57,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:57,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:57,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:42:57,478 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:57,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:57,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:57,489 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:18 [2021-06-05 23:42:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:57,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898118656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:57,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:57,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:42:57,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148610944] [2021-06-05 23:42:57,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:42:57,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:57,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:42:57,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:42:57,582 INFO L87 Difference]: Start difference. First operand 3117 states and 10290 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:59,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:59,889 INFO L93 Difference]: Finished difference Result 4293 states and 13720 transitions. [2021-06-05 23:42:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:42:59,889 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:59,894 INFO L225 Difference]: With dead ends: 4293 [2021-06-05 23:42:59,895 INFO L226 Difference]: Without dead ends: 4252 [2021-06-05 23:42:59,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 2144.4ms TimeCoverageRelationStatistics Valid=499, Invalid=4193, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:42:59,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-06-05 23:42:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 3157. [2021-06-05 23:42:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.2978453738910014) internal successors, (10408), 3156 states have internal predecessors, (10408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 10408 transitions. [2021-06-05 23:42:59,935 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 10408 transitions. Word has length 30 [2021-06-05 23:42:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:59,935 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 10408 transitions. [2021-06-05 23:42:59,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 10408 transitions. [2021-06-05 23:42:59,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:59,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:59,939 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:00,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 23:43:00,148 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:00,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1575717380, now seen corresponding path program 46 times [2021-06-05 23:43:00,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:00,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971445817] [2021-06-05 23:43:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:00,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:00,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971445817] [2021-06-05 23:43:00,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971445817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:00,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142945146] [2021-06-05 23:43:00,477 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 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 23:43:00,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:43:00,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:00,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:43:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:00,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:00,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:00,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:00,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:00,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:43:00,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:00,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:00,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:00,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:00,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:00,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:00,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:43:00,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:00,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:00,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:00,707 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:43:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:00,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142945146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:00,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:00,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 23:43:00,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718372279] [2021-06-05 23:43:00,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:43:00,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:00,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:43:00,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:43:00,729 INFO L87 Difference]: Start difference. First operand 3157 states and 10408 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:03,505 INFO L93 Difference]: Finished difference Result 4331 states and 13983 transitions. [2021-06-05 23:43:03,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:43:03,505 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:03,511 INFO L225 Difference]: With dead ends: 4331 [2021-06-05 23:43:03,511 INFO L226 Difference]: Without dead ends: 4305 [2021-06-05 23:43:03,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 2404.5ms TimeCoverageRelationStatistics Valid=677, Invalid=4435, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:43:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-05 23:43:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3177. [2021-06-05 23:43:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 3.292821158690176) internal successors, (10458), 3176 states have internal predecessors, (10458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 10458 transitions. [2021-06-05 23:43:03,576 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 10458 transitions. Word has length 30 [2021-06-05 23:43:03,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:03,577 INFO L482 AbstractCegarLoop]: Abstraction has 3177 states and 10458 transitions. [2021-06-05 23:43:03,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:03,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 10458 transitions. [2021-06-05 23:43:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:03,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:03,580 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:03,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 23:43:03,781 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1144533930, now seen corresponding path program 47 times [2021-06-05 23:43:03,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:03,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193448537] [2021-06-05 23:43:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:04,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:04,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193448537] [2021-06-05 23:43:04,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193448537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:04,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774461381] [2021-06-05 23:43:04,110 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 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 23:43:04,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:43:04,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:04,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:43:04,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:04,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:04,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:04,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:04,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:04,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:43:04,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:04,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:04,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:04,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:04,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:04,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:04,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:43:04,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:04,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:04,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:04,362 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:43:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:04,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774461381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:04,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:04,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 23:43:04,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365806501] [2021-06-05 23:43:04,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:43:04,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:04,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:43:04,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:43:04,387 INFO L87 Difference]: Start difference. First operand 3177 states and 10458 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:06,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:06,460 INFO L93 Difference]: Finished difference Result 4149 states and 13320 transitions. [2021-06-05 23:43:06,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:43:06,460 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:06,466 INFO L225 Difference]: With dead ends: 4149 [2021-06-05 23:43:06,466 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 23:43:06,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1844.4ms TimeCoverageRelationStatistics Valid=430, Invalid=2876, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:43:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 23:43:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3215. [2021-06-05 23:43:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3215 states, 3214 states have (on average 3.285314250155569) internal successors, (10559), 3214 states have internal predecessors, (10559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 10559 transitions. [2021-06-05 23:43:06,510 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 10559 transitions. Word has length 30 [2021-06-05 23:43:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:06,510 INFO L482 AbstractCegarLoop]: Abstraction has 3215 states and 10559 transitions. [2021-06-05 23:43:06,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 10559 transitions. [2021-06-05 23:43:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:06,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:06,514 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:06,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:06,714 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:06,714 INFO L82 PathProgramCache]: Analyzing trace with hash 310686425, now seen corresponding path program 42 times [2021-06-05 23:43:06,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:06,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033101310] [2021-06-05 23:43:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:07,055 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 23:43:07,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:07,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033101310] [2021-06-05 23:43:07,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033101310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:07,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572767220] [2021-06-05 23:43:07,055 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 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 23:43:07,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:43:07,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:07,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:43:07,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:07,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:07,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:07,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-06-05 23:43:07,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:07,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:07,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:07,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:43:07,339 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:43:07,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:07,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:07,359 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:43:07,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 29 [2021-06-05 23:43:07,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:07,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:07,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:07,405 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:128 [2021-06-05 23:43:07,661 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 23:43:07,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572767220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:07,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:07,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:43:07,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488438206] [2021-06-05 23:43:07,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:43:07,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:07,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:43:07,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:43:07,663 INFO L87 Difference]: Start difference. First operand 3215 states and 10559 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:08,580 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 23:43:09,472 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-05 23:43:09,642 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-06-05 23:43:09,874 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 23:43:11,494 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2021-06-05 23:43:12,039 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-06-05 23:43:12,313 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-05 23:43:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:13,731 INFO L93 Difference]: Finished difference Result 5183 states and 16274 transitions. [2021-06-05 23:43:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:43:13,732 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:13,738 INFO L225 Difference]: With dead ends: 5183 [2021-06-05 23:43:13,738 INFO L226 Difference]: Without dead ends: 5149 [2021-06-05 23:43:13,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 5297.3ms TimeCoverageRelationStatistics Valid=1113, Invalid=6027, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 23:43:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2021-06-05 23:43:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 3249. [2021-06-05 23:43:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3249 states, 3248 states have (on average 3.291564039408867) internal successors, (10691), 3248 states have internal predecessors, (10691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 10691 transitions. [2021-06-05 23:43:13,785 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 10691 transitions. Word has length 30 [2021-06-05 23:43:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:13,785 INFO L482 AbstractCegarLoop]: Abstraction has 3249 states and 10691 transitions. [2021-06-05 23:43:13,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 10691 transitions. [2021-06-05 23:43:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:13,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:13,789 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:13,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:13,990 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:13,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:13,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1576808167, now seen corresponding path program 43 times [2021-06-05 23:43:13,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:13,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75810919] [2021-06-05 23:43:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:14,319 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 23:43:14,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:14,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75810919] [2021-06-05 23:43:14,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75810919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:14,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084489285] [2021-06-05 23:43:14,319 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 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 23:43:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:14,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:14,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:14,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:14,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:43:14,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:14,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:14,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:14,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:14,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2021-06-05 23:43:14,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:14,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:14,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:14,565 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:10 [2021-06-05 23:43:14,595 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 23:43:14,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084489285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:14,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:14,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:43:14,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99801502] [2021-06-05 23:43:14,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:14,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:14,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:14,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:14,596 INFO L87 Difference]: Start difference. First operand 3249 states and 10691 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 23:43:17,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:17,295 INFO L93 Difference]: Finished difference Result 4669 states and 14856 transitions. [2021-06-05 23:43:17,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:43:17,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) Word has length 30 [2021-06-05 23:43:17,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:17,301 INFO L225 Difference]: With dead ends: 4669 [2021-06-05 23:43:17,301 INFO L226 Difference]: Without dead ends: 4654 [2021-06-05 23:43:17,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 2378.6ms TimeCoverageRelationStatistics Valid=657, Invalid=3003, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:43:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-06-05 23:43:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 3262. [2021-06-05 23:43:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 3.2934682612695494) internal successors, (10740), 3261 states have internal predecessors, (10740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 10740 transitions. [2021-06-05 23:43:17,345 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 10740 transitions. Word has length 30 [2021-06-05 23:43:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:17,345 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 10740 transitions. [2021-06-05 23:43:17,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 23:43:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 10740 transitions. [2021-06-05 23:43:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:17,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:17,350 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:17,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 23:43:17,551 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash 228739969, now seen corresponding path program 44 times [2021-06-05 23:43:17,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:17,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159729185] [2021-06-05 23:43:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:17,915 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 23:43:17,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:17,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159729185] [2021-06-05 23:43:17,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159729185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:17,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24328092] [2021-06-05 23:43:17,915 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 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 23:43:17,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:43:17,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:17,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:17,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:18,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:18,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:43:18,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:18,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:18,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:18,173 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:43:18,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2021-06-05 23:43:18,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:18,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:43:18,178 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:43:18,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:18,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:18,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:18,202 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:116 [2021-06-05 23:43:18,355 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 23:43:18,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24328092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:18,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:18,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:43:18,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022406947] [2021-06-05 23:43:18,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:43:18,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:43:18,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:43:18,356 INFO L87 Difference]: Start difference. First operand 3262 states and 10740 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:19,186 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 23:43:20,161 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-05 23:43:20,322 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 23:43:21,992 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-06-05 23:43:23,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:23,898 INFO L93 Difference]: Finished difference Result 5921 states and 18485 transitions. [2021-06-05 23:43:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:43:23,899 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:23,907 INFO L225 Difference]: With dead ends: 5921 [2021-06-05 23:43:23,907 INFO L226 Difference]: Without dead ends: 5862 [2021-06-05 23:43:23,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3439 ImplicationChecksByTransitivity, 5138.9ms TimeCoverageRelationStatistics Valid=1475, Invalid=8031, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 23:43:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-06-05 23:43:23,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 3256. [2021-06-05 23:43:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 3255 states have (on average 3.29247311827957) internal successors, (10717), 3255 states have internal predecessors, (10717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 10717 transitions. [2021-06-05 23:43:23,977 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 10717 transitions. Word has length 30 [2021-06-05 23:43:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:23,977 INFO L482 AbstractCegarLoop]: Abstraction has 3256 states and 10717 transitions. [2021-06-05 23:43:23,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 10717 transitions. [2021-06-05 23:43:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:23,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:23,981 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:24,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 23:43:24,182 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash 253193420, now seen corresponding path program 48 times [2021-06-05 23:43:24,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:24,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191164309] [2021-06-05 23:43:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:24,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:24,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191164309] [2021-06-05 23:43:24,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191164309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:24,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936049344] [2021-06-05 23:43:24,567 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 23:43:24,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:43:24,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:43:24,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:24,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:24,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:24,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:24,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:24,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:43:24,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:24,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:24,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:24,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:24,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:24,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:24,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:43:24,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:24,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:24,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:24,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:43:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:24,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936049344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:24,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:24,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:43:24,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717762002] [2021-06-05 23:43:24,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:24,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:24,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:24,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:24,837 INFO L87 Difference]: Start difference. First operand 3256 states and 10717 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:29,312 INFO L93 Difference]: Finished difference Result 4767 states and 15097 transitions. [2021-06-05 23:43:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:43:29,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:29,319 INFO L225 Difference]: With dead ends: 4767 [2021-06-05 23:43:29,319 INFO L226 Difference]: Without dead ends: 4738 [2021-06-05 23:43:29,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3084 ImplicationChecksByTransitivity, 3886.4ms TimeCoverageRelationStatistics Valid=1272, Invalid=7658, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 23:43:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2021-06-05 23:43:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 3267. [2021-06-05 23:43:29,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 3266 states have (on average 3.2966932026944273) internal successors, (10767), 3266 states have internal predecessors, (10767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 10767 transitions. [2021-06-05 23:43:29,366 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 10767 transitions. Word has length 30 [2021-06-05 23:43:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:29,366 INFO L482 AbstractCegarLoop]: Abstraction has 3267 states and 10767 transitions. [2021-06-05 23:43:29,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 10767 transitions. [2021-06-05 23:43:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:29,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:29,370 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:29,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:29,571 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:29,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1045638576, now seen corresponding path program 49 times [2021-06-05 23:43:29,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:29,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143197225] [2021-06-05 23:43:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:29,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:29,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143197225] [2021-06-05 23:43:29,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143197225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:29,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496128789] [2021-06-05 23:43:29,909 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 23:43:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:43:29,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:30,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:30,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:30,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:30,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:30,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:43:30,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:30,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:30,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:30,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:30,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:43:30,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:30,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:30,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:30,191 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:43:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:30,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496128789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:30,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:30,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:43:30,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407804691] [2021-06-05 23:43:30,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:43:30,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:43:30,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:43:30,221 INFO L87 Difference]: Start difference. First operand 3267 states and 10767 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:32,851 INFO L93 Difference]: Finished difference Result 5843 states and 18494 transitions. [2021-06-05 23:43:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:43:32,852 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:32,861 INFO L225 Difference]: With dead ends: 5843 [2021-06-05 23:43:32,861 INFO L226 Difference]: Without dead ends: 5822 [2021-06-05 23:43:32,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 2240.0ms TimeCoverageRelationStatistics Valid=801, Invalid=4749, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:43:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2021-06-05 23:43:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 3414. [2021-06-05 23:43:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.296220334016994) internal successors, (11250), 3413 states have internal predecessors, (11250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 11250 transitions. [2021-06-05 23:43:32,925 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 11250 transitions. Word has length 30 [2021-06-05 23:43:32,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:32,926 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 11250 transitions. [2021-06-05 23:43:32,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 11250 transitions. [2021-06-05 23:43:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:32,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:32,930 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:33,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:33,133 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash 727469260, now seen corresponding path program 50 times [2021-06-05 23:43:33,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:33,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225283707] [2021-06-05 23:43:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:33,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:33,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225283707] [2021-06-05 23:43:33,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225283707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:33,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272172380] [2021-06-05 23:43:33,467 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 23:43:33,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:43:33,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:33,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:43:33,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:33,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:33,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 23:43:33,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:43:33,783 INFO L628 ElimStorePlain]: treesize reduction 81, result has 34.7 percent of original size [2021-06-05 23:43:33,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:43:33,798 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:43:33,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:33,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:33,810 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 23:43:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:33,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272172380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:33,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:33,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 23:43:33,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490592086] [2021-06-05 23:43:33,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:43:33,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:33,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:43:33,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:43:33,971 INFO L87 Difference]: Start difference. First operand 3414 states and 11250 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:41,477 INFO L93 Difference]: Finished difference Result 8999 states and 27962 transitions. [2021-06-05 23:43:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-05 23:43:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:41,512 INFO L225 Difference]: With dead ends: 8999 [2021-06-05 23:43:41,512 INFO L226 Difference]: Without dead ends: 8898 [2021-06-05 23:43:41,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7881 ImplicationChecksByTransitivity, 6118.0ms TimeCoverageRelationStatistics Valid=3253, Invalid=17917, Unknown=0, NotChecked=0, Total=21170 [2021-06-05 23:43:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8898 states. [2021-06-05 23:43:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8898 to 3927. [2021-06-05 23:43:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3926 states have (on average 3.327814569536424) internal successors, (13065), 3926 states have internal predecessors, (13065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 13065 transitions. [2021-06-05 23:43:41,584 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 13065 transitions. Word has length 30 [2021-06-05 23:43:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:41,584 INFO L482 AbstractCegarLoop]: Abstraction has 3927 states and 13065 transitions. [2021-06-05 23:43:41,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 13065 transitions. [2021-06-05 23:43:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:41,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:41,589 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:41,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:41,789 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:41,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1615181027, now seen corresponding path program 45 times [2021-06-05 23:43:41,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:41,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649245557] [2021-06-05 23:43:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:42,089 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 23:43:42,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:42,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649245557] [2021-06-05 23:43:42,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649245557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:42,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353746915] [2021-06-05 23:43:42,089 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 23:43:42,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:43:42,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:43:42,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:42,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:42,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:42,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:43:42,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:42,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:42,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:42,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:43:42,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:42,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:42,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:42,347 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:43:42,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:43:42,349 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:42,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:42,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:42,370 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:56 [2021-06-05 23:43:42,441 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 23:43:42,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353746915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:42,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:42,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:43:42,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679498572] [2021-06-05 23:43:42,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:43:42,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:42,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:43:42,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:43:42,442 INFO L87 Difference]: Start difference. First operand 3927 states and 13065 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:42,728 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 23:43:44,026 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 23:43:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:45,346 INFO L93 Difference]: Finished difference Result 5487 states and 17874 transitions. [2021-06-05 23:43:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:43:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:45,354 INFO L225 Difference]: With dead ends: 5487 [2021-06-05 23:43:45,354 INFO L226 Difference]: Without dead ends: 5468 [2021-06-05 23:43:45,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2654.2ms TimeCoverageRelationStatistics Valid=680, Invalid=3102, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:43:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2021-06-05 23:43:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 3920. [2021-06-05 23:43:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 3.326613932125542) internal successors, (13037), 3919 states have internal predecessors, (13037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 13037 transitions. [2021-06-05 23:43:45,410 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 13037 transitions. Word has length 30 [2021-06-05 23:43:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:45,410 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 13037 transitions. [2021-06-05 23:43:45,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 13037 transitions. [2021-06-05 23:43:45,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:45,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:45,414 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:45,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 23:43:45,615 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:45,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:45,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1196651331, now seen corresponding path program 46 times [2021-06-05 23:43:45,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:45,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823174766] [2021-06-05 23:43:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:45,918 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 23:43:45,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:45,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823174766] [2021-06-05 23:43:45,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823174766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:45,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528600934] [2021-06-05 23:43:45,918 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 23:43:45,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:43:45,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:45,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:45,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:46,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:46,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:46,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:46,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:46,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 23:43:46,105 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:46,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:46,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:46,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:46,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:46,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:43:46,119 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:43:46,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:46,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:46,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:49, output treesize:39 [2021-06-05 23:43:46,270 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 23:43:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528600934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:46,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:46,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:43:46,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946087117] [2021-06-05 23:43:46,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:46,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:46,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:46,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:46,271 INFO L87 Difference]: Start difference. First operand 3920 states and 13037 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:48,982 INFO L93 Difference]: Finished difference Result 5038 states and 16535 transitions. [2021-06-05 23:43:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:43:48,982 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:48,989 INFO L225 Difference]: With dead ends: 5038 [2021-06-05 23:43:48,989 INFO L226 Difference]: Without dead ends: 5013 [2021-06-05 23:43:48,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 2239.3ms TimeCoverageRelationStatistics Valid=553, Invalid=2753, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:43:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-06-05 23:43:49,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 3913. [2021-06-05 23:43:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 3.32719836400818) internal successors, (13016), 3912 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 13016 transitions. [2021-06-05 23:43:49,043 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 13016 transitions. Word has length 30 [2021-06-05 23:43:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:49,043 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 13016 transitions. [2021-06-05 23:43:49,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 13016 transitions. [2021-06-05 23:43:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:49,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:49,050 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:49,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 23:43:49,265 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1548180305, now seen corresponding path program 47 times [2021-06-05 23:43:49,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:49,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926568639] [2021-06-05 23:43:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:49,560 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 23:43:49,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:49,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926568639] [2021-06-05 23:43:49,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926568639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:49,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678713136] [2021-06-05 23:43:49,561 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 23:43:49,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:43:49,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:49,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:49,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:50,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:50,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:50,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:43:50,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:50,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:50,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:50,424 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:43:50,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:50,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:50,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:50,431 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:43:50,451 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 23:43:50,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678713136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:50,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:50,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:43:50,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307612839] [2021-06-05 23:43:50,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:43:50,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:50,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:43:50,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:43:50,452 INFO L87 Difference]: Start difference. First operand 3913 states and 13016 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:55,112 INFO L93 Difference]: Finished difference Result 5122 states and 16627 transitions. [2021-06-05 23:43:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:43:55,113 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:55,122 INFO L225 Difference]: With dead ends: 5122 [2021-06-05 23:43:55,122 INFO L226 Difference]: Without dead ends: 5107 [2021-06-05 23:43:55,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 3513.4ms TimeCoverageRelationStatistics Valid=585, Invalid=3447, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:43:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5107 states. [2021-06-05 23:43:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5107 to 3928. [2021-06-05 23:43:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 3.327221797810033) internal successors, (13066), 3927 states have internal predecessors, (13066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 13066 transitions. [2021-06-05 23:43:55,194 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 13066 transitions. Word has length 30 [2021-06-05 23:43:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:55,194 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 13066 transitions. [2021-06-05 23:43:55,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 13066 transitions. [2021-06-05 23:43:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:55,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:55,201 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:55,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 23:43:55,422 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:55,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:55,422 INFO L82 PathProgramCache]: Analyzing trace with hash -144109635, now seen corresponding path program 48 times [2021-06-05 23:43:55,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:55,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881060690] [2021-06-05 23:43:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:55,866 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 23:43:55,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:55,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881060690] [2021-06-05 23:43:55,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881060690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:55,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038218356] [2021-06-05 23:43:55,866 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 23:43:55,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:43:55,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:55,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:43:55,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:56,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:56,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:56,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:43:56,090 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:56,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:56,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:43:56,103 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:43:56,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:56,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:56,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 23:43:56,191 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 23:43:56,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038218356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:56,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:56,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:43:56,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143130170] [2021-06-05 23:43:56,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:56,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:56,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:56,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:56,192 INFO L87 Difference]: Start difference. First operand 3928 states and 13066 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:56,675 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 23:43:57,178 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 23:43:58,393 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 23:43:58,786 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 23:43:59,136 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 23:44:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:00,416 INFO L93 Difference]: Finished difference Result 5556 states and 18185 transitions. [2021-06-05 23:44:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:44:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:00,426 INFO L225 Difference]: With dead ends: 5556 [2021-06-05 23:44:00,426 INFO L226 Difference]: Without dead ends: 5531 [2021-06-05 23:44:00,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 3583.8ms TimeCoverageRelationStatistics Valid=730, Invalid=4240, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:44:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5531 states. [2021-06-05 23:44:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5531 to 3924. [2021-06-05 23:44:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 3.3257710935508538) internal successors, (13047), 3923 states have internal predecessors, (13047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 13047 transitions. [2021-06-05 23:44:00,509 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 13047 transitions. Word has length 30 [2021-06-05 23:44:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:00,510 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 13047 transitions. [2021-06-05 23:44:00,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:00,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 13047 transitions. [2021-06-05 23:44:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:00,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:00,515 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:00,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:00,736 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1515611133, now seen corresponding path program 49 times [2021-06-05 23:44:00,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:00,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847156040] [2021-06-05 23:44:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:01,185 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 23:44:01,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:01,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847156040] [2021-06-05 23:44:01,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847156040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:01,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120908042] [2021-06-05 23:44:01,186 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 23:44:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:01,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:01,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:01,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:01,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:44:01,435 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:01,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:01,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:44:01,452 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:01,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:01,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:01,466 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:45, output treesize:39 [2021-06-05 23:44:01,582 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 23:44:01,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120908042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:01,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:01,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:44:01,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170426191] [2021-06-05 23:44:01,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:01,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:01,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:01,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:01,583 INFO L87 Difference]: Start difference. First operand 3924 states and 13047 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 23:44:01,857 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-06-05 23:44:02,275 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 23:44:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:04,168 INFO L93 Difference]: Finished difference Result 5089 states and 16730 transitions. [2021-06-05 23:44:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:44:04,168 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) Word has length 30 [2021-06-05 23:44:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:04,176 INFO L225 Difference]: With dead ends: 5089 [2021-06-05 23:44:04,176 INFO L226 Difference]: Without dead ends: 5064 [2021-06-05 23:44:04,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2427.4ms TimeCoverageRelationStatistics Valid=521, Invalid=2559, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:44:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-06-05 23:44:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 3937. [2021-06-05 23:44:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3937 states, 3936 states have (on average 3.325711382113821) internal successors, (13090), 3936 states have internal predecessors, (13090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 13090 transitions. [2021-06-05 23:44:04,228 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 13090 transitions. Word has length 30 [2021-06-05 23:44:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:04,228 INFO L482 AbstractCegarLoop]: Abstraction has 3937 states and 13090 transitions. [2021-06-05 23:44:04,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 23:44:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 13090 transitions. [2021-06-05 23:44:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:04,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:04,233 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:04,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 23:44:04,433 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:04,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1572316365, now seen corresponding path program 50 times [2021-06-05 23:44:04,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:04,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488734786] [2021-06-05 23:44:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:04,727 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 23:44:04,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:04,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488734786] [2021-06-05 23:44:04,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488734786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:04,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294855203] [2021-06-05 23:44:04,727 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 23:44:04,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:04,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:04,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:05,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:44:05,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:05,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:05,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:44:05,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,069 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:44:05,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:44:05,071 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,091 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:80 [2021-06-05 23:44:05,187 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 23:44:05,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294855203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:05,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:05,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:44:05,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855874468] [2021-06-05 23:44:05,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:44:05,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:05,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:44:05,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:44:05,188 INFO L87 Difference]: Start difference. First operand 3937 states and 13090 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:05,996 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 23:44:06,981 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 23:44:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:09,239 INFO L93 Difference]: Finished difference Result 6097 states and 19532 transitions. [2021-06-05 23:44:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:44:09,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:09,247 INFO L225 Difference]: With dead ends: 6097 [2021-06-05 23:44:09,247 INFO L226 Difference]: Without dead ends: 6028 [2021-06-05 23:44:09,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 3049.4ms TimeCoverageRelationStatistics Valid=769, Invalid=4633, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:44:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2021-06-05 23:44:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 3918. [2021-06-05 23:44:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 3.3255042124074548) internal successors, (13026), 3917 states have internal predecessors, (13026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 13026 transitions. [2021-06-05 23:44:09,302 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 13026 transitions. Word has length 30 [2021-06-05 23:44:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:09,303 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 13026 transitions. [2021-06-05 23:44:09,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 13026 transitions. [2021-06-05 23:44:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:09,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:09,307 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:09,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 23:44:09,507 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:09,508 INFO L82 PathProgramCache]: Analyzing trace with hash 959989000, now seen corresponding path program 51 times [2021-06-05 23:44:09,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:09,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490809747] [2021-06-05 23:44:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:09,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:09,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490809747] [2021-06-05 23:44:09,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490809747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:09,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417818046] [2021-06-05 23:44:09,862 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 23:44:09,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:44:09,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:44:09,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:10,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:10,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:10,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2021-06-05 23:44:10,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:44:10,172 INFO L628 ElimStorePlain]: treesize reduction 116, result has 22.7 percent of original size [2021-06-05 23:44:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:10,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:10,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:44:10,177 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:10,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:10,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:10,184 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:18 [2021-06-05 23:44:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:10,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417818046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:10,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:10,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:44:10,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747001456] [2021-06-05 23:44:10,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:44:10,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:10,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:44:10,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:10,299 INFO L87 Difference]: Start difference. First operand 3918 states and 13026 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:14,662 INFO L93 Difference]: Finished difference Result 5420 states and 17378 transitions. [2021-06-05 23:44:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:44:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:14,670 INFO L225 Difference]: With dead ends: 5420 [2021-06-05 23:44:14,670 INFO L226 Difference]: Without dead ends: 5372 [2021-06-05 23:44:14,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 3360.4ms TimeCoverageRelationStatistics Valid=805, Invalid=6167, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:44:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5372 states. [2021-06-05 23:44:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5372 to 3886. [2021-06-05 23:44:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 3.327155727155727) internal successors, (12926), 3885 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 12926 transitions. [2021-06-05 23:44:14,724 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 12926 transitions. Word has length 30 [2021-06-05 23:44:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:14,724 INFO L482 AbstractCegarLoop]: Abstraction has 3886 states and 12926 transitions. [2021-06-05 23:44:14,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 12926 transitions. [2021-06-05 23:44:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:14,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:14,729 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:14,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 23:44:14,930 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:14,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2064359224, now seen corresponding path program 52 times [2021-06-05 23:44:14,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:14,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275739210] [2021-06-05 23:44:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:15,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:15,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275739210] [2021-06-05 23:44:15,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275739210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:15,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276441982] [2021-06-05 23:44:15,298 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 23:44:15,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:15,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:15,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:44:15,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:15,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:15,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:15,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:44:15,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:15,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:15,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:15,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:15,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:15,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:15,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:44:15,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:15,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:15,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:15,549 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:44:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:15,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276441982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:15,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:15,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 23:44:15,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656114900] [2021-06-05 23:44:15,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:44:15,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:15,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:44:15,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:44:15,573 INFO L87 Difference]: Start difference. First operand 3886 states and 12926 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:20,054 INFO L93 Difference]: Finished difference Result 5117 states and 16675 transitions. [2021-06-05 23:44:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 23:44:20,054 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:20,062 INFO L225 Difference]: With dead ends: 5117 [2021-06-05 23:44:20,062 INFO L226 Difference]: Without dead ends: 5095 [2021-06-05 23:44:20,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2948 ImplicationChecksByTransitivity, 3767.9ms TimeCoverageRelationStatistics Valid=1102, Invalid=7640, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 23:44:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5095 states. [2021-06-05 23:44:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5095 to 3892. [2021-06-05 23:44:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3892 states, 3891 states have (on average 3.3258802364430737) internal successors, (12941), 3891 states have internal predecessors, (12941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 12941 transitions. [2021-06-05 23:44:20,115 INFO L78 Accepts]: Start accepts. Automaton has 3892 states and 12941 transitions. Word has length 30 [2021-06-05 23:44:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:20,115 INFO L482 AbstractCegarLoop]: Abstraction has 3892 states and 12941 transitions. [2021-06-05 23:44:20,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3892 states and 12941 transitions. [2021-06-05 23:44:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:20,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:20,119 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:20,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:20,320 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:20,320 INFO L82 PathProgramCache]: Analyzing trace with hash -265355896, now seen corresponding path program 53 times [2021-06-05 23:44:20,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:20,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005750656] [2021-06-05 23:44:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:20,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:20,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005750656] [2021-06-05 23:44:20,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005750656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:20,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100849620] [2021-06-05 23:44:20,729 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 23:44:20,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:44:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:44:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:20,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:20,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 23:44:20,978 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:44:21,005 INFO L628 ElimStorePlain]: treesize reduction 93, result has 26.8 percent of original size [2021-06-05 23:44:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:21,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:21,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:44:21,009 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:21,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:21,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:21,018 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:19 [2021-06-05 23:44:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:21,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100849620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:21,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:21,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:44:21,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396891205] [2021-06-05 23:44:21,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:44:21,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:21,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:44:21,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:44:21,093 INFO L87 Difference]: Start difference. First operand 3892 states and 12941 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:24,613 INFO L93 Difference]: Finished difference Result 6676 states and 21560 transitions. [2021-06-05 23:44:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:44:24,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:24,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:24,623 INFO L225 Difference]: With dead ends: 6676 [2021-06-05 23:44:24,623 INFO L226 Difference]: Without dead ends: 6614 [2021-06-05 23:44:24,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 2914.8ms TimeCoverageRelationStatistics Valid=1016, Invalid=5626, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 23:44:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6614 states. [2021-06-05 23:44:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6614 to 3958. [2021-06-05 23:44:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3958 states, 3957 states have (on average 3.337124083901946) internal successors, (13205), 3957 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3958 states to 3958 states and 13205 transitions. [2021-06-05 23:44:24,686 INFO L78 Accepts]: Start accepts. Automaton has 3958 states and 13205 transitions. Word has length 30 [2021-06-05 23:44:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:24,687 INFO L482 AbstractCegarLoop]: Abstraction has 3958 states and 13205 transitions. [2021-06-05 23:44:24,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:24,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3958 states and 13205 transitions. [2021-06-05 23:44:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:24,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:24,691 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:24,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 23:44:24,892 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2142077546, now seen corresponding path program 54 times [2021-06-05 23:44:24,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:24,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007097326] [2021-06-05 23:44:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:25,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:25,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007097326] [2021-06-05 23:44:25,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007097326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:25,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051200471] [2021-06-05 23:44:25,229 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 23:44:25,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:44:25,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:44:25,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:25,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:25,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:25,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:44:25,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:25,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:25,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:25,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:25,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:25,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:44:25,588 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:25,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:25,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:25,605 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:44:25,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2021-06-05 23:44:25,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:25,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:25,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:25,626 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:42 [2021-06-05 23:44:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:25,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051200471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:25,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:25,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:44:25,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446882357] [2021-06-05 23:44:25,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:25,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:25,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:25,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:25,717 INFO L87 Difference]: Start difference. First operand 3958 states and 13205 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:31,443 INFO L93 Difference]: Finished difference Result 5686 states and 18260 transitions. [2021-06-05 23:44:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:44:31,444 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:31,452 INFO L225 Difference]: With dead ends: 5686 [2021-06-05 23:44:31,452 INFO L226 Difference]: Without dead ends: 5664 [2021-06-05 23:44:31,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3497 ImplicationChecksByTransitivity, 4842.8ms TimeCoverageRelationStatistics Valid=1311, Invalid=9401, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 23:44:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5664 states. [2021-06-05 23:44:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5664 to 3968. [2021-06-05 23:44:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 3.3403075371817494) internal successors, (13251), 3967 states have internal predecessors, (13251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 13251 transitions. [2021-06-05 23:44:31,513 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 13251 transitions. Word has length 30 [2021-06-05 23:44:31,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:31,514 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 13251 transitions. [2021-06-05 23:44:31,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:31,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 13251 transitions. [2021-06-05 23:44:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:31,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:31,519 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:31,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 23:44:31,720 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:31,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:31,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1653556858, now seen corresponding path program 55 times [2021-06-05 23:44:31,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:31,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122812416] [2021-06-05 23:44:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:32,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:32,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122812416] [2021-06-05 23:44:32,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122812416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:32,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130218804] [2021-06-05 23:44:32,099 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 23:44:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:32,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:32,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:32,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:32,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:32,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:44:32,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:32,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:32,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:32,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:32,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:32,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:32,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:44:32,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:32,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:32,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:32,387 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:44:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:32,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130218804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:32,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:32,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:44:32,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041038061] [2021-06-05 23:44:32,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:44:32,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:32,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:44:32,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:44:32,411 INFO L87 Difference]: Start difference. First operand 3968 states and 13251 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:34,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:34,936 INFO L93 Difference]: Finished difference Result 6530 states and 20907 transitions. [2021-06-05 23:44:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:44:34,936 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:34,946 INFO L225 Difference]: With dead ends: 6530 [2021-06-05 23:44:34,946 INFO L226 Difference]: Without dead ends: 6509 [2021-06-05 23:44:34,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1996.4ms TimeCoverageRelationStatistics Valid=630, Invalid=4340, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:44:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6509 states. [2021-06-05 23:44:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6509 to 4094. [2021-06-05 23:44:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 3.334717810896653) internal successors, (13649), 4093 states have internal predecessors, (13649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 13649 transitions. [2021-06-05 23:44:35,013 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 13649 transitions. Word has length 30 [2021-06-05 23:44:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:35,013 INFO L482 AbstractCegarLoop]: Abstraction has 4094 states and 13649 transitions. [2021-06-05 23:44:35,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 13649 transitions. [2021-06-05 23:44:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:35,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:35,018 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:35,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 23:44:35,233 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1936928584, now seen corresponding path program 56 times [2021-06-05 23:44:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:35,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824283583] [2021-06-05 23:44:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:35,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:35,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824283583] [2021-06-05 23:44:35,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824283583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:35,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694977600] [2021-06-05 23:44:35,580 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 23:44:35,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:35,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:35,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:35,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:35,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2021-06-05 23:44:35,865 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:35,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:35,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:35,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:44:35,877 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:35,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:35,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:35,886 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 23:44:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:36,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694977600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:36,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:36,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:44:36,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992950106] [2021-06-05 23:44:36,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:44:36,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:36,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:44:36,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:36,006 INFO L87 Difference]: Start difference. First operand 4094 states and 13649 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:39,809 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 23:44:40,378 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 23:44:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:43,356 INFO L93 Difference]: Finished difference Result 7700 states and 24181 transitions. [2021-06-05 23:44:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 23:44:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:43,366 INFO L225 Difference]: With dead ends: 7700 [2021-06-05 23:44:43,366 INFO L226 Difference]: Without dead ends: 7637 [2021-06-05 23:44:43,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4933 ImplicationChecksByTransitivity, 5910.8ms TimeCoverageRelationStatistics Valid=1971, Invalid=13035, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 23:44:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7637 states. [2021-06-05 23:44:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7637 to 4143. [2021-06-05 23:44:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 4142 states have (on average 3.3399323998068566) internal successors, (13834), 4142 states have internal predecessors, (13834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 13834 transitions. [2021-06-05 23:44:43,444 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 13834 transitions. Word has length 30 [2021-06-05 23:44:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:43,444 INFO L482 AbstractCegarLoop]: Abstraction has 4143 states and 13834 transitions. [2021-06-05 23:44:43,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 13834 transitions. [2021-06-05 23:44:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:43,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:43,449 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:43,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:43,650 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:43,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash -357721416, now seen corresponding path program 57 times [2021-06-05 23:44:43,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:43,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935102968] [2021-06-05 23:44:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:44,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:44,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935102968] [2021-06-05 23:44:44,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935102968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:44,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734960827] [2021-06-05 23:44:44,024 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 23:44:44,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:44:44,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:44,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:44,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:44,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:44,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 63 [2021-06-05 23:44:44,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:44:44,365 INFO L628 ElimStorePlain]: treesize reduction 219, result has 14.8 percent of original size [2021-06-05 23:44:44,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:44,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:44,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:44,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:44:44,371 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:44,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:44,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:44,379 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:50, output treesize:22 [2021-06-05 23:44:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:44,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734960827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:44,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:44,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:44:44,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858379991] [2021-06-05 23:44:44,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:44:44,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:44,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:44:44,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:44,489 INFO L87 Difference]: Start difference. First operand 4143 states and 13834 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:52,642 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 23:44:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:54,851 INFO L93 Difference]: Finished difference Result 9262 states and 29225 transitions. [2021-06-05 23:44:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-06-05 23:44:54,852 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:54,864 INFO L225 Difference]: With dead ends: 9262 [2021-06-05 23:44:54,865 INFO L226 Difference]: Without dead ends: 9205 [2021-06-05 23:44:54,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12275 ImplicationChecksByTransitivity, 8607.6ms TimeCoverageRelationStatistics Valid=4214, Invalid=27648, Unknown=0, NotChecked=0, Total=31862 [2021-06-05 23:44:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9205 states. [2021-06-05 23:44:54,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9205 to 4287. [2021-06-05 23:44:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4287 states, 4286 states have (on average 3.332011199253383) internal successors, (14281), 4286 states have internal predecessors, (14281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4287 states to 4287 states and 14281 transitions. [2021-06-05 23:44:54,951 INFO L78 Accepts]: Start accepts. Automaton has 4287 states and 14281 transitions. Word has length 30 [2021-06-05 23:44:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:54,951 INFO L482 AbstractCegarLoop]: Abstraction has 4287 states and 14281 transitions. [2021-06-05 23:44:54,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4287 states and 14281 transitions. [2021-06-05 23:44:54,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:54,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:54,981 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:55,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 23:44:55,181 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:55,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:55,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1606189540, now seen corresponding path program 58 times [2021-06-05 23:44:55,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:55,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15503931] [2021-06-05 23:44:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:55,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:55,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15503931] [2021-06-05 23:44:55,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15503931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:55,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249316607] [2021-06-05 23:44:55,541 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 23:44:55,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:55,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:55,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:44:55,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:55,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:55,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:55,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:55,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:44:55,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:55,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:55,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:55,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:55,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:55,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:55,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:44:55,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:55,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:55,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:55,786 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:44:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:55,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249316607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:55,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:55,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:44:55,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264956695] [2021-06-05 23:44:55,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:55,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:55,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:55,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:55,805 INFO L87 Difference]: Start difference. First operand 4287 states and 14281 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:00,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:00,261 INFO L93 Difference]: Finished difference Result 5455 states and 17740 transitions. [2021-06-05 23:45:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:45:00,261 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:00,268 INFO L225 Difference]: With dead ends: 5455 [2021-06-05 23:45:00,269 INFO L226 Difference]: Without dead ends: 5429 [2021-06-05 23:45:00,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 3708.8ms TimeCoverageRelationStatistics Valid=846, Invalid=6464, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 23:45:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5429 states. [2021-06-05 23:45:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5429 to 4283. [2021-06-05 23:45:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4283 states, 4282 states have (on average 3.331387202241943) internal successors, (14265), 4282 states have internal predecessors, (14265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4283 states to 4283 states and 14265 transitions. [2021-06-05 23:45:00,324 INFO L78 Accepts]: Start accepts. Automaton has 4283 states and 14265 transitions. Word has length 30 [2021-06-05 23:45:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:00,324 INFO L482 AbstractCegarLoop]: Abstraction has 4283 states and 14265 transitions. [2021-06-05 23:45:00,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:00,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4283 states and 14265 transitions. [2021-06-05 23:45:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:00,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:00,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:00,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:00,553 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:00,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1000560704, now seen corresponding path program 59 times [2021-06-05 23:45:00,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:00,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828847027] [2021-06-05 23:45:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:00,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:00,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828847027] [2021-06-05 23:45:00,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828847027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:00,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49660881] [2021-06-05 23:45:00,858 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 23:45:00,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:45:00,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:00,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:45:00,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:01,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:01,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:01,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:01,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:01,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:45:01,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:01,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:01,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:01,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:01,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:01,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:01,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:45:01,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:01,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:01,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:01,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:45:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:01,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49660881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:01,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:01,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 23:45:01,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252300042] [2021-06-05 23:45:01,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:45:01,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:01,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:45:01,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:45:01,129 INFO L87 Difference]: Start difference. First operand 4283 states and 14265 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:03,599 INFO L93 Difference]: Finished difference Result 5310 states and 17283 transitions. [2021-06-05 23:45:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:45:03,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:03,607 INFO L225 Difference]: With dead ends: 5310 [2021-06-05 23:45:03,607 INFO L226 Difference]: Without dead ends: 5284 [2021-06-05 23:45:03,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2005.8ms TimeCoverageRelationStatistics Valid=452, Invalid=3208, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:45:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-06-05 23:45:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4295. [2021-06-05 23:45:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4294 states have (on average 3.3290638099673964) internal successors, (14295), 4294 states have internal predecessors, (14295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 14295 transitions. [2021-06-05 23:45:03,662 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 14295 transitions. Word has length 30 [2021-06-05 23:45:03,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:03,662 INFO L482 AbstractCegarLoop]: Abstraction has 4295 states and 14295 transitions. [2021-06-05 23:45:03,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 14295 transitions. [2021-06-05 23:45:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:03,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:03,667 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:03,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:03,868 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1676335248, now seen corresponding path program 60 times [2021-06-05 23:45:03,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:03,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866679135] [2021-06-05 23:45:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:04,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:04,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866679135] [2021-06-05 23:45:04,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866679135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:04,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506996397] [2021-06-05 23:45:04,190 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 23:45:04,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:45:04,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:04,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:45:04,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:04,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:04,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:04,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:04,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:04,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:45:04,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:04,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:04,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:04,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:04,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:04,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:04,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:45:04,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:04,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:04,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:04,430 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:45:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:04,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506996397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:04,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:04,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:45:04,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833716690] [2021-06-05 23:45:04,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:45:04,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:04,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:45:04,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:45:04,456 INFO L87 Difference]: Start difference. First operand 4295 states and 14295 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:45:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:07,180 INFO L93 Difference]: Finished difference Result 5305 states and 17262 transitions. [2021-06-05 23:45:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:45:07,180 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) Word has length 30 [2021-06-05 23:45:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:07,188 INFO L225 Difference]: With dead ends: 5305 [2021-06-05 23:45:07,188 INFO L226 Difference]: Without dead ends: 5279 [2021-06-05 23:45:07,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 2270.2ms TimeCoverageRelationStatistics Valid=529, Invalid=3761, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:45:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5279 states. [2021-06-05 23:45:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5279 to 4275. [2021-06-05 23:45:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 4274 states have (on average 3.3306036499766027) internal successors, (14235), 4274 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 14235 transitions. [2021-06-05 23:45:07,252 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 14235 transitions. Word has length 30 [2021-06-05 23:45:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:07,252 INFO L482 AbstractCegarLoop]: Abstraction has 4275 states and 14235 transitions. [2021-06-05 23:45:07,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:45:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 14235 transitions. [2021-06-05 23:45:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:07,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:07,258 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:07,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 23:45:07,458 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash -597200716, now seen corresponding path program 61 times [2021-06-05 23:45:07,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:07,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481620973] [2021-06-05 23:45:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:07,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:07,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481620973] [2021-06-05 23:45:07,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481620973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:07,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241338649] [2021-06-05 23:45:07,830 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 23:45:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:07,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:45:07,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:08,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:08,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:08,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:08,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:08,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:45:08,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:08,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:08,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:08,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:08,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:08,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:08,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:45:08,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:08,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:08,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:08,054 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:45:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:08,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241338649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:08,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:08,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 23:45:08,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285282676] [2021-06-05 23:45:08,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:45:08,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:08,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:45:08,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:45:08,079 INFO L87 Difference]: Start difference. First operand 4275 states and 14235 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:09,679 INFO L93 Difference]: Finished difference Result 5316 states and 17285 transitions. [2021-06-05 23:45:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:45:09,679 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:09,687 INFO L225 Difference]: With dead ends: 5316 [2021-06-05 23:45:09,687 INFO L226 Difference]: Without dead ends: 5290 [2021-06-05 23:45:09,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1432.5ms TimeCoverageRelationStatistics Valid=319, Invalid=2033, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:45:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5290 states. [2021-06-05 23:45:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5290 to 4213. [2021-06-05 23:45:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 3.3395061728395063) internal successors, (14066), 4212 states have internal predecessors, (14066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 14066 transitions. [2021-06-05 23:45:09,747 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 14066 transitions. Word has length 30 [2021-06-05 23:45:09,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:09,747 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 14066 transitions. [2021-06-05 23:45:09,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 14066 transitions. [2021-06-05 23:45:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:09,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:09,753 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:09,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 23:45:09,953 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:09,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2103438638, now seen corresponding path program 62 times [2021-06-05 23:45:09,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:09,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078715979] [2021-06-05 23:45:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:10,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:10,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078715979] [2021-06-05 23:45:10,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078715979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:10,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498584827] [2021-06-05 23:45:10,303 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 23:45:10,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:10,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:10,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:45:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:10,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:10,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:10,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:10,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:10,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:45:10,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:10,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:10,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:10,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:10,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:10,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:10,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:45:10,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:10,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:10,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:10,573 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 23:45:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:10,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498584827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:10,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:10,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-05 23:45:10,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51800185] [2021-06-05 23:45:10,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:45:10,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:10,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:45:10,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:45:10,641 INFO L87 Difference]: Start difference. First operand 4213 states and 14066 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:12,796 INFO L93 Difference]: Finished difference Result 7093 states and 22608 transitions. [2021-06-05 23:45:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:45:12,796 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:12,805 INFO L225 Difference]: With dead ends: 7093 [2021-06-05 23:45:12,805 INFO L226 Difference]: Without dead ends: 7001 [2021-06-05 23:45:12,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1575.6ms TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:45:12,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-05 23:45:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 4288. [2021-06-05 23:45:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 4287 states have (on average 3.339164917191509) internal successors, (14315), 4287 states have internal predecessors, (14315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 14315 transitions. [2021-06-05 23:45:12,876 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 14315 transitions. Word has length 30 [2021-06-05 23:45:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:12,876 INFO L482 AbstractCegarLoop]: Abstraction has 4288 states and 14315 transitions. [2021-06-05 23:45:12,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 14315 transitions. [2021-06-05 23:45:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:12,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:12,881 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:13,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 23:45:13,082 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:13,082 INFO L82 PathProgramCache]: Analyzing trace with hash -701792548, now seen corresponding path program 63 times [2021-06-05 23:45:13,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:13,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051916794] [2021-06-05 23:45:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:13,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:13,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051916794] [2021-06-05 23:45:13,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051916794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:13,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980878142] [2021-06-05 23:45:13,416 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 23:45:13,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:45:13,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:13,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:45:13,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:13,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:13,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:13,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:13,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 23:45:13,725 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:45:13,744 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-05 23:45:13,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:13,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:13,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:45:13,748 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:13,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:13,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:13,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:18 [2021-06-05 23:45:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:13,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980878142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:13,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:13,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-05 23:45:13,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501983284] [2021-06-05 23:45:13,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:45:13,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:13,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:45:13,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:45:13,859 INFO L87 Difference]: Start difference. First operand 4288 states and 14315 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:17,353 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 23:45:17,841 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-06-05 23:45:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:18,688 INFO L93 Difference]: Finished difference Result 8753 states and 27801 transitions. [2021-06-05 23:45:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 23:45:18,688 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:18,701 INFO L225 Difference]: With dead ends: 8753 [2021-06-05 23:45:18,701 INFO L226 Difference]: Without dead ends: 8653 [2021-06-05 23:45:18,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 3874.0ms TimeCoverageRelationStatistics Valid=1785, Invalid=9987, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:45:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8653 states. [2021-06-05 23:45:18,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8653 to 4426. [2021-06-05 23:45:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 3.336271186440678) internal successors, (14763), 4425 states have internal predecessors, (14763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 14763 transitions. [2021-06-05 23:45:18,793 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 14763 transitions. Word has length 30 [2021-06-05 23:45:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:18,793 INFO L482 AbstractCegarLoop]: Abstraction has 4426 states and 14763 transitions. [2021-06-05 23:45:18,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 14763 transitions. [2021-06-05 23:45:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:18,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:18,798 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:18,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 23:45:18,998 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:18,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1775689368, now seen corresponding path program 64 times [2021-06-05 23:45:18,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:18,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330304425] [2021-06-05 23:45:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:19,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:19,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330304425] [2021-06-05 23:45:19,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330304425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:19,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200082384] [2021-06-05 23:45:19,385 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 23:45:19,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:45:19,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:45:19,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:19,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:19,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:19,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:19,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:19,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:45:19,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:19,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:19,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:19,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:19,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:45:19,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:19,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:19,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:19,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:45:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:19,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200082384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:19,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:19,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:45:19,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327737869] [2021-06-05 23:45:19,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:45:19,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:19,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:45:19,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:45:19,647 INFO L87 Difference]: Start difference. First operand 4426 states and 14763 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:24,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:24,100 INFO L93 Difference]: Finished difference Result 5777 states and 18640 transitions. [2021-06-05 23:45:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 23:45:24,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:24,108 INFO L225 Difference]: With dead ends: 5777 [2021-06-05 23:45:24,108 INFO L226 Difference]: Without dead ends: 5762 [2021-06-05 23:45:24,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2923 ImplicationChecksByTransitivity, 3779.8ms TimeCoverageRelationStatistics Valid=1112, Invalid=7444, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 23:45:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5762 states. [2021-06-05 23:45:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5762 to 4422. [2021-06-05 23:45:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4421 states have (on average 3.3365754354218504) internal successors, (14751), 4421 states have internal predecessors, (14751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 14751 transitions. [2021-06-05 23:45:24,179 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 14751 transitions. Word has length 30 [2021-06-05 23:45:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:24,179 INFO L482 AbstractCegarLoop]: Abstraction has 4422 states and 14751 transitions. [2021-06-05 23:45:24,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:24,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 14751 transitions. [2021-06-05 23:45:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:24,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:24,185 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:24,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:24,385 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:24,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2049008924, now seen corresponding path program 65 times [2021-06-05 23:45:24,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:24,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066993427] [2021-06-05 23:45:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:24,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:24,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066993427] [2021-06-05 23:45:24,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066993427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:24,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111989653] [2021-06-05 23:45:24,787 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 23:45:24,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:45:24,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:24,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:45:24,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:25,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:25,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:25,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:25,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:25,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:45:25,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:25,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:25,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:25,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:25,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:45:25,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:25,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:25,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:25,078 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:45:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:25,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111989653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:25,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:25,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:45:25,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381858258] [2021-06-05 23:45:25,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:45:25,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:25,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:45:25,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:45:25,102 INFO L87 Difference]: Start difference. First operand 4422 states and 14751 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:27,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:27,226 INFO L93 Difference]: Finished difference Result 6448 states and 20943 transitions. [2021-06-05 23:45:27,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:45:27,227 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:27,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:27,236 INFO L225 Difference]: With dead ends: 6448 [2021-06-05 23:45:27,237 INFO L226 Difference]: Without dead ends: 6427 [2021-06-05 23:45:27,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1785.6ms TimeCoverageRelationStatistics Valid=519, Invalid=3141, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:45:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6427 states. [2021-06-05 23:45:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6427 to 4435. [2021-06-05 23:45:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4435 states, 4434 states have (on average 3.3344609833107803) internal successors, (14785), 4434 states have internal predecessors, (14785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4435 states to 4435 states and 14785 transitions. [2021-06-05 23:45:27,308 INFO L78 Accepts]: Start accepts. Automaton has 4435 states and 14785 transitions. Word has length 30 [2021-06-05 23:45:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:27,308 INFO L482 AbstractCegarLoop]: Abstraction has 4435 states and 14785 transitions. [2021-06-05 23:45:27,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4435 states and 14785 transitions. [2021-06-05 23:45:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:27,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:27,314 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:27,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:27,514 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:27,514 INFO L82 PathProgramCache]: Analyzing trace with hash 773219232, now seen corresponding path program 66 times [2021-06-05 23:45:27,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:27,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646117172] [2021-06-05 23:45:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:27,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:27,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646117172] [2021-06-05 23:45:27,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646117172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:27,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117606594] [2021-06-05 23:45:27,884 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 23:45:27,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:45:27,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:27,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:45:27,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:28,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:28,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:28,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:45:28,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:28,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:28,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:28,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:28,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:28,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:45:28,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:28,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:28,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:28,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:45:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:28,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117606594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:28,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:28,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:45:28,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194786042] [2021-06-05 23:45:28,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:45:28,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:45:28,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:45:28,167 INFO L87 Difference]: Start difference. First operand 4435 states and 14785 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:33,607 INFO L93 Difference]: Finished difference Result 6020 states and 19485 transitions. [2021-06-05 23:45:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 23:45:33,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:33,615 INFO L225 Difference]: With dead ends: 6020 [2021-06-05 23:45:33,616 INFO L226 Difference]: Without dead ends: 5998 [2021-06-05 23:45:33,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 4240.8ms TimeCoverageRelationStatistics Valid=1155, Invalid=8351, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 23:45:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5998 states. [2021-06-05 23:45:33,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5998 to 4432. [2021-06-05 23:45:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 4431 states have (on average 3.336041525614985) internal successors, (14782), 4431 states have internal predecessors, (14782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 14782 transitions. [2021-06-05 23:45:33,677 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 14782 transitions. Word has length 30 [2021-06-05 23:45:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:33,677 INFO L482 AbstractCegarLoop]: Abstraction has 4432 states and 14782 transitions. [2021-06-05 23:45:33,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 14782 transitions. [2021-06-05 23:45:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:33,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:33,682 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:33,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:33,883 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:33,883 INFO L82 PathProgramCache]: Analyzing trace with hash -525612764, now seen corresponding path program 67 times [2021-06-05 23:45:33,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:33,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057460653] [2021-06-05 23:45:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:34,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:34,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057460653] [2021-06-05 23:45:34,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057460653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:34,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287534733] [2021-06-05 23:45:34,223 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 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 23:45:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:34,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:34,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:34,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:45:34,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:34,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:34,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:34,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2021-06-05 23:45:34,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:34,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:3 [2021-06-05 23:45:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:34,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287534733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:34,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:34,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:45:34,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486670447] [2021-06-05 23:45:34,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:45:34,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:34,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:45:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:45:34,592 INFO L87 Difference]: Start difference. First operand 4432 states and 14782 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:37,226 INFO L93 Difference]: Finished difference Result 6936 states and 22388 transitions. [2021-06-05 23:45:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:45:37,226 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:37,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:37,236 INFO L225 Difference]: With dead ends: 6936 [2021-06-05 23:45:37,236 INFO L226 Difference]: Without dead ends: 6915 [2021-06-05 23:45:37,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1977.3ms TimeCoverageRelationStatistics Valid=637, Invalid=3919, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:45:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6915 states. [2021-06-05 23:45:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6915 to 4468. [2021-06-05 23:45:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4468 states, 4467 states have (on average 3.338929930602194) internal successors, (14915), 4467 states have internal predecessors, (14915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4468 states to 4468 states and 14915 transitions. [2021-06-05 23:45:37,306 INFO L78 Accepts]: Start accepts. Automaton has 4468 states and 14915 transitions. Word has length 30 [2021-06-05 23:45:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:37,306 INFO L482 AbstractCegarLoop]: Abstraction has 4468 states and 14915 transitions. [2021-06-05 23:45:37,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4468 states and 14915 transitions. [2021-06-05 23:45:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:37,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:37,311 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:37,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:37,511 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:37,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:37,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1247495072, now seen corresponding path program 68 times [2021-06-05 23:45:37,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:37,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472064869] [2021-06-05 23:45:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:37,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:37,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472064869] [2021-06-05 23:45:37,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472064869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:37,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130137941] [2021-06-05 23:45:37,858 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 23:45:37,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:37,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:45:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:38,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:38,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:38,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:38,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:38,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 23:45:38,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:45:38,171 INFO L628 ElimStorePlain]: treesize reduction 46, result has 48.3 percent of original size [2021-06-05 23:45:38,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:38,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:45:38,175 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:38,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:38,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:38,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 23:45:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:38,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130137941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:38,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:38,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 23:45:38,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859170330] [2021-06-05 23:45:38,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:45:38,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:38,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:45:38,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:45:38,296 INFO L87 Difference]: Start difference. First operand 4468 states and 14915 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:46,346 INFO L93 Difference]: Finished difference Result 9655 states and 30623 transitions. [2021-06-05 23:45:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-05 23:45:46,346 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:46,362 INFO L225 Difference]: With dead ends: 9655 [2021-06-05 23:45:46,362 INFO L226 Difference]: Without dead ends: 9569 [2021-06-05 23:45:46,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7196 ImplicationChecksByTransitivity, 6178.3ms TimeCoverageRelationStatistics Valid=2439, Invalid=17301, Unknown=0, NotChecked=0, Total=19740 [2021-06-05 23:45:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9569 states. [2021-06-05 23:45:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9569 to 4471. [2021-06-05 23:45:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4471 states, 4470 states have (on average 3.33668903803132) internal successors, (14915), 4470 states have internal predecessors, (14915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 14915 transitions. [2021-06-05 23:45:46,455 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 14915 transitions. Word has length 30 [2021-06-05 23:45:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:46,455 INFO L482 AbstractCegarLoop]: Abstraction has 4471 states and 14915 transitions. [2021-06-05 23:45:46,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 14915 transitions. [2021-06-05 23:45:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:46,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:46,461 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:46,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 23:45:46,661 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:46,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1783236413, now seen corresponding path program 51 times [2021-06-05 23:45:46,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:46,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361155446] [2021-06-05 23:45:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:46,871 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 23:45:46,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:46,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361155446] [2021-06-05 23:45:46,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361155446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:46,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731763150] [2021-06-05 23:45:46,872 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 23:45:46,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:45:46,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:45:46,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:47,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:47,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:47,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:45:47,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:47,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:47,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:47,165 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:45:47,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:47,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:47,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:47,172 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-06-05 23:45:47,191 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 23:45:47,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731763150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:47,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:47,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:45:47,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459042995] [2021-06-05 23:45:47,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:45:47,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:47,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:45:47,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:45:47,192 INFO L87 Difference]: Start difference. First operand 4471 states and 14915 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 23:45:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:48,028 INFO L93 Difference]: Finished difference Result 5384 states and 17730 transitions. [2021-06-05 23:45:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:45:48,029 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) Word has length 30 [2021-06-05 23:45:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:48,037 INFO L225 Difference]: With dead ends: 5384 [2021-06-05 23:45:48,037 INFO L226 Difference]: Without dead ends: 5369 [2021-06-05 23:45:48,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 807.5ms TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:45:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5369 states. [2021-06-05 23:45:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5369 to 4486. [2021-06-05 23:45:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4486 states, 4485 states have (on average 3.336231884057971) internal successors, (14963), 4485 states have internal predecessors, (14963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 14963 transitions. [2021-06-05 23:45:48,113 INFO L78 Accepts]: Start accepts. Automaton has 4486 states and 14963 transitions. Word has length 30 [2021-06-05 23:45:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:48,113 INFO L482 AbstractCegarLoop]: Abstraction has 4486 states and 14963 transitions. [2021-06-05 23:45:48,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 23:45:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4486 states and 14963 transitions. [2021-06-05 23:45:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:48,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:48,118 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:48,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:48,319 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1936352675, now seen corresponding path program 52 times [2021-06-05 23:45:48,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:48,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838150597] [2021-06-05 23:45:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:48,538 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 23:45:48,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:48,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838150597] [2021-06-05 23:45:48,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838150597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:48,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041996159] [2021-06-05 23:45:48,538 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 23:45:48,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:45:48,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:48,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:45:48,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:48,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:48,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:48,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:45:48,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:48,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:48,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:48,786 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:45:48,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:48,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:48,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:48,792 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:45:48,806 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 23:45:48,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041996159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:48,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:48,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:45:48,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598931553] [2021-06-05 23:45:48,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:45:48,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:48,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:45:48,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:45:48,807 INFO L87 Difference]: Start difference. First operand 4486 states and 14963 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:50,572 INFO L93 Difference]: Finished difference Result 6109 states and 19959 transitions. [2021-06-05 23:45:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:45:50,572 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:50,581 INFO L225 Difference]: With dead ends: 6109 [2021-06-05 23:45:50,582 INFO L226 Difference]: Without dead ends: 6090 [2021-06-05 23:45:50,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1451.4ms TimeCoverageRelationStatistics Valid=349, Invalid=2201, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:45:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6090 states. [2021-06-05 23:45:50,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6090 to 4531. [2021-06-05 23:45:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4531 states, 4530 states have (on average 3.3386313465783664) internal successors, (15124), 4530 states have internal predecessors, (15124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4531 states to 4531 states and 15124 transitions. [2021-06-05 23:45:50,669 INFO L78 Accepts]: Start accepts. Automaton has 4531 states and 15124 transitions. Word has length 30 [2021-06-05 23:45:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:50,669 INFO L482 AbstractCegarLoop]: Abstraction has 4531 states and 15124 transitions. [2021-06-05 23:45:50,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4531 states and 15124 transitions. [2021-06-05 23:45:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:50,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:50,675 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:50,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:50,875 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:50,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1725054549, now seen corresponding path program 53 times [2021-06-05 23:45:50,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:50,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546095187] [2021-06-05 23:45:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:51,089 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 23:45:51,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:51,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546095187] [2021-06-05 23:45:51,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546095187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:51,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211828813] [2021-06-05 23:45:51,089 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 23:45:51,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:45:51,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:51,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:45:51,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:51,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:51,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:51,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:45:51,302 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:51,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:51,312 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:45:51,313 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:51,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:51,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:51,323 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:19 [2021-06-05 23:45:51,365 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 23:45:51,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211828813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:51,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:51,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:45:51,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299093501] [2021-06-05 23:45:51,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:45:51,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:51,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:45:51,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:45:51,366 INFO L87 Difference]: Start difference. First operand 4531 states and 15124 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:52,844 INFO L93 Difference]: Finished difference Result 6199 states and 20320 transitions. [2021-06-05 23:45:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:45:52,844 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:52,854 INFO L225 Difference]: With dead ends: 6199 [2021-06-05 23:45:52,854 INFO L226 Difference]: Without dead ends: 6184 [2021-06-05 23:45:52,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1314.6ms TimeCoverageRelationStatistics Valid=464, Invalid=2086, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:45:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6184 states. [2021-06-05 23:45:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6184 to 4525. [2021-06-05 23:45:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 3.3370910698496905) internal successors, (15097), 4524 states have internal predecessors, (15097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 15097 transitions. [2021-06-05 23:45:52,947 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 15097 transitions. Word has length 30 [2021-06-05 23:45:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:52,947 INFO L482 AbstractCegarLoop]: Abstraction has 4525 states and 15097 transitions. [2021-06-05 23:45:52,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 15097 transitions. [2021-06-05 23:45:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:52,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:52,953 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:53,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 23:45:53,154 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:53,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:53,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1099438741, now seen corresponding path program 54 times [2021-06-05 23:45:53,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:53,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266676161] [2021-06-05 23:45:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:53,365 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 23:45:53,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:53,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266676161] [2021-06-05 23:45:53,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266676161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:53,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593428474] [2021-06-05 23:45:53,366 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 23:45:53,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:45:53,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:53,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:45:53,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:53,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:53,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:53,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:53,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:45:53,554 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:53,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:53,562 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:45:53,563 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:53,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:53,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:53,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:45:53,628 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 23:45:53,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593428474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:53,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:53,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:45:53,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131844693] [2021-06-05 23:45:53,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:45:53,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:45:53,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:45:53,629 INFO L87 Difference]: Start difference. First operand 4525 states and 15097 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:55,301 INFO L93 Difference]: Finished difference Result 6088 states and 20016 transitions. [2021-06-05 23:45:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:45:55,302 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:55,311 INFO L225 Difference]: With dead ends: 6088 [2021-06-05 23:45:55,311 INFO L226 Difference]: Without dead ends: 6063 [2021-06-05 23:45:55,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1467.1ms TimeCoverageRelationStatistics Valid=427, Invalid=2543, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:45:55,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-06-05 23:45:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4480. [2021-06-05 23:45:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 3.3331100692118776) internal successors, (14929), 4479 states have internal predecessors, (14929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 14929 transitions. [2021-06-05 23:45:55,406 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 14929 transitions. Word has length 30 [2021-06-05 23:45:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:55,406 INFO L482 AbstractCegarLoop]: Abstraction has 4480 states and 14929 transitions. [2021-06-05 23:45:55,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 14929 transitions. [2021-06-05 23:45:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:55,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:55,412 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:55,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:55,612 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:55,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:55,613 INFO L82 PathProgramCache]: Analyzing trace with hash -345168329, now seen corresponding path program 55 times [2021-06-05 23:45:55,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:55,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333217352] [2021-06-05 23:45:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:55,861 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 23:45:55,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:55,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333217352] [2021-06-05 23:45:55,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333217352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:55,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144148970] [2021-06-05 23:45:55,862 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 23:45:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:55,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:45:55,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:56,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:56,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:56,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 23:45:56,101 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:56,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:56,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:56,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:56,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:45:56,112 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:56,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:56,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:56,119 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:45:56,161 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 23:45:56,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144148970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:56,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:56,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:45:56,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732300665] [2021-06-05 23:45:56,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:45:56,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:56,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:45:56,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:45:56,162 INFO L87 Difference]: Start difference. First operand 4480 states and 14929 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:58,319 INFO L93 Difference]: Finished difference Result 6113 states and 19933 transitions. [2021-06-05 23:45:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:45:58,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:58,328 INFO L225 Difference]: With dead ends: 6113 [2021-06-05 23:45:58,329 INFO L226 Difference]: Without dead ends: 6067 [2021-06-05 23:45:58,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1587.8ms TimeCoverageRelationStatistics Valid=380, Invalid=2812, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:45:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2021-06-05 23:45:58,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 4447. [2021-06-05 23:45:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4446 states have (on average 3.332433648223122) internal successors, (14816), 4446 states have internal predecessors, (14816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 14816 transitions. [2021-06-05 23:45:58,403 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 14816 transitions. Word has length 30 [2021-06-05 23:45:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:58,403 INFO L482 AbstractCegarLoop]: Abstraction has 4447 states and 14816 transitions. [2021-06-05 23:45:58,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 14816 transitions. [2021-06-05 23:45:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:58,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:58,409 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:58,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 23:45:58,609 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash -329630497, now seen corresponding path program 56 times [2021-06-05 23:45:58,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:58,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970023630] [2021-06-05 23:45:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:58,849 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 23:45:58,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:58,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970023630] [2021-06-05 23:45:58,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970023630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:58,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049882808] [2021-06-05 23:45:58,849 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 23:45:58,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:58,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:58,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:58,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:59,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:59,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:45:59,038 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:59,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:59,046 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:45:59,048 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:59,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:59,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:59,055 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:45:59,130 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 23:45:59,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049882808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:59,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:59,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:45:59,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299135223] [2021-06-05 23:45:59,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:45:59,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:59,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:45:59,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:45:59,131 INFO L87 Difference]: Start difference. First operand 4447 states and 14816 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:00,944 INFO L93 Difference]: Finished difference Result 6558 states and 21381 transitions. [2021-06-05 23:46:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:46:00,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:00,954 INFO L225 Difference]: With dead ends: 6558 [2021-06-05 23:46:00,955 INFO L226 Difference]: Without dead ends: 6508 [2021-06-05 23:46:00,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1493.3ms TimeCoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:46:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6508 states. [2021-06-05 23:46:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6508 to 4468. [2021-06-05 23:46:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4468 states, 4467 states have (on average 3.3335571972240876) internal successors, (14891), 4467 states have internal predecessors, (14891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4468 states to 4468 states and 14891 transitions. [2021-06-05 23:46:01,034 INFO L78 Accepts]: Start accepts. Automaton has 4468 states and 14891 transitions. Word has length 30 [2021-06-05 23:46:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:01,034 INFO L482 AbstractCegarLoop]: Abstraction has 4468 states and 14891 transitions. [2021-06-05 23:46:01,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4468 states and 14891 transitions. [2021-06-05 23:46:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:01,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:01,040 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:01,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 23:46:01,249 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:01,249 INFO L82 PathProgramCache]: Analyzing trace with hash 882077603, now seen corresponding path program 57 times [2021-06-05 23:46:01,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:01,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112278286] [2021-06-05 23:46:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:01,553 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 23:46:01,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:01,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112278286] [2021-06-05 23:46:01,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112278286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:01,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395723128] [2021-06-05 23:46:01,554 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 23:46:01,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:46:01,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:01,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:46:01,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:01,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:01,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:01,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:46:01,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:01,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:01,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:01,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:46:01,864 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:01,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:01,882 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:46:01,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:46:01,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:01,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:01,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:46:01,916 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:45, output treesize:59 [2021-06-05 23:46:02,004 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 23:46:02,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395723128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:02,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:02,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:46:02,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908098352] [2021-06-05 23:46:02,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:02,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:02,005 INFO L87 Difference]: Start difference. First operand 4468 states and 14891 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:03,447 INFO L93 Difference]: Finished difference Result 5915 states and 19379 transitions. [2021-06-05 23:46:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:46:03,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:03,457 INFO L225 Difference]: With dead ends: 5915 [2021-06-05 23:46:03,457 INFO L226 Difference]: Without dead ends: 5867 [2021-06-05 23:46:03,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1257.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1793, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:46:03,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2021-06-05 23:46:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 4507. [2021-06-05 23:46:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 4506 states have (on average 3.331335996449179) internal successors, (15011), 4506 states have internal predecessors, (15011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 15011 transitions. [2021-06-05 23:46:03,534 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 15011 transitions. Word has length 30 [2021-06-05 23:46:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:03,534 INFO L482 AbstractCegarLoop]: Abstraction has 4507 states and 15011 transitions. [2021-06-05 23:46:03,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 15011 transitions. [2021-06-05 23:46:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:03,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:03,540 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:03,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 23:46:03,745 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:03,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1259499849, now seen corresponding path program 58 times [2021-06-05 23:46:03,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:03,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964524482] [2021-06-05 23:46:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:03,981 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 23:46:03,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:03,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964524482] [2021-06-05 23:46:03,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964524482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:03,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821972370] [2021-06-05 23:46:03,982 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 23:46:04,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:46:04,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:04,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:46:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:04,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:04,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:04,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-06-05 23:46:04,194 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:04,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:04,202 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:46:04,203 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:04,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:04,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:04,210 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:17 [2021-06-05 23:46:04,256 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 23:46:04,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821972370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:04,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:04,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:46:04,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387982356] [2021-06-05 23:46:04,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:46:04,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:04,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:46:04,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:46:04,257 INFO L87 Difference]: Start difference. First operand 4507 states and 15011 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:06,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:06,011 INFO L93 Difference]: Finished difference Result 6362 states and 20772 transitions. [2021-06-05 23:46:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:46:06,011 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:06,021 INFO L225 Difference]: With dead ends: 6362 [2021-06-05 23:46:06,021 INFO L226 Difference]: Without dead ends: 6312 [2021-06-05 23:46:06,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1461.8ms TimeCoverageRelationStatistics Valid=447, Invalid=2633, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:46:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6312 states. [2021-06-05 23:46:06,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6312 to 4492. [2021-06-05 23:46:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4492 states, 4491 states have (on average 3.331774660431975) internal successors, (14963), 4491 states have internal predecessors, (14963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4492 states to 4492 states and 14963 transitions. [2021-06-05 23:46:06,099 INFO L78 Accepts]: Start accepts. Automaton has 4492 states and 14963 transitions. Word has length 30 [2021-06-05 23:46:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:06,099 INFO L482 AbstractCegarLoop]: Abstraction has 4492 states and 14963 transitions. [2021-06-05 23:46:06,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:06,099 INFO L276 IsEmpty]: Start isEmpty. Operand 4492 states and 14963 transitions. [2021-06-05 23:46:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:06,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:06,105 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:06,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 23:46:06,306 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:06,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:06,307 INFO L82 PathProgramCache]: Analyzing trace with hash -574521669, now seen corresponding path program 59 times [2021-06-05 23:46:06,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:06,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283100534] [2021-06-05 23:46:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:06,593 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 23:46:06,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:06,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283100534] [2021-06-05 23:46:06,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283100534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:06,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725136419] [2021-06-05 23:46:06,594 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 23:46:06,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:46:06,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:06,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:46:06,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:06,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:06,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:46:06,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:06,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:06,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:06,861 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:46:06,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:06,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:06,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:06,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:46:06,889 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 23:46:06,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725136419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:06,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:06,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 23:46:06,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918938301] [2021-06-05 23:46:06,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:46:06,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:06,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:46:06,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:46:06,890 INFO L87 Difference]: Start difference. First operand 4492 states and 14963 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:07,355 INFO L93 Difference]: Finished difference Result 4660 states and 15406 transitions. [2021-06-05 23:46:07,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:46:07,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:07,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:07,363 INFO L225 Difference]: With dead ends: 4660 [2021-06-05 23:46:07,363 INFO L226 Difference]: Without dead ends: 4641 [2021-06-05 23:46:07,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 563.1ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:46:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-05 23:46:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 4480. [2021-06-05 23:46:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 3.3340031256977003) internal successors, (14933), 4479 states have internal predecessors, (14933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 14933 transitions. [2021-06-05 23:46:07,451 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 14933 transitions. Word has length 30 [2021-06-05 23:46:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:07,451 INFO L482 AbstractCegarLoop]: Abstraction has 4480 states and 14933 transitions. [2021-06-05 23:46:07,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 14933 transitions. [2021-06-05 23:46:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:07,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:07,457 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:07,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 23:46:07,657 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:07,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:07,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1112954235, now seen corresponding path program 60 times [2021-06-05 23:46:07,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:07,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84490211] [2021-06-05 23:46:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:07,929 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 23:46:07,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:07,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84490211] [2021-06-05 23:46:07,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84490211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:07,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614539829] [2021-06-05 23:46:07,930 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 23:46:07,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:46:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:46:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:08,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:08,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:08,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:46:08,151 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:08,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:08,158 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:46:08,160 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:08,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:08,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:08,167 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 23:46:08,212 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 23:46:08,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614539829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:08,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:08,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:46:08,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207730558] [2021-06-05 23:46:08,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:46:08,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:08,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:46:08,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:46:08,213 INFO L87 Difference]: Start difference. First operand 4480 states and 14933 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:09,504 INFO L93 Difference]: Finished difference Result 6076 states and 19915 transitions. [2021-06-05 23:46:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:46:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:09,514 INFO L225 Difference]: With dead ends: 6076 [2021-06-05 23:46:09,514 INFO L226 Difference]: Without dead ends: 6022 [2021-06-05 23:46:09,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1157.9ms TimeCoverageRelationStatistics Valid=371, Invalid=1699, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:46:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6022 states. [2021-06-05 23:46:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6022 to 4460. [2021-06-05 23:46:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 3.334155640278089) internal successors, (14867), 4459 states have internal predecessors, (14867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:09,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 14867 transitions. [2021-06-05 23:46:09,581 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 14867 transitions. Word has length 30 [2021-06-05 23:46:09,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:09,581 INFO L482 AbstractCegarLoop]: Abstraction has 4460 states and 14867 transitions. [2021-06-05 23:46:09,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 14867 transitions. [2021-06-05 23:46:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:09,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:09,587 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:09,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 23:46:09,787 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:09,788 INFO L82 PathProgramCache]: Analyzing trace with hash -542795185, now seen corresponding path program 61 times [2021-06-05 23:46:09,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:09,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307240131] [2021-06-05 23:46:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:10,037 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 23:46:10,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:10,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307240131] [2021-06-05 23:46:10,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307240131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:10,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284328091] [2021-06-05 23:46:10,038 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 23:46:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:10,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:46:10,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:10,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:10,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:10,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:46:10,231 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:10,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:10,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:46:10,241 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:10,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:10,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:10,247 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 23:46:10,308 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 23:46:10,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284328091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:10,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:10,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:46:10,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309120988] [2021-06-05 23:46:10,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:10,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:10,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:10,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:10,309 INFO L87 Difference]: Start difference. First operand 4460 states and 14867 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:11,895 INFO L93 Difference]: Finished difference Result 6241 states and 20491 transitions. [2021-06-05 23:46:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:46:11,895 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:11,907 INFO L225 Difference]: With dead ends: 6241 [2021-06-05 23:46:11,907 INFO L226 Difference]: Without dead ends: 6216 [2021-06-05 23:46:11,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1327.1ms TimeCoverageRelationStatistics Valid=432, Invalid=2430, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:46:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6216 states. [2021-06-05 23:46:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6216 to 4433. [2021-06-05 23:46:11,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4432 states have (on average 3.3334837545126352) internal successors, (14774), 4432 states have internal predecessors, (14774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 14774 transitions. [2021-06-05 23:46:11,982 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 14774 transitions. Word has length 30 [2021-06-05 23:46:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:11,982 INFO L482 AbstractCegarLoop]: Abstraction has 4433 states and 14774 transitions. [2021-06-05 23:46:11,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 14774 transitions. [2021-06-05 23:46:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:11,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:11,988 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:12,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 23:46:12,196 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1116925583, now seen corresponding path program 62 times [2021-06-05 23:46:12,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:12,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903129037] [2021-06-05 23:46:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:12,440 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 23:46:12,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:12,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903129037] [2021-06-05 23:46:12,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903129037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:12,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308833208] [2021-06-05 23:46:12,441 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 23:46:12,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:12,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:12,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:46:12,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:12,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:12,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:12,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:46:12,627 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:12,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:12,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:46:12,641 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:12,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:12,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:12,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 23:46:12,723 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 23:46:12,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308833208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:12,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:12,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:46:12,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67041989] [2021-06-05 23:46:12,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:12,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:12,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:12,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:12,724 INFO L87 Difference]: Start difference. First operand 4433 states and 14774 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:13,965 INFO L93 Difference]: Finished difference Result 6004 states and 19715 transitions. [2021-06-05 23:46:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:46:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:13,975 INFO L225 Difference]: With dead ends: 6004 [2021-06-05 23:46:13,975 INFO L226 Difference]: Without dead ends: 5954 [2021-06-05 23:46:13,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1152.1ms TimeCoverageRelationStatistics Valid=361, Invalid=1801, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:46:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5954 states. [2021-06-05 23:46:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5954 to 4399. [2021-06-05 23:46:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 3.330150068212824) internal successors, (14646), 4398 states have internal predecessors, (14646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 14646 transitions. [2021-06-05 23:46:14,040 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 14646 transitions. Word has length 30 [2021-06-05 23:46:14,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:14,040 INFO L482 AbstractCegarLoop]: Abstraction has 4399 states and 14646 transitions. [2021-06-05 23:46:14,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 14646 transitions. [2021-06-05 23:46:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:14,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:14,045 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:14,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:14,246 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1426617695, now seen corresponding path program 63 times [2021-06-05 23:46:14,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:14,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048902231] [2021-06-05 23:46:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:14,455 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 23:46:14,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048902231] [2021-06-05 23:46:14,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048902231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145025366] [2021-06-05 23:46:14,455 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 23:46:14,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:46:14,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:14,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:46:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:14,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:14,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:14,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:46:14,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:14,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:14,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:14,770 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:46:14,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:14,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:14,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:14,777 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-06-05 23:46:14,792 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 23:46:14,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145025366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:14,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:14,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:46:14,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713837854] [2021-06-05 23:46:14,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:46:14,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:14,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:46:14,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:46:14,792 INFO L87 Difference]: Start difference. First operand 4399 states and 14646 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:15,477 INFO L93 Difference]: Finished difference Result 5475 states and 17962 transitions. [2021-06-05 23:46:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:46:15,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:15,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:15,486 INFO L225 Difference]: With dead ends: 5475 [2021-06-05 23:46:15,486 INFO L226 Difference]: Without dead ends: 5454 [2021-06-05 23:46:15,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 687.5ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:46:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5454 states. [2021-06-05 23:46:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5454 to 4423. [2021-06-05 23:46:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 3.3290366350067844) internal successors, (14721), 4422 states have internal predecessors, (14721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 14721 transitions. [2021-06-05 23:46:15,546 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 14721 transitions. Word has length 30 [2021-06-05 23:46:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:15,546 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 14721 transitions. [2021-06-05 23:46:15,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 14721 transitions. [2021-06-05 23:46:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:15,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:15,551 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:15,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:15,752 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:15,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:15,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1037743381, now seen corresponding path program 64 times [2021-06-05 23:46:15,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:15,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039892592] [2021-06-05 23:46:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:15,985 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 23:46:15,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:15,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039892592] [2021-06-05 23:46:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039892592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:15,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104553660] [2021-06-05 23:46:15,985 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 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 23:46:16,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:46:16,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:16,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:46:16,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:16,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:16,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:46:16,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:16,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:16,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:16,243 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:46:16,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:16,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:16,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:16,249 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:46:16,270 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 23:46:16,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104553660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:16,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:16,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:46:16,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089662810] [2021-06-05 23:46:16,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:46:16,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:16,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:46:16,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:46:16,271 INFO L87 Difference]: Start difference. First operand 4423 states and 14721 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:16,813 INFO L93 Difference]: Finished difference Result 5366 states and 17669 transitions. [2021-06-05 23:46:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:46:16,813 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:16,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:16,821 INFO L225 Difference]: With dead ends: 5366 [2021-06-05 23:46:16,821 INFO L226 Difference]: Without dead ends: 5347 [2021-06-05 23:46:16,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2021-06-05 23:46:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 4441. [2021-06-05 23:46:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4441 states, 4440 states have (on average 3.332882882882883) internal successors, (14798), 4440 states have internal predecessors, (14798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4441 states to 4441 states and 14798 transitions. [2021-06-05 23:46:16,900 INFO L78 Accepts]: Start accepts. Automaton has 4441 states and 14798 transitions. Word has length 30 [2021-06-05 23:46:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:16,900 INFO L482 AbstractCegarLoop]: Abstraction has 4441 states and 14798 transitions. [2021-06-05 23:46:16,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4441 states and 14798 transitions. [2021-06-05 23:46:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:16,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:16,906 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:17,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 23:46:17,106 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:17,107 INFO L82 PathProgramCache]: Analyzing trace with hash -346404441, now seen corresponding path program 65 times [2021-06-05 23:46:17,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:17,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232273961] [2021-06-05 23:46:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:17,350 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 23:46:17,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:17,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232273961] [2021-06-05 23:46:17,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232273961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:17,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529760830] [2021-06-05 23:46:17,351 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 23:46:17,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:46:17,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:46:17,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:17,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:17,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:17,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:46:17,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:17,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:17,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:17,647 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:46:17,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:46:17,648 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:17,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:46:17,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:17,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:17,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:17,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:17,672 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:43, output treesize:47 [2021-06-05 23:46:17,880 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 23:46:17,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529760830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:17,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:17,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 23:46:17,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375939277] [2021-06-05 23:46:17,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:46:17,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:46:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:46:17,881 INFO L87 Difference]: Start difference. First operand 4441 states and 14798 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:19,713 INFO L93 Difference]: Finished difference Result 6019 states and 19674 transitions. [2021-06-05 23:46:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:46:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:19,721 INFO L225 Difference]: With dead ends: 6019 [2021-06-05 23:46:19,721 INFO L226 Difference]: Without dead ends: 5950 [2021-06-05 23:46:19,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1720.1ms TimeCoverageRelationStatistics Valid=350, Invalid=2200, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:46:19,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5950 states. [2021-06-05 23:46:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5950 to 4431. [2021-06-05 23:46:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4431 states, 4430 states have (on average 3.3293453724604967) internal successors, (14749), 4430 states have internal predecessors, (14749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 14749 transitions. [2021-06-05 23:46:19,787 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 14749 transitions. Word has length 30 [2021-06-05 23:46:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:19,787 INFO L482 AbstractCegarLoop]: Abstraction has 4431 states and 14749 transitions. [2021-06-05 23:46:19,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 14749 transitions. [2021-06-05 23:46:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:19,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:19,792 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:19,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-05 23:46:19,993 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:19,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:19,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1082189491, now seen corresponding path program 66 times [2021-06-05 23:46:19,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:19,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70384160] [2021-06-05 23:46:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:20,219 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 23:46:20,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:20,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70384160] [2021-06-05 23:46:20,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70384160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:20,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952399790] [2021-06-05 23:46:20,219 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 23:46:20,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:46:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:20,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:46:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:20,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:20,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:46:20,413 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:20,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:20,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:46:20,422 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:20,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:20,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:20,429 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 23:46:20,496 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 23:46:20,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952399790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:20,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:20,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:46:20,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18250927] [2021-06-05 23:46:20,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:46:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:46:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:46:20,497 INFO L87 Difference]: Start difference. First operand 4431 states and 14749 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:20,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:20,852 INFO L93 Difference]: Finished difference Result 5416 states and 17889 transitions. [2021-06-05 23:46:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:46:20,852 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:20,860 INFO L225 Difference]: With dead ends: 5416 [2021-06-05 23:46:20,860 INFO L226 Difference]: Without dead ends: 5391 [2021-06-05 23:46:20,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:46:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5391 states. [2021-06-05 23:46:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5391 to 4423. [2021-06-05 23:46:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 3.3290366350067844) internal successors, (14721), 4422 states have internal predecessors, (14721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 14721 transitions. [2021-06-05 23:46:20,921 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 14721 transitions. Word has length 30 [2021-06-05 23:46:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:20,921 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 14721 transitions. [2021-06-05 23:46:20,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:20,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 14721 transitions. [2021-06-05 23:46:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:20,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:20,926 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:21,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:21,127 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1918733807, now seen corresponding path program 67 times [2021-06-05 23:46:21,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:21,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322790254] [2021-06-05 23:46:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:21,371 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 23:46:21,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322790254] [2021-06-05 23:46:21,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322790254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123144289] [2021-06-05 23:46:21,372 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 23:46:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:21,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:46:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:21,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:21,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:21,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:46:21,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:21,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:21,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:21,652 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:46:21,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:21,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:21,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:21,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:46:21,678 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 23:46:21,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123144289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:21,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:21,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:46:21,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493604882] [2021-06-05 23:46:21,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:46:21,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:46:21,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:46:21,679 INFO L87 Difference]: Start difference. First operand 4423 states and 14721 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:22,527 INFO L93 Difference]: Finished difference Result 5299 states and 17429 transitions. [2021-06-05 23:46:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:46:22,527 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:22,534 INFO L225 Difference]: With dead ends: 5299 [2021-06-05 23:46:22,534 INFO L226 Difference]: Without dead ends: 5280 [2021-06-05 23:46:22,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 862.5ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:46:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-06-05 23:46:22,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4431. [2021-06-05 23:46:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4431 states, 4430 states have (on average 3.3311512415349886) internal successors, (14757), 4430 states have internal predecessors, (14757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 14757 transitions. [2021-06-05 23:46:22,593 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 14757 transitions. Word has length 30 [2021-06-05 23:46:22,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:22,593 INFO L482 AbstractCegarLoop]: Abstraction has 4431 states and 14757 transitions. [2021-06-05 23:46:22,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 14757 transitions. [2021-06-05 23:46:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:22,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:22,598 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:22,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 23:46:22,798 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:22,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1684894549, now seen corresponding path program 68 times [2021-06-05 23:46:22,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:22,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155770616] [2021-06-05 23:46:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:23,103 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 23:46:23,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:23,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155770616] [2021-06-05 23:46:23,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155770616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:23,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014262499] [2021-06-05 23:46:23,103 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 23:46:23,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:23,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:46:23,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:23,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:23,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:46:23,348 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:23,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:23,357 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:46:23,358 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:23,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:23,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:23,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:19 [2021-06-05 23:46:23,414 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 23:46:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014262499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:23,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:23,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:46:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845605272] [2021-06-05 23:46:23,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:23,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:23,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:23,415 INFO L87 Difference]: Start difference. First operand 4431 states and 14757 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:24,870 INFO L93 Difference]: Finished difference Result 6243 states and 20314 transitions. [2021-06-05 23:46:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:46:24,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:24,879 INFO L225 Difference]: With dead ends: 6243 [2021-06-05 23:46:24,879 INFO L226 Difference]: Without dead ends: 6193 [2021-06-05 23:46:24,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1435.5ms TimeCoverageRelationStatistics Valid=458, Invalid=2298, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:46:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6193 states. [2021-06-05 23:46:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6193 to 4426. [2021-06-05 23:46:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 3.329491525423729) internal successors, (14733), 4425 states have internal predecessors, (14733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 14733 transitions. [2021-06-05 23:46:24,947 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 14733 transitions. Word has length 30 [2021-06-05 23:46:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:24,947 INFO L482 AbstractCegarLoop]: Abstraction has 4426 states and 14733 transitions. [2021-06-05 23:46:24,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 14733 transitions. [2021-06-05 23:46:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:24,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:24,952 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:25,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 23:46:25,152 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:25,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:25,152 INFO L82 PathProgramCache]: Analyzing trace with hash -856770197, now seen corresponding path program 69 times [2021-06-05 23:46:25,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:25,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435392965] [2021-06-05 23:46:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:25,410 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 23:46:25,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:25,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435392965] [2021-06-05 23:46:25,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435392965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:25,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285863078] [2021-06-05 23:46:25,411 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 23:46:25,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:46:25,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:25,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:46:25,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:25,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:25,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:25,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:46:25,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:25,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:25,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:25,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:46:25,674 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:25,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:25,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:25,705 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:46:25,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:46:25,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:25,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:25,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:25,725 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:40, output treesize:57 [2021-06-05 23:46:25,851 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 23:46:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285863078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:25,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:25,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:46:25,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033497802] [2021-06-05 23:46:25,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:25,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:25,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:25,852 INFO L87 Difference]: Start difference. First operand 4426 states and 14733 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:27,365 INFO L93 Difference]: Finished difference Result 5023 states and 16626 transitions. [2021-06-05 23:46:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:46:27,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:27,373 INFO L225 Difference]: With dead ends: 5023 [2021-06-05 23:46:27,373 INFO L226 Difference]: Without dead ends: 4994 [2021-06-05 23:46:27,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1473.8ms TimeCoverageRelationStatistics Valid=343, Invalid=1913, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:46:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2021-06-05 23:46:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4443. [2021-06-05 23:46:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4442 states have (on average 3.330706888788834) internal successors, (14795), 4442 states have internal predecessors, (14795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 14795 transitions. [2021-06-05 23:46:27,429 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 14795 transitions. Word has length 30 [2021-06-05 23:46:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:27,430 INFO L482 AbstractCegarLoop]: Abstraction has 4443 states and 14795 transitions. [2021-06-05 23:46:27,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 14795 transitions. [2021-06-05 23:46:27,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:27,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:27,435 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:27,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 23:46:27,635 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:27,635 INFO L82 PathProgramCache]: Analyzing trace with hash 505841331, now seen corresponding path program 70 times [2021-06-05 23:46:27,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:27,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021145141] [2021-06-05 23:46:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:27,876 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 23:46:27,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:27,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021145141] [2021-06-05 23:46:27,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021145141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:27,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007678056] [2021-06-05 23:46:27,876 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 23:46:27,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:46:27,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:27,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:46:27,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:28,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:28,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:28,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:46:28,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:28,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:28,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:28,122 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:46:28,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:28,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:28,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:28,127 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:46:28,149 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 23:46:28,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007678056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:28,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:28,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:46:28,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505862332] [2021-06-05 23:46:28,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:28,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:28,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:28,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:28,150 INFO L87 Difference]: Start difference. First operand 4443 states and 14795 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:29,255 INFO L93 Difference]: Finished difference Result 5778 states and 18969 transitions. [2021-06-05 23:46:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:46:29,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:29,264 INFO L225 Difference]: With dead ends: 5778 [2021-06-05 23:46:29,264 INFO L226 Difference]: Without dead ends: 5763 [2021-06-05 23:46:29,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1044.2ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:46:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-06-05 23:46:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 4446. [2021-06-05 23:46:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4446 states, 4445 states have (on average 3.3304836895388075) internal successors, (14804), 4445 states have internal predecessors, (14804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4446 states to 4446 states and 14804 transitions. [2021-06-05 23:46:29,327 INFO L78 Accepts]: Start accepts. Automaton has 4446 states and 14804 transitions. Word has length 30 [2021-06-05 23:46:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:29,327 INFO L482 AbstractCegarLoop]: Abstraction has 4446 states and 14804 transitions. [2021-06-05 23:46:29,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4446 states and 14804 transitions. [2021-06-05 23:46:29,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:29,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:29,332 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:29,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 23:46:29,533 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:29,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:29,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1319036757, now seen corresponding path program 71 times [2021-06-05 23:46:29,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:29,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178749980] [2021-06-05 23:46:29,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:29,732 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 23:46:29,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:29,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178749980] [2021-06-05 23:46:29,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178749980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:29,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838269400] [2021-06-05 23:46:29,733 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 23:46:29,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:46:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:46:29,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:29,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:29,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:30,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:46:30,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:30,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:30,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:30,009 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:46:30,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:30,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:30,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:30,015 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:46:30,036 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 23:46:30,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838269400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:30,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:30,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:46:30,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859061336] [2021-06-05 23:46:30,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:46:30,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:30,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:46:30,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:46:30,037 INFO L87 Difference]: Start difference. First operand 4446 states and 14804 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:31,068 INFO L93 Difference]: Finished difference Result 5990 states and 19727 transitions. [2021-06-05 23:46:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:46:31,069 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:31,077 INFO L225 Difference]: With dead ends: 5990 [2021-06-05 23:46:31,077 INFO L226 Difference]: Without dead ends: 5965 [2021-06-05 23:46:31,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 912.2ms TimeCoverageRelationStatistics Valid=339, Invalid=1553, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:46:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2021-06-05 23:46:31,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 4487. [2021-06-05 23:46:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4487 states, 4486 states have (on average 3.3314757021845742) internal successors, (14945), 4486 states have internal predecessors, (14945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4487 states to 4487 states and 14945 transitions. [2021-06-05 23:46:31,165 INFO L78 Accepts]: Start accepts. Automaton has 4487 states and 14945 transitions. Word has length 30 [2021-06-05 23:46:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:31,165 INFO L482 AbstractCegarLoop]: Abstraction has 4487 states and 14945 transitions. [2021-06-05 23:46:31,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4487 states and 14945 transitions. [2021-06-05 23:46:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:31,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:31,170 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:31,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 23:46:31,370 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:31,371 INFO L82 PathProgramCache]: Analyzing trace with hash -306833109, now seen corresponding path program 72 times [2021-06-05 23:46:31,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:31,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354922057] [2021-06-05 23:46:31,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:31,562 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 23:46:31,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354922057] [2021-06-05 23:46:31,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354922057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593608661] [2021-06-05 23:46:31,563 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 23:46:31,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:46:31,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:31,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:46:31,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:31,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:31,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:46:31,753 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:31,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:31,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:46:31,762 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:31,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:31,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:31,769 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 23:46:31,831 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 23:46:31,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593608661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:31,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:31,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:46:31,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863226524] [2021-06-05 23:46:31,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:31,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:31,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:31,832 INFO L87 Difference]: Start difference. First operand 4487 states and 14945 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:33,095 INFO L93 Difference]: Finished difference Result 5755 states and 18965 transitions. [2021-06-05 23:46:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:46:33,096 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:33,104 INFO L225 Difference]: With dead ends: 5755 [2021-06-05 23:46:33,104 INFO L226 Difference]: Without dead ends: 5730 [2021-06-05 23:46:33,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1037.2ms TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:46:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2021-06-05 23:46:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 4505. [2021-06-05 23:46:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4504 states have (on average 3.330373001776199) internal successors, (15000), 4504 states have internal predecessors, (15000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 15000 transitions. [2021-06-05 23:46:33,169 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 15000 transitions. Word has length 30 [2021-06-05 23:46:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:33,169 INFO L482 AbstractCegarLoop]: Abstraction has 4505 states and 15000 transitions. [2021-06-05 23:46:33,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 15000 transitions. [2021-06-05 23:46:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:33,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:33,174 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:33,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 23:46:33,377 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1957101545, now seen corresponding path program 73 times [2021-06-05 23:46:33,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:33,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475336431] [2021-06-05 23:46:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:33,617 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 23:46:33,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:33,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475336431] [2021-06-05 23:46:33,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475336431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:33,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297579678] [2021-06-05 23:46:33,618 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 23:46:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:33,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:46:33,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:33,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:33,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:33,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:46:33,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:33,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:33,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:33,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:46:33,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:33,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:33,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:33,897 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:46:33,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:46:33,898 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:33,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:33,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:33,917 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:44 [2021-06-05 23:46:34,041 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 23:46:34,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297579678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:34,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:34,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:46:34,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153196777] [2021-06-05 23:46:34,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:34,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:34,042 INFO L87 Difference]: Start difference. First operand 4505 states and 15000 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:35,211 INFO L93 Difference]: Finished difference Result 5965 states and 19612 transitions. [2021-06-05 23:46:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:46:35,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:35,220 INFO L225 Difference]: With dead ends: 5965 [2021-06-05 23:46:35,220 INFO L226 Difference]: Without dead ends: 5940 [2021-06-05 23:46:35,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1144.1ms TimeCoverageRelationStatistics Valid=359, Invalid=1447, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:46:35,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5940 states. [2021-06-05 23:46:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5940 to 4529. [2021-06-05 23:46:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 3.329505300353357) internal successors, (15076), 4528 states have internal predecessors, (15076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 15076 transitions. [2021-06-05 23:46:35,290 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 15076 transitions. Word has length 30 [2021-06-05 23:46:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:35,290 INFO L482 AbstractCegarLoop]: Abstraction has 4529 states and 15076 transitions. [2021-06-05 23:46:35,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 15076 transitions. [2021-06-05 23:46:35,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:35,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:35,296 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:35,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 23:46:35,497 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:35,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:35,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1902237233, now seen corresponding path program 74 times [2021-06-05 23:46:35,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:35,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31123932] [2021-06-05 23:46:35,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:35,706 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 23:46:35,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:35,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31123932] [2021-06-05 23:46:35,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31123932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:35,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624809985] [2021-06-05 23:46:35,706 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 23:46:35,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:35,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:35,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:46:35,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:35,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:35,921 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 23:46:35,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 147 treesize of output 132 [2021-06-05 23:46:35,923 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:35,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:35,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:46:35,933 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:35,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:35,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:35,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:150, output treesize:15 [2021-06-05 23:46:36,012 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 23:46:36,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624809985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:36,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:36,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:46:36,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402593906] [2021-06-05 23:46:36,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:36,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:36,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:36,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:36,013 INFO L87 Difference]: Start difference. First operand 4529 states and 15076 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:37,193 INFO L93 Difference]: Finished difference Result 6048 states and 19898 transitions. [2021-06-05 23:46:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:46:37,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:37,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:37,203 INFO L225 Difference]: With dead ends: 6048 [2021-06-05 23:46:37,203 INFO L226 Difference]: Without dead ends: 5998 [2021-06-05 23:46:37,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1051.2ms TimeCoverageRelationStatistics Valid=361, Invalid=1801, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:46:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5998 states. [2021-06-05 23:46:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5998 to 4551. [2021-06-05 23:46:37,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4551 states, 4550 states have (on average 3.3294505494505495) internal successors, (15149), 4550 states have internal predecessors, (15149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4551 states to 4551 states and 15149 transitions. [2021-06-05 23:46:37,271 INFO L78 Accepts]: Start accepts. Automaton has 4551 states and 15149 transitions. Word has length 30 [2021-06-05 23:46:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:37,271 INFO L482 AbstractCegarLoop]: Abstraction has 4551 states and 15149 transitions. [2021-06-05 23:46:37,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:37,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4551 states and 15149 transitions. [2021-06-05 23:46:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:37,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:37,277 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:37,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2021-06-05 23:46:37,477 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:37,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1887064679, now seen corresponding path program 75 times [2021-06-05 23:46:37,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:37,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096427114] [2021-06-05 23:46:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:37,709 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 23:46:37,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:37,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096427114] [2021-06-05 23:46:37,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096427114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:37,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799744759] [2021-06-05 23:46:37,709 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 23:46:37,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:46:37,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:37,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:46:37,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:37,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:37,945 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-06-05 23:46:37,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:37,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:38,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:38,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 23:46:38,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:38,045 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-06-05 23:46:38,046 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 69 [2021-06-05 23:46:38,062 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:38,134 INFO L628 ElimStorePlain]: treesize reduction 148, result has 27.8 percent of original size [2021-06-05 23:46:38,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:38,145 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:44, output treesize:188 [2021-06-05 23:46:38,296 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 23:46:38,519 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 23:46:38,666 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 23:46:38,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799744759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:38,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:38,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 23:46:38,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375823692] [2021-06-05 23:46:38,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:46:38,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:38,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:46:38,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:46:38,667 INFO L87 Difference]: Start difference. First operand 4551 states and 15149 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:39,222 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-05 23:46:40,258 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 23:46:40,464 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 37 [2021-06-05 23:46:40,745 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-05 23:46:42,188 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 23:46:42,340 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-06-05 23:46:43,036 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 23:46:43,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:43,254 INFO L93 Difference]: Finished difference Result 7065 states and 22984 transitions. [2021-06-05 23:46:43,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:46:43,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:43,264 INFO L225 Difference]: With dead ends: 7065 [2021-06-05 23:46:43,264 INFO L226 Difference]: Without dead ends: 7025 [2021-06-05 23:46:43,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 4285.7ms TimeCoverageRelationStatistics Valid=673, Invalid=4019, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:46:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7025 states. [2021-06-05 23:46:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7025 to 4594. [2021-06-05 23:46:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4594 states, 4593 states have (on average 3.334421946440235) internal successors, (15315), 4593 states have internal predecessors, (15315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4594 states to 4594 states and 15315 transitions. [2021-06-05 23:46:43,333 INFO L78 Accepts]: Start accepts. Automaton has 4594 states and 15315 transitions. Word has length 30 [2021-06-05 23:46:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:43,333 INFO L482 AbstractCegarLoop]: Abstraction has 4594 states and 15315 transitions. [2021-06-05 23:46:43,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4594 states and 15315 transitions. [2021-06-05 23:46:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:43,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:43,338 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:43,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 23:46:43,541 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:43,541 INFO L82 PathProgramCache]: Analyzing trace with hash -837912312, now seen corresponding path program 69 times [2021-06-05 23:46:43,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:43,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755883444] [2021-06-05 23:46:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:43,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:43,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755883444] [2021-06-05 23:46:43,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755883444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:43,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319365204] [2021-06-05 23:46:43,917 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 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 23:46:43,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:46:43,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:46:43,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:44,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:44,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:44,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:44,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 23:46:44,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:44,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:44,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:44,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:44,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:44,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:44,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:46:44,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:44,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:44,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:44,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:7 [2021-06-05 23:46:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:44,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319365204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:44,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:44,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:46:44,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078378188] [2021-06-05 23:46:44,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:44,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:44,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:44,199 INFO L87 Difference]: Start difference. First operand 4594 states and 15315 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:45,386 INFO L93 Difference]: Finished difference Result 5677 states and 18505 transitions. [2021-06-05 23:46:45,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:46:45,387 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:45,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:45,395 INFO L225 Difference]: With dead ends: 5677 [2021-06-05 23:46:45,395 INFO L226 Difference]: Without dead ends: 5651 [2021-06-05 23:46:45,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1269.3ms TimeCoverageRelationStatistics Valid=291, Invalid=1689, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:46:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-05 23:46:45,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4608. [2021-06-05 23:46:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4607 states have (on average 3.331886260039071) internal successors, (15350), 4607 states have internal predecessors, (15350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 15350 transitions. [2021-06-05 23:46:45,477 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 15350 transitions. Word has length 30 [2021-06-05 23:46:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:45,477 INFO L482 AbstractCegarLoop]: Abstraction has 4608 states and 15350 transitions. [2021-06-05 23:46:45,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 15350 transitions. [2021-06-05 23:46:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:45,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:45,482 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:45,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 23:46:45,683 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:45,683 INFO L82 PathProgramCache]: Analyzing trace with hash -921666706, now seen corresponding path program 70 times [2021-06-05 23:46:45,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:45,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841716322] [2021-06-05 23:46:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:45,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:45,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841716322] [2021-06-05 23:46:45,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841716322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:45,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973541809] [2021-06-05 23:46:45,966 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 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 23:46:45,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:46:45,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:46:45,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:46,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:46,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:46,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:46,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 23:46:46,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:46,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:46,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:46,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:46,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:46,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:46,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:46:46,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:46,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:46,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:46,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:7 [2021-06-05 23:46:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:46,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973541809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:46,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:46,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 23:46:46,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237849445] [2021-06-05 23:46:46,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:46:46,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:46,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:46:46,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:46:46,219 INFO L87 Difference]: Start difference. First operand 4608 states and 15350 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 23:46:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:47,423 INFO L93 Difference]: Finished difference Result 5816 states and 18619 transitions. [2021-06-05 23:46:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:46:47,423 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) Word has length 30 [2021-06-05 23:46:47,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:47,431 INFO L225 Difference]: With dead ends: 5816 [2021-06-05 23:46:47,432 INFO L226 Difference]: Without dead ends: 5771 [2021-06-05 23:46:47,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1029.9ms TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:46:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2021-06-05 23:46:47,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 4648. [2021-06-05 23:46:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 3.3268775554120937) internal successors, (15460), 4647 states have internal predecessors, (15460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 15460 transitions. [2021-06-05 23:46:47,500 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 15460 transitions. Word has length 30 [2021-06-05 23:46:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:47,500 INFO L482 AbstractCegarLoop]: Abstraction has 4648 states and 15460 transitions. [2021-06-05 23:46:47,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 23:46:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 15460 transitions. [2021-06-05 23:46:47,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:47,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:47,508 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:47,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 23:46:47,710 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:47,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:47,710 INFO L82 PathProgramCache]: Analyzing trace with hash -883904124, now seen corresponding path program 71 times [2021-06-05 23:46:47,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:47,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917113688] [2021-06-05 23:46:47,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:48,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:48,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917113688] [2021-06-05 23:46:48,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917113688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:48,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89535774] [2021-06-05 23:46:48,051 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 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 23:46:48,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:46:48,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:48,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:46:48,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:48,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:48,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:48,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:48,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:48,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 23:46:48,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:48,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:48,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:48,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:48,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:48,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:48,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:46:48,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:48,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:48,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:48,331 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:7 [2021-06-05 23:46:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:48,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89535774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:48,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:48,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 23:46:48,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789868033] [2021-06-05 23:46:48,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:46:48,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:48,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:46:48,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:46:48,362 INFO L87 Difference]: Start difference. First operand 4648 states and 15460 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:50,759 INFO L93 Difference]: Finished difference Result 5986 states and 19510 transitions. [2021-06-05 23:46:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:46:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:50,767 INFO L225 Difference]: With dead ends: 5986 [2021-06-05 23:46:50,768 INFO L226 Difference]: Without dead ends: 5944 [2021-06-05 23:46:50,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 2182.9ms TimeCoverageRelationStatistics Valid=750, Invalid=3540, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:46:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2021-06-05 23:46:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 4698. [2021-06-05 23:46:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4697 states have (on average 3.3202043857781565) internal successors, (15595), 4697 states have internal predecessors, (15595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:50,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 15595 transitions. [2021-06-05 23:46:50,828 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 15595 transitions. Word has length 30 [2021-06-05 23:46:50,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:50,828 INFO L482 AbstractCegarLoop]: Abstraction has 4698 states and 15595 transitions. [2021-06-05 23:46:50,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 15595 transitions. [2021-06-05 23:46:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:50,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:50,833 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:51,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 23:46:51,034 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:51,034 INFO L82 PathProgramCache]: Analyzing trace with hash -223557876, now seen corresponding path program 72 times [2021-06-05 23:46:51,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:51,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081859690] [2021-06-05 23:46:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:51,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:51,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081859690] [2021-06-05 23:46:51,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081859690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:51,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327232592] [2021-06-05 23:46:51,339 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 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 23:46:51,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:46:51,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:51,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:46:51,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:51,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:51,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:51,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:51,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:51,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 23:46:51,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:51,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:51,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:51,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:51,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:51,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:51,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:46:51,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:51,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:51,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:51,603 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:7 [2021-06-05 23:46:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:51,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327232592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:51,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:51,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 23:46:51,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001802192] [2021-06-05 23:46:51,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:46:51,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:51,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:46:51,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:46:51,626 INFO L87 Difference]: Start difference. First operand 4698 states and 15595 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:53,416 INFO L93 Difference]: Finished difference Result 5808 states and 18957 transitions. [2021-06-05 23:46:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:46:53,416 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:53,424 INFO L225 Difference]: With dead ends: 5808 [2021-06-05 23:46:53,424 INFO L226 Difference]: Without dead ends: 5770 [2021-06-05 23:46:53,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1620.1ms TimeCoverageRelationStatistics Valid=480, Invalid=2382, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:46:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2021-06-05 23:46:53,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 4714. [2021-06-05 23:46:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4714 states, 4713 states have (on average 3.3178442605559093) internal successors, (15637), 4713 states have internal predecessors, (15637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 15637 transitions. [2021-06-05 23:46:53,487 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 15637 transitions. Word has length 30 [2021-06-05 23:46:53,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:53,487 INFO L482 AbstractCegarLoop]: Abstraction has 4714 states and 15637 transitions. [2021-06-05 23:46:53,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:53,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 15637 transitions. [2021-06-05 23:46:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:53,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:53,492 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:53,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:53,693 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:53,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1914731034, now seen corresponding path program 73 times [2021-06-05 23:46:53,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:53,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708624280] [2021-06-05 23:46:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:54,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:54,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708624280] [2021-06-05 23:46:54,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708624280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:54,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646477530] [2021-06-05 23:46:54,048 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 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 23:46:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:46:54,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:54,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:54,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:54,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:54,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:54,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 23:46:54,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:54,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:54,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:54,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:54,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:54,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:46:54,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:54,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:54,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:54,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:7 [2021-06-05 23:46:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:54,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646477530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:54,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:54,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 23:46:54,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214681996] [2021-06-05 23:46:54,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:46:54,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:54,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:46:54,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:46:54,311 INFO L87 Difference]: Start difference. First operand 4714 states and 15637 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:55,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:55,949 INFO L93 Difference]: Finished difference Result 5746 states and 18695 transitions. [2021-06-05 23:46:55,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:46:55,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:55,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:55,958 INFO L225 Difference]: With dead ends: 5746 [2021-06-05 23:46:55,958 INFO L226 Difference]: Without dead ends: 5720 [2021-06-05 23:46:55,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1540.6ms TimeCoverageRelationStatistics Valid=475, Invalid=2495, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:46:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5720 states. [2021-06-05 23:46:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5720 to 4726. [2021-06-05 23:46:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4726 states, 4725 states have (on average 3.315767195767196) internal successors, (15667), 4725 states have internal predecessors, (15667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:56,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4726 states to 4726 states and 15667 transitions. [2021-06-05 23:46:56,022 INFO L78 Accepts]: Start accepts. Automaton has 4726 states and 15667 transitions. Word has length 30 [2021-06-05 23:46:56,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:56,022 INFO L482 AbstractCegarLoop]: Abstraction has 4726 states and 15667 transitions. [2021-06-05 23:46:56,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:56,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4726 states and 15667 transitions. [2021-06-05 23:46:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:56,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:56,028 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:56,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:56,228 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1952493616, now seen corresponding path program 74 times [2021-06-05 23:46:56,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:56,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18281174] [2021-06-05 23:46:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:56,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:56,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18281174] [2021-06-05 23:46:56,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18281174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:56,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381560799] [2021-06-05 23:46:56,573 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 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 23:46:56,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:56,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:56,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:46:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:56,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:56,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:56,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:56,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 23:46:56,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:56,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:56,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:56,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:56,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:56,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:56,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2021-06-05 23:46:56,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:56,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:56,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:56,872 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:16 [2021-06-05 23:46:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:56,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381560799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:56,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:56,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:46:56,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65455572] [2021-06-05 23:46:56,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:46:56,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:56,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:46:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:46:56,919 INFO L87 Difference]: Start difference. First operand 4726 states and 15667 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:59,033 INFO L93 Difference]: Finished difference Result 6033 states and 19646 transitions. [2021-06-05 23:46:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:46:59,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:59,042 INFO L225 Difference]: With dead ends: 6033 [2021-06-05 23:46:59,042 INFO L226 Difference]: Without dead ends: 5992 [2021-06-05 23:46:59,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1889.9ms TimeCoverageRelationStatistics Valid=599, Invalid=3561, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:46:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5992 states. [2021-06-05 23:46:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5992 to 4730. [2021-06-05 23:46:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4729 states have (on average 3.3150771833368577) internal successors, (15677), 4729 states have internal predecessors, (15677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 15677 transitions. [2021-06-05 23:46:59,106 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 15677 transitions. Word has length 30 [2021-06-05 23:46:59,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:59,106 INFO L482 AbstractCegarLoop]: Abstraction has 4730 states and 15677 transitions. [2021-06-05 23:46:59,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 15677 transitions. [2021-06-05 23:46:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:59,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:59,111 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:59,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:59,311 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:59,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1715642334, now seen corresponding path program 75 times [2021-06-05 23:46:59,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:59,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291086353] [2021-06-05 23:46:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:59,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:59,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291086353] [2021-06-05 23:46:59,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291086353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:59,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60843318] [2021-06-05 23:46:59,715 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 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 23:46:59,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:46:59,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:59,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:46:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:00,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:00,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:00,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:00,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:00,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:47:00,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:00,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:00,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:00,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:00,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:00,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:00,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:47:00,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:00,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:00,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:00,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:47:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:00,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60843318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:00,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:00,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:47:00,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043230505] [2021-06-05 23:47:00,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:47:00,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:00,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:47:00,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:47:00,103 INFO L87 Difference]: Start difference. First operand 4730 states and 15677 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:01,696 INFO L93 Difference]: Finished difference Result 5788 states and 18895 transitions. [2021-06-05 23:47:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:47:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:01,704 INFO L225 Difference]: With dead ends: 5788 [2021-06-05 23:47:01,704 INFO L226 Difference]: Without dead ends: 5762 [2021-06-05 23:47:01,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1504.5ms TimeCoverageRelationStatistics Valid=357, Invalid=2505, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:47:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5762 states. [2021-06-05 23:47:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5762 to 4764. [2021-06-05 23:47:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4764 states, 4763 states have (on average 3.312828049548604) internal successors, (15779), 4763 states have internal predecessors, (15779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4764 states to 4764 states and 15779 transitions. [2021-06-05 23:47:01,770 INFO L78 Accepts]: Start accepts. Automaton has 4764 states and 15779 transitions. Word has length 30 [2021-06-05 23:47:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:01,770 INFO L482 AbstractCegarLoop]: Abstraction has 4764 states and 15779 transitions. [2021-06-05 23:47:01,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4764 states and 15779 transitions. [2021-06-05 23:47:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:01,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:01,775 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:01,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:01,976 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:01,976 INFO L82 PathProgramCache]: Analyzing trace with hash -457768782, now seen corresponding path program 76 times [2021-06-05 23:47:01,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:01,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202264046] [2021-06-05 23:47:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:02,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:02,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202264046] [2021-06-05 23:47:02,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202264046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:02,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186466930] [2021-06-05 23:47:02,327 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 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 23:47:02,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:47:02,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:02,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:47:02,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:02,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:02,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:02,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:02,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:02,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 23:47:02,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:02,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:02,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:02,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:02,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:02,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:02,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:47:02,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:02,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:02,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:02,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:7 [2021-06-05 23:47:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:02,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186466930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:02,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:02,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 23:47:02,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049325668] [2021-06-05 23:47:02,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:47:02,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:47:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:47:02,597 INFO L87 Difference]: Start difference. First operand 4764 states and 15779 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:03,660 INFO L93 Difference]: Finished difference Result 5694 states and 18592 transitions. [2021-06-05 23:47:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:47:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:03,668 INFO L225 Difference]: With dead ends: 5694 [2021-06-05 23:47:03,668 INFO L226 Difference]: Without dead ends: 5679 [2021-06-05 23:47:03,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1138.5ms TimeCoverageRelationStatistics Valid=309, Invalid=1583, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:47:03,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5679 states. [2021-06-05 23:47:03,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5679 to 4762. [2021-06-05 23:47:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.313169502205419) internal successors, (15774), 4761 states have internal predecessors, (15774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 15774 transitions. [2021-06-05 23:47:03,728 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 15774 transitions. Word has length 30 [2021-06-05 23:47:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:03,728 INFO L482 AbstractCegarLoop]: Abstraction has 4762 states and 15774 transitions. [2021-06-05 23:47:03,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 15774 transitions. [2021-06-05 23:47:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:03,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:03,733 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:03,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:03,934 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:03,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:03,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1687917273, now seen corresponding path program 76 times [2021-06-05 23:47:03,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:03,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883539410] [2021-06-05 23:47:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:04,256 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 23:47:04,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:04,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883539410] [2021-06-05 23:47:04,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883539410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:04,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803820337] [2021-06-05 23:47:04,257 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 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 23:47:04,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:47:04,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:04,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:47:04,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:04,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:04,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:04,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:47:04,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:04,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:04,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:04,526 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:47:04,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:04,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:04,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:04,533 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-06-05 23:47:04,550 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 23:47:04,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803820337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:04,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:04,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:47:04,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837422265] [2021-06-05 23:47:04,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:47:04,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:47:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:47:04,551 INFO L87 Difference]: Start difference. First operand 4762 states and 15774 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:05,850 INFO L93 Difference]: Finished difference Result 6270 states and 20288 transitions. [2021-06-05 23:47:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:47:05,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:05,859 INFO L225 Difference]: With dead ends: 6270 [2021-06-05 23:47:05,859 INFO L226 Difference]: Without dead ends: 6255 [2021-06-05 23:47:05,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1261.3ms TimeCoverageRelationStatistics Valid=362, Invalid=1360, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:47:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6255 states. [2021-06-05 23:47:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6255 to 4794. [2021-06-05 23:47:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4794 states, 4793 states have (on average 3.3154600459002714) internal successors, (15891), 4793 states have internal predecessors, (15891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4794 states to 4794 states and 15891 transitions. [2021-06-05 23:47:05,929 INFO L78 Accepts]: Start accepts. Automaton has 4794 states and 15891 transitions. Word has length 30 [2021-06-05 23:47:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:05,929 INFO L482 AbstractCegarLoop]: Abstraction has 4794 states and 15891 transitions. [2021-06-05 23:47:05,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4794 states and 15891 transitions. [2021-06-05 23:47:05,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:05,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:05,935 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:06,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:06,135 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:06,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:06,136 INFO L82 PathProgramCache]: Analyzing trace with hash 126443310, now seen corresponding path program 77 times [2021-06-05 23:47:06,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:06,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246941473] [2021-06-05 23:47:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:06,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:06,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246941473] [2021-06-05 23:47:06,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246941473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:06,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681888461] [2021-06-05 23:47:06,344 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 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 23:47:06,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:47:06,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:06,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:47:06,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:06,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:06,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:06,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:06,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:06,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:47:06,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:06,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:06,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:06,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:06,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:06,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:06,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:47:06,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:06,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:06,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:06,597 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:47:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:06,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681888461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:06,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:06,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:47:06,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849162003] [2021-06-05 23:47:06,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:06,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:06,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:06,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:06,614 INFO L87 Difference]: Start difference. First operand 4794 states and 15891 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:08,120 INFO L93 Difference]: Finished difference Result 6527 states and 20810 transitions. [2021-06-05 23:47:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:47:08,120 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:08,130 INFO L225 Difference]: With dead ends: 6527 [2021-06-05 23:47:08,130 INFO L226 Difference]: Without dead ends: 6506 [2021-06-05 23:47:08,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1077.7ms TimeCoverageRelationStatistics Valid=451, Invalid=2411, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:47:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2021-06-05 23:47:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 4964. [2021-06-05 23:47:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4964 states, 4963 states have (on average 3.3143260124924443) internal successors, (16449), 4963 states have internal predecessors, (16449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4964 states to 4964 states and 16449 transitions. [2021-06-05 23:47:08,204 INFO L78 Accepts]: Start accepts. Automaton has 4964 states and 16449 transitions. Word has length 30 [2021-06-05 23:47:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:08,204 INFO L482 AbstractCegarLoop]: Abstraction has 4964 states and 16449 transitions. [2021-06-05 23:47:08,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4964 states and 16449 transitions. [2021-06-05 23:47:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:08,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:08,241 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:08,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:08,442 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:08,442 INFO L82 PathProgramCache]: Analyzing trace with hash -5676651, now seen corresponding path program 77 times [2021-06-05 23:47:08,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:08,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715292671] [2021-06-05 23:47:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:08,786 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 23:47:08,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:08,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715292671] [2021-06-05 23:47:08,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715292671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:08,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252753061] [2021-06-05 23:47:08,786 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 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 23:47:08,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:47:08,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:08,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:47:08,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:09,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:09,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 23:47:09,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:09,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:09,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:09,078 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-06-05 23:47:09,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:09,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:09,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:09,085 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-06-05 23:47:09,101 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 23:47:09,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252753061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:09,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:09,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:47:09,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982535709] [2021-06-05 23:47:09,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:09,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:09,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:09,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:09,102 INFO L87 Difference]: Start difference. First operand 4964 states and 16449 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:11,035 INFO L93 Difference]: Finished difference Result 6565 states and 21242 transitions. [2021-06-05 23:47:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:47:11,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:11,045 INFO L225 Difference]: With dead ends: 6565 [2021-06-05 23:47:11,045 INFO L226 Difference]: Without dead ends: 6550 [2021-06-05 23:47:11,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1615.8ms TimeCoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:47:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6550 states. [2021-06-05 23:47:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6550 to 4979. [2021-06-05 23:47:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4979 states, 4978 states have (on average 3.3151868220168743) internal successors, (16503), 4978 states have internal predecessors, (16503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4979 states to 4979 states and 16503 transitions. [2021-06-05 23:47:11,118 INFO L78 Accepts]: Start accepts. Automaton has 4979 states and 16503 transitions. Word has length 30 [2021-06-05 23:47:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:11,118 INFO L482 AbstractCegarLoop]: Abstraction has 4979 states and 16503 transitions. [2021-06-05 23:47:11,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4979 states and 16503 transitions. [2021-06-05 23:47:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:11,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:11,124 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:11,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 23:47:11,324 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1799871485, now seen corresponding path program 78 times [2021-06-05 23:47:11,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:11,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766639505] [2021-06-05 23:47:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:11,733 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 23:47:11,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:11,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766639505] [2021-06-05 23:47:11,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766639505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:11,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704151910] [2021-06-05 23:47:11,733 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 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 23:47:11,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:47:11,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:11,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:47:11,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:11,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:11,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:11,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-06-05 23:47:11,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:12,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:12,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:12,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:47:12,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:12,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:12,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:12,027 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:47:12,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 29 [2021-06-05 23:47:12,028 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:12,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:12,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:12,057 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:128 [2021-06-05 23:47:12,287 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 23:47:12,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704151910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:12,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:12,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:47:12,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628098024] [2021-06-05 23:47:12,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:47:12,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:12,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:47:12,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:47:12,288 INFO L87 Difference]: Start difference. First operand 4979 states and 16503 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:13,112 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 23:47:13,249 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 23:47:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:17,403 INFO L93 Difference]: Finished difference Result 7592 states and 24311 transitions. [2021-06-05 23:47:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:47:17,403 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:17,414 INFO L225 Difference]: With dead ends: 7592 [2021-06-05 23:47:17,414 INFO L226 Difference]: Without dead ends: 7554 [2021-06-05 23:47:17,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 4390.1ms TimeCoverageRelationStatistics Valid=963, Invalid=5357, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 23:47:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7554 states. [2021-06-05 23:47:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7554 to 4989. [2021-06-05 23:47:17,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4989 states, 4988 states have (on average 3.3171611868484363) internal successors, (16546), 4988 states have internal predecessors, (16546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4989 states to 4989 states and 16546 transitions. [2021-06-05 23:47:17,490 INFO L78 Accepts]: Start accepts. Automaton has 4989 states and 16546 transitions. Word has length 30 [2021-06-05 23:47:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:17,491 INFO L482 AbstractCegarLoop]: Abstraction has 4989 states and 16546 transitions. [2021-06-05 23:47:17,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4989 states and 16546 transitions. [2021-06-05 23:47:17,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:17,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:17,496 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:17,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:17,697 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:17,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1630424268, now seen corresponding path program 78 times [2021-06-05 23:47:17,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:17,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652885694] [2021-06-05 23:47:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:17,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:17,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652885694] [2021-06-05 23:47:17,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652885694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:17,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767872459] [2021-06-05 23:47:17,929 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 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 23:47:17,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:47:17,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:47:17,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:18,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:18,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:18,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:47:18,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:18,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:18,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:18,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:18,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:18,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:18,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:47:18,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:18,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:18,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:18,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:47:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:18,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767872459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:18,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:18,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 23:47:18,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992812591] [2021-06-05 23:47:18,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:47:18,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:18,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:47:18,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:47:18,198 INFO L87 Difference]: Start difference. First operand 4989 states and 16546 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:20,824 INFO L93 Difference]: Finished difference Result 8134 states and 26021 transitions. [2021-06-05 23:47:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:47:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:20,835 INFO L225 Difference]: With dead ends: 8134 [2021-06-05 23:47:20,835 INFO L226 Difference]: Without dead ends: 8091 [2021-06-05 23:47:20,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1812.6ms TimeCoverageRelationStatistics Valid=870, Invalid=4242, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:47:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8091 states. [2021-06-05 23:47:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8091 to 5265. [2021-06-05 23:47:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5265 states, 5264 states have (on average 3.3326367781155017) internal successors, (17543), 5264 states have internal predecessors, (17543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5265 states to 5265 states and 17543 transitions. [2021-06-05 23:47:20,920 INFO L78 Accepts]: Start accepts. Automaton has 5265 states and 17543 transitions. Word has length 30 [2021-06-05 23:47:20,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:20,920 INFO L482 AbstractCegarLoop]: Abstraction has 5265 states and 17543 transitions. [2021-06-05 23:47:20,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 5265 states and 17543 transitions. [2021-06-05 23:47:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:20,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:20,926 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:21,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 23:47:21,127 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2104700108, now seen corresponding path program 79 times [2021-06-05 23:47:21,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:21,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312661508] [2021-06-05 23:47:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:21,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:21,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312661508] [2021-06-05 23:47:21,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312661508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:21,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553282824] [2021-06-05 23:47:21,335 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 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 23:47:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:21,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:47:21,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:21,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:21,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:21,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:21,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 23:47:21,557 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:47:21,574 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-05 23:47:21,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:21,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:21,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:47:21,579 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:21,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:21,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:21,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:19 [2021-06-05 23:47:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:21,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553282824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:21,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:21,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:47:21,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822667373] [2021-06-05 23:47:21,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:21,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:21,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:21,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:21,634 INFO L87 Difference]: Start difference. First operand 5265 states and 17543 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:23,743 INFO L93 Difference]: Finished difference Result 8173 states and 26223 transitions. [2021-06-05 23:47:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:47:23,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:23,754 INFO L225 Difference]: With dead ends: 8173 [2021-06-05 23:47:23,754 INFO L226 Difference]: Without dead ends: 8120 [2021-06-05 23:47:23,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1667.1ms TimeCoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:47:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2021-06-05 23:47:23,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 5289. [2021-06-05 23:47:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 5288 states have (on average 3.3369894099848714) internal successors, (17646), 5288 states have internal predecessors, (17646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 17646 transitions. [2021-06-05 23:47:23,834 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 17646 transitions. Word has length 30 [2021-06-05 23:47:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:23,834 INFO L482 AbstractCegarLoop]: Abstraction has 5289 states and 17646 transitions. [2021-06-05 23:47:23,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 17646 transitions. [2021-06-05 23:47:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:23,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:23,840 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:24,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 23:47:24,040 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:24,040 INFO L82 PathProgramCache]: Analyzing trace with hash -675886045, now seen corresponding path program 79 times [2021-06-05 23:47:24,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:24,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044766012] [2021-06-05 23:47:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:24,332 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 23:47:24,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:24,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044766012] [2021-06-05 23:47:24,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044766012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:24,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156654666] [2021-06-05 23:47:24,333 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 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 23:47:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:47:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:24,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:24,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:24,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:47:24,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:24,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:24,583 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:47:24,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:47:24,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:24,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:47:24,587 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:24,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:24,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:24,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:47:24,614 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:59 [2021-06-05 23:47:24,688 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 23:47:24,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156654666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:24,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:24,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:47:24,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718232178] [2021-06-05 23:47:24,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:47:24,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:24,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:47:24,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:47:24,689 INFO L87 Difference]: Start difference. First operand 5289 states and 17646 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 23:47:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:26,680 INFO L93 Difference]: Finished difference Result 7175 states and 23527 transitions. [2021-06-05 23:47:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:47:26,680 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) Word has length 30 [2021-06-05 23:47:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:26,690 INFO L225 Difference]: With dead ends: 7175 [2021-06-05 23:47:26,691 INFO L226 Difference]: Without dead ends: 7156 [2021-06-05 23:47:26,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1659.0ms TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:47:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7156 states. [2021-06-05 23:47:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7156 to 5281. [2021-06-05 23:47:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 5280 states have (on average 3.3357954545454547) internal successors, (17613), 5280 states have internal predecessors, (17613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 17613 transitions. [2021-06-05 23:47:26,768 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 17613 transitions. Word has length 30 [2021-06-05 23:47:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:26,769 INFO L482 AbstractCegarLoop]: Abstraction has 5281 states and 17613 transitions. [2021-06-05 23:47:26,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 23:47:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 17613 transitions. [2021-06-05 23:47:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:26,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:26,775 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:26,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:26,975 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:26,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:26,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1312352899, now seen corresponding path program 80 times [2021-06-05 23:47:26,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:26,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986789293] [2021-06-05 23:47:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:27,263 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 23:47:27,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:27,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986789293] [2021-06-05 23:47:27,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986789293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:27,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796961334] [2021-06-05 23:47:27,264 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 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 23:47:27,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:47:27,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:47:27,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:27,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:27,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:47:27,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:27,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:27,530 INFO L354 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2021-06-05 23:47:27,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 29 [2021-06-05 23:47:27,532 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:27,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:47:27,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:27,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:27,559 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:96 [2021-06-05 23:47:27,688 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 23:47:27,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796961334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:27,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:27,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:47:27,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715287349] [2021-06-05 23:47:27,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:47:27,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:27,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:47:27,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:47:27,689 INFO L87 Difference]: Start difference. First operand 5281 states and 17613 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:31,660 INFO L93 Difference]: Finished difference Result 7602 states and 24556 transitions. [2021-06-05 23:47:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:47:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:31,672 INFO L225 Difference]: With dead ends: 7602 [2021-06-05 23:47:31,672 INFO L226 Difference]: Without dead ends: 7521 [2021-06-05 23:47:31,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 3042.7ms TimeCoverageRelationStatistics Valid=809, Invalid=4891, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 23:47:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7521 states. [2021-06-05 23:47:31,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7521 to 5268. [2021-06-05 23:47:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 3.335105373077653) internal successors, (17566), 5267 states have internal predecessors, (17566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 17566 transitions. [2021-06-05 23:47:31,755 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 17566 transitions. Word has length 30 [2021-06-05 23:47:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:31,755 INFO L482 AbstractCegarLoop]: Abstraction has 5268 states and 17566 transitions. [2021-06-05 23:47:31,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 17566 transitions. [2021-06-05 23:47:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:31,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:31,762 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:31,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:31,962 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:31,962 INFO L82 PathProgramCache]: Analyzing trace with hash -474647012, now seen corresponding path program 80 times [2021-06-05 23:47:31,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:31,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022541592] [2021-06-05 23:47:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:32,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:32,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022541592] [2021-06-05 23:47:32,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022541592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:32,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446411808] [2021-06-05 23:47:32,258 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 23:47:32,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:47:32,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:47:32,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:32,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:32,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:32,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 23:47:32,544 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:47:32,559 INFO L628 ElimStorePlain]: treesize reduction 43, result has 41.9 percent of original size [2021-06-05 23:47:32,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:32,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:32,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:47:32,564 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:32,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:32,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:32,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:15 [2021-06-05 23:47:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:32,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446411808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:32,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:32,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 23:47:32,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106342826] [2021-06-05 23:47:32,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:47:32,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:47:32,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:47:32,613 INFO L87 Difference]: Start difference. First operand 5268 states and 17566 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:36,918 INFO L93 Difference]: Finished difference Result 7880 states and 25277 transitions. [2021-06-05 23:47:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 23:47:36,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:36,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:36,930 INFO L225 Difference]: With dead ends: 7880 [2021-06-05 23:47:36,930 INFO L226 Difference]: Without dead ends: 7837 [2021-06-05 23:47:36,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 3266.6ms TimeCoverageRelationStatistics Valid=1390, Invalid=7540, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 23:47:36,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7837 states. [2021-06-05 23:47:37,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7837 to 5421. [2021-06-05 23:47:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5421 states, 5420 states have (on average 3.3404059040590406) internal successors, (18105), 5420 states have internal predecessors, (18105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:37,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5421 states to 5421 states and 18105 transitions. [2021-06-05 23:47:37,023 INFO L78 Accepts]: Start accepts. Automaton has 5421 states and 18105 transitions. Word has length 30 [2021-06-05 23:47:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:37,023 INFO L482 AbstractCegarLoop]: Abstraction has 5421 states and 18105 transitions. [2021-06-05 23:47:37,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 5421 states and 18105 transitions. [2021-06-05 23:47:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:37,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:37,030 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:37,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-06-05 23:47:37,231 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:37,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1303016299, now seen corresponding path program 81 times [2021-06-05 23:47:37,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:37,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209048719] [2021-06-05 23:47:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:37,517 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 23:47:37,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:37,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209048719] [2021-06-05 23:47:37,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209048719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:37,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734744160] [2021-06-05 23:47:37,517 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 23:47:37,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:47:37,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:37,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:47:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:37,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:37,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:37,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:47:37,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:37,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:37,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:37,842 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:47:37,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:37,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:37,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:37,847 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:47:37,863 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 23:47:37,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734744160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:37,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:37,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 23:47:37,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968532526] [2021-06-05 23:47:37,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:47:37,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:47:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:47:37,863 INFO L87 Difference]: Start difference. First operand 5421 states and 18105 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:40,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:40,407 INFO L93 Difference]: Finished difference Result 6899 states and 22568 transitions. [2021-06-05 23:47:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:47:40,408 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:40,417 INFO L225 Difference]: With dead ends: 6899 [2021-06-05 23:47:40,417 INFO L226 Difference]: Without dead ends: 6884 [2021-06-05 23:47:40,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1885.4ms TimeCoverageRelationStatistics Valid=461, Invalid=2845, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:47:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6884 states. [2021-06-05 23:47:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6884 to 5441. [2021-06-05 23:47:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 3.339154411764706) internal successors, (18165), 5440 states have internal predecessors, (18165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 18165 transitions. [2021-06-05 23:47:40,493 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 18165 transitions. Word has length 30 [2021-06-05 23:47:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:40,493 INFO L482 AbstractCegarLoop]: Abstraction has 5441 states and 18165 transitions. [2021-06-05 23:47:40,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 18165 transitions. [2021-06-05 23:47:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:40,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:40,500 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:40,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:40,705 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:40,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1233121213, now seen corresponding path program 82 times [2021-06-05 23:47:40,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:40,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031088673] [2021-06-05 23:47:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:40,982 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 23:47:40,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:40,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031088673] [2021-06-05 23:47:40,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031088673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:40,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126645929] [2021-06-05 23:47:40,982 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 23:47:41,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:47:41,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:47:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:41,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:47:41,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:41,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,251 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:47:41,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:47:41,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:41,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:47:41,256 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:41,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:47:41,283 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:59 [2021-06-05 23:47:41,358 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 23:47:41,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126645929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:41,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:41,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:47:41,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896548286] [2021-06-05 23:47:41,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:47:41,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:47:41,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:47:41,359 INFO L87 Difference]: Start difference. First operand 5441 states and 18165 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:43,176 INFO L93 Difference]: Finished difference Result 7436 states and 24384 transitions. [2021-06-05 23:47:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:47:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:43,187 INFO L225 Difference]: With dead ends: 7436 [2021-06-05 23:47:43,187 INFO L226 Difference]: Without dead ends: 7417 [2021-06-05 23:47:43,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1667.2ms TimeCoverageRelationStatistics Valid=590, Invalid=2380, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:47:43,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7417 states. [2021-06-05 23:47:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7417 to 5456. [2021-06-05 23:47:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5456 states, 5455 states have (on average 3.3373052245646195) internal successors, (18205), 5455 states have internal predecessors, (18205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5456 states to 5456 states and 18205 transitions. [2021-06-05 23:47:43,272 INFO L78 Accepts]: Start accepts. Automaton has 5456 states and 18205 transitions. Word has length 30 [2021-06-05 23:47:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:43,272 INFO L482 AbstractCegarLoop]: Abstraction has 5456 states and 18205 transitions. [2021-06-05 23:47:43,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 5456 states and 18205 transitions. [2021-06-05 23:47:43,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:43,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:43,278 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:43,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:43,479 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:43,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:43,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1402125315, now seen corresponding path program 83 times [2021-06-05 23:47:43,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:43,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292813171] [2021-06-05 23:47:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:43,754 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 23:47:43,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:43,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292813171] [2021-06-05 23:47:43,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292813171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:43,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409120976] [2021-06-05 23:47:43,754 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 23:47:43,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:47:43,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:47:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:43,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:43,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:43,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:43,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 46 [2021-06-05 23:47:43,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:43,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:43,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:43,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:43,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:43,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:47:43,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:43,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:43,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:43,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:31 [2021-06-05 23:47:44,072 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 23:47:44,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409120976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:44,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:44,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:47:44,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333251509] [2021-06-05 23:47:44,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:44,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:44,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:44,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:44,073 INFO L87 Difference]: Start difference. First operand 5456 states and 18205 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:45,504 INFO L93 Difference]: Finished difference Result 7095 states and 23369 transitions. [2021-06-05 23:47:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:47:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:45,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:45,515 INFO L225 Difference]: With dead ends: 7095 [2021-06-05 23:47:45,515 INFO L226 Difference]: Without dead ends: 7070 [2021-06-05 23:47:45,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1131.0ms TimeCoverageRelationStatistics Valid=366, Invalid=1704, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:47:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7070 states. [2021-06-05 23:47:45,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7070 to 5459. [2021-06-05 23:47:45,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5459 states, 5458 states have (on average 3.337119824111396) internal successors, (18214), 5458 states have internal predecessors, (18214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5459 states to 5459 states and 18214 transitions. [2021-06-05 23:47:45,595 INFO L78 Accepts]: Start accepts. Automaton has 5459 states and 18214 transitions. Word has length 30 [2021-06-05 23:47:45,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:45,595 INFO L482 AbstractCegarLoop]: Abstraction has 5459 states and 18214 transitions. [2021-06-05 23:47:45,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5459 states and 18214 transitions. [2021-06-05 23:47:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:45,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:45,601 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:45,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 23:47:45,802 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1320669075, now seen corresponding path program 84 times [2021-06-05 23:47:45,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:45,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950421532] [2021-06-05 23:47:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:46,074 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 23:47:46,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:46,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950421532] [2021-06-05 23:47:46,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950421532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:46,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318673623] [2021-06-05 23:47:46,074 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 23:47:46,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:47:46,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:46,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:47:46,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:46,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:46,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:46,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:47:46,264 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:46,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:46,273 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:47:46,274 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:46,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:46,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:46,285 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:28 [2021-06-05 23:47:46,347 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 23:47:46,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318673623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:46,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:46,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:47:46,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841958160] [2021-06-05 23:47:46,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:47:46,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:46,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:47:46,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:47:46,348 INFO L87 Difference]: Start difference. First operand 5459 states and 18214 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:47,758 INFO L93 Difference]: Finished difference Result 6873 states and 22663 transitions. [2021-06-05 23:47:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:47:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:47,769 INFO L225 Difference]: With dead ends: 6873 [2021-06-05 23:47:47,769 INFO L226 Difference]: Without dead ends: 6848 [2021-06-05 23:47:47,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1129.0ms TimeCoverageRelationStatistics Valid=392, Invalid=1678, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:47:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2021-06-05 23:47:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 5439. [2021-06-05 23:47:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 5438 states have (on average 3.3387274733357852) internal successors, (18156), 5438 states have internal predecessors, (18156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 18156 transitions. [2021-06-05 23:47:47,872 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 18156 transitions. Word has length 30 [2021-06-05 23:47:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:47,872 INFO L482 AbstractCegarLoop]: Abstraction has 5439 states and 18156 transitions. [2021-06-05 23:47:47,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 18156 transitions. [2021-06-05 23:47:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:47,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:47,879 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:48,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 23:47:48,080 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:48,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:48,080 INFO L82 PathProgramCache]: Analyzing trace with hash 108673360, now seen corresponding path program 81 times [2021-06-05 23:47:48,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:48,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132091800] [2021-06-05 23:47:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:48,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:48,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132091800] [2021-06-05 23:47:48,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132091800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:48,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404346322] [2021-06-05 23:47:48,373 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 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 23:47:48,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:47:48,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:48,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:47:48,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:48,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:48,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:48,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:48,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-06-05 23:47:48,587 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:47:48,605 INFO L628 ElimStorePlain]: treesize reduction 42, result has 46.2 percent of original size [2021-06-05 23:47:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:48,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:48,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:48,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-06-05 23:47:48,610 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:48,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:48,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:48,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:28 [2021-06-05 23:47:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:48,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404346322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:48,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:48,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:47:48,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360665336] [2021-06-05 23:47:48,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:47:48,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:48,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:47:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:47:48,695 INFO L87 Difference]: Start difference. First operand 5439 states and 18156 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 23:47:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:50,186 INFO L93 Difference]: Finished difference Result 7084 states and 23162 transitions. [2021-06-05 23:47:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:47:50,187 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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) Word has length 30 [2021-06-05 23:47:50,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:50,196 INFO L225 Difference]: With dead ends: 7084 [2021-06-05 23:47:50,197 INFO L226 Difference]: Without dead ends: 7004 [2021-06-05 23:47:50,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1384.9ms TimeCoverageRelationStatistics Valid=492, Invalid=2588, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:47:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7004 states. [2021-06-05 23:47:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7004 to 5430. [2021-06-05 23:47:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5430 states, 5429 states have (on average 3.340762571375944) internal successors, (18137), 5429 states have internal predecessors, (18137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:50,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5430 states to 5430 states and 18137 transitions. [2021-06-05 23:47:50,279 INFO L78 Accepts]: Start accepts. Automaton has 5430 states and 18137 transitions. Word has length 30 [2021-06-05 23:47:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:50,279 INFO L482 AbstractCegarLoop]: Abstraction has 5430 states and 18137 transitions. [2021-06-05 23:47:50,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 23:47:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5430 states and 18137 transitions. [2021-06-05 23:47:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:50,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:50,286 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:50,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:50,486 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:50,487 INFO L82 PathProgramCache]: Analyzing trace with hash 287214728, now seen corresponding path program 82 times [2021-06-05 23:47:50,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:50,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282708182] [2021-06-05 23:47:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:50,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:50,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282708182] [2021-06-05 23:47:50,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282708182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:50,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154403681] [2021-06-05 23:47:50,764 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 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 23:47:50,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:47:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:47:50,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:51,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:51,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:51,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:51,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:51,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:47:51,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:51,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:51,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:51,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:51,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:47:51,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:51,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:51,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:51,023 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:47:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:51,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154403681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:51,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:51,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 23:47:51,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613956337] [2021-06-05 23:47:51,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:47:51,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:47:51,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:47:51,040 INFO L87 Difference]: Start difference. First operand 5430 states and 18137 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:53,575 INFO L93 Difference]: Finished difference Result 6976 states and 22710 transitions. [2021-06-05 23:47:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:47:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:53,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:53,585 INFO L225 Difference]: With dead ends: 6976 [2021-06-05 23:47:53,585 INFO L226 Difference]: Without dead ends: 6948 [2021-06-05 23:47:53,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 2053.5ms TimeCoverageRelationStatistics Valid=769, Invalid=3923, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:47:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6948 states. [2021-06-05 23:47:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6948 to 5418. [2021-06-05 23:47:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 5417 states have (on average 3.341332841055935) internal successors, (18100), 5417 states have internal predecessors, (18100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 18100 transitions. [2021-06-05 23:47:53,657 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 18100 transitions. Word has length 30 [2021-06-05 23:47:53,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:53,657 INFO L482 AbstractCegarLoop]: Abstraction has 5418 states and 18100 transitions. [2021-06-05 23:47:53,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:53,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 18100 transitions. [2021-06-05 23:47:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:53,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:53,664 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:53,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 23:47:53,865 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash -687128376, now seen corresponding path program 83 times [2021-06-05 23:47:53,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:53,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910169454] [2021-06-05 23:47:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:54,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:54,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910169454] [2021-06-05 23:47:54,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910169454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:54,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387364922] [2021-06-05 23:47:54,130 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 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 23:47:54,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:47:54,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:54,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:47:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,387 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 23:47:54,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 143 [2021-06-05 23:47:54,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:54,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:54,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:54,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:47:54,398 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:54,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:54,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:54,402 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:180, output treesize:3 [2021-06-05 23:47:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:54,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387364922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:54,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:54,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 23:47:54,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240955694] [2021-06-05 23:47:54,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:54,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:54,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:54,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:54,425 INFO L87 Difference]: Start difference. First operand 5418 states and 18100 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:56,601 INFO L93 Difference]: Finished difference Result 7242 states and 23700 transitions. [2021-06-05 23:47:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:47:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:56,610 INFO L225 Difference]: With dead ends: 7242 [2021-06-05 23:47:56,611 INFO L226 Difference]: Without dead ends: 7187 [2021-06-05 23:47:56,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1655.1ms TimeCoverageRelationStatistics Valid=668, Invalid=2992, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:47:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2021-06-05 23:47:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 5558. [2021-06-05 23:47:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 5557 states have (on average 3.3419111031131905) internal successors, (18571), 5557 states have internal predecessors, (18571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 18571 transitions. [2021-06-05 23:47:56,686 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 18571 transitions. Word has length 30 [2021-06-05 23:47:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:56,686 INFO L482 AbstractCegarLoop]: Abstraction has 5558 states and 18571 transitions. [2021-06-05 23:47:56,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 18571 transitions. [2021-06-05 23:47:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:56,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:56,692 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:56,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 23:47:56,893 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1271744709, now seen corresponding path program 85 times [2021-06-05 23:47:56,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:56,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267871660] [2021-06-05 23:47:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:57,073 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 23:47:57,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:57,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267871660] [2021-06-05 23:47:57,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267871660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:57,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022797506] [2021-06-05 23:47:57,074 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 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 23:47:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:57,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:47:57,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:57,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:57,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:57,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:47:57,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:57,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:57,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:57,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:47:57,309 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:57,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:57,326 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:47:57,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:47:57,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:57,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:57,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:57,346 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:57 [2021-06-05 23:47:57,461 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 23:47:57,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022797506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:57,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:57,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:47:57,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537792791] [2021-06-05 23:47:57,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:57,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:57,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:57,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:57,462 INFO L87 Difference]: Start difference. First operand 5558 states and 18571 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:58,801 INFO L93 Difference]: Finished difference Result 7327 states and 24193 transitions. [2021-06-05 23:47:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:47:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:58,813 INFO L225 Difference]: With dead ends: 7327 [2021-06-05 23:47:58,813 INFO L226 Difference]: Without dead ends: 7302 [2021-06-05 23:47:58,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1205.2ms TimeCoverageRelationStatistics Valid=377, Invalid=1603, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:47:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7302 states. [2021-06-05 23:47:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7302 to 5558. [2021-06-05 23:47:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 5557 states have (on average 3.3419111031131905) internal successors, (18571), 5557 states have internal predecessors, (18571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 18571 transitions. [2021-06-05 23:47:58,897 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 18571 transitions. Word has length 30 [2021-06-05 23:47:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:58,897 INFO L482 AbstractCegarLoop]: Abstraction has 5558 states and 18571 transitions. [2021-06-05 23:47:58,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 18571 transitions. [2021-06-05 23:47:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:58,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:58,904 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:59,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 23:47:59,105 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:59,105 INFO L82 PathProgramCache]: Analyzing trace with hash -300428197, now seen corresponding path program 86 times [2021-06-05 23:47:59,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:59,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331604590] [2021-06-05 23:47:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:59,385 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 23:47:59,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:59,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331604590] [2021-06-05 23:47:59,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331604590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:59,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347796936] [2021-06-05 23:47:59,386 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 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 23:47:59,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:47:59,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:59,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:47:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:59,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:59,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:47:59,622 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:59,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:59,630 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:47:59,631 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:59,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:59,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:59,638 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:47:59,700 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 23:47:59,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347796936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:59,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:59,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:47:59,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610735867] [2021-06-05 23:47:59,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:59,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:59,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:59,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:59,701 INFO L87 Difference]: Start difference. First operand 5558 states and 18571 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:00,983 INFO L93 Difference]: Finished difference Result 7202 states and 23821 transitions. [2021-06-05 23:48:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:48:00,983 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:00,994 INFO L225 Difference]: With dead ends: 7202 [2021-06-05 23:48:00,994 INFO L226 Difference]: Without dead ends: 7177 [2021-06-05 23:48:00,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1172.6ms TimeCoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:48:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2021-06-05 23:48:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 5527. [2021-06-05 23:48:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5527 states, 5526 states have (on average 3.3431053203040175) internal successors, (18474), 5526 states have internal predecessors, (18474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 18474 transitions. [2021-06-05 23:48:01,077 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 18474 transitions. Word has length 30 [2021-06-05 23:48:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:01,077 INFO L482 AbstractCegarLoop]: Abstraction has 5527 states and 18474 transitions. [2021-06-05 23:48:01,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 18474 transitions. [2021-06-05 23:48:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:01,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:01,084 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:01,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 23:48:01,285 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1566410243, now seen corresponding path program 87 times [2021-06-05 23:48:01,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:01,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119117603] [2021-06-05 23:48:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:01,479 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 23:48:01,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:01,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119117603] [2021-06-05 23:48:01,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119117603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:01,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944067811] [2021-06-05 23:48:01,480 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 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 23:48:01,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:48:01,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:01,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:01,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:01,782 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-06-05 23:48:01,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:48:01,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:01,845 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-06-05 23:48:01,845 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 60 [2021-06-05 23:48:01,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:01,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:01,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 23:48:01,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:01,928 INFO L628 ElimStorePlain]: treesize reduction 52, result has 51.4 percent of original size [2021-06-05 23:48:01,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:01,965 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:98 [2021-06-05 23:48:02,201 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 23:48:02,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944067811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:02,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:02,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 23:48:02,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401479977] [2021-06-05 23:48:02,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:48:02,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:02,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:48:02,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:48:02,202 INFO L87 Difference]: Start difference. First operand 5527 states and 18474 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:04,647 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 23:48:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:06,089 INFO L93 Difference]: Finished difference Result 6852 states and 22371 transitions. [2021-06-05 23:48:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:48:06,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:06,100 INFO L225 Difference]: With dead ends: 6852 [2021-06-05 23:48:06,101 INFO L226 Difference]: Without dead ends: 6808 [2021-06-05 23:48:06,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 3136.3ms TimeCoverageRelationStatistics Valid=595, Invalid=4661, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:48:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6808 states. [2021-06-05 23:48:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6808 to 5544. [2021-06-05 23:48:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5544 states, 5543 states have (on average 3.3411510012628542) internal successors, (18520), 5543 states have internal predecessors, (18520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5544 states to 5544 states and 18520 transitions. [2021-06-05 23:48:06,183 INFO L78 Accepts]: Start accepts. Automaton has 5544 states and 18520 transitions. Word has length 30 [2021-06-05 23:48:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:06,183 INFO L482 AbstractCegarLoop]: Abstraction has 5544 states and 18520 transitions. [2021-06-05 23:48:06,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5544 states and 18520 transitions. [2021-06-05 23:48:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:06,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:06,189 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:06,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 23:48:06,389 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:06,390 INFO L82 PathProgramCache]: Analyzing trace with hash 997008189, now seen corresponding path program 88 times [2021-06-05 23:48:06,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:06,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776545034] [2021-06-05 23:48:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:06,595 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 23:48:06,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:06,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776545034] [2021-06-05 23:48:06,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776545034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:06,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029923095] [2021-06-05 23:48:06,596 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 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 23:48:06,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:48:06,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:06,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:48:06,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:06,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:06,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:06,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:48:06,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:48:06,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:06,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:06,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:48:06,849 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:48:06,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:06,867 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:48:06,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:48:06,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:06,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:06,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:06,887 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:57 [2021-06-05 23:48:07,001 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 23:48:07,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029923095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:07,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:07,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:48:07,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649211776] [2021-06-05 23:48:07,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:48:07,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:48:07,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:48:07,002 INFO L87 Difference]: Start difference. First operand 5544 states and 18520 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 23:48:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:08,053 INFO L93 Difference]: Finished difference Result 7273 states and 24041 transitions. [2021-06-05 23:48:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:48:08,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) Word has length 30 [2021-06-05 23:48:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:08,064 INFO L225 Difference]: With dead ends: 7273 [2021-06-05 23:48:08,064 INFO L226 Difference]: Without dead ends: 7248 [2021-06-05 23:48:08,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 998.7ms TimeCoverageRelationStatistics Valid=310, Invalid=1330, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:48:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7248 states. [2021-06-05 23:48:08,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7248 to 5521. [2021-06-05 23:48:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5521 states, 5520 states have (on average 3.342753623188406) internal successors, (18452), 5520 states have internal predecessors, (18452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5521 states to 5521 states and 18452 transitions. [2021-06-05 23:48:08,181 INFO L78 Accepts]: Start accepts. Automaton has 5521 states and 18452 transitions. Word has length 30 [2021-06-05 23:48:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:08,182 INFO L482 AbstractCegarLoop]: Abstraction has 5521 states and 18452 transitions. [2021-06-05 23:48:08,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 23:48:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5521 states and 18452 transitions. [2021-06-05 23:48:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:08,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:08,189 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:08,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:08,390 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:08,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:08,390 INFO L82 PathProgramCache]: Analyzing trace with hash 388626896, now seen corresponding path program 84 times [2021-06-05 23:48:08,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:08,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687733079] [2021-06-05 23:48:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:08,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:08,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687733079] [2021-06-05 23:48:08,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687733079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:08,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281550922] [2021-06-05 23:48:08,697 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 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 23:48:08,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:48:08,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:08,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:48:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:08,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:08,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:08,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:08,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:48:08,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:08,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:08,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:08,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:08,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:08,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:08,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:48:08,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:08,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:08,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:08,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:48:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:08,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281550922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:08,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:08,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 23:48:08,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584200553] [2021-06-05 23:48:08,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:48:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:08,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:48:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:48:08,969 INFO L87 Difference]: Start difference. First operand 5521 states and 18452 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:11,796 INFO L93 Difference]: Finished difference Result 8137 states and 26630 transitions. [2021-06-05 23:48:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:48:11,796 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:11,808 INFO L225 Difference]: With dead ends: 8137 [2021-06-05 23:48:11,808 INFO L226 Difference]: Without dead ends: 8115 [2021-06-05 23:48:11,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 2449.9ms TimeCoverageRelationStatistics Valid=951, Invalid=4305, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:48:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8115 states. [2021-06-05 23:48:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8115 to 5517. [2021-06-05 23:48:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 3.343364757070341) internal successors, (18442), 5516 states have internal predecessors, (18442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 18442 transitions. [2021-06-05 23:48:11,890 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 18442 transitions. Word has length 30 [2021-06-05 23:48:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:11,890 INFO L482 AbstractCegarLoop]: Abstraction has 5517 states and 18442 transitions. [2021-06-05 23:48:11,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 18442 transitions. [2021-06-05 23:48:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:11,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:11,896 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:12,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 23:48:12,097 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:12,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2061171920, now seen corresponding path program 85 times [2021-06-05 23:48:12,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:12,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730030748] [2021-06-05 23:48:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:12,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:12,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730030748] [2021-06-05 23:48:12,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730030748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:12,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586096053] [2021-06-05 23:48:12,455 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 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 23:48:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:12,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:12,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:12,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:12,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:12,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:48:12,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:12,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:12,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:12,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:48:12,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:12,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:12,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:12,718 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:48:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:12,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586096053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:12,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:12,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:48:12,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080999626] [2021-06-05 23:48:12,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:48:12,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:12,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:48:12,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:48:12,740 INFO L87 Difference]: Start difference. First operand 5517 states and 18442 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:48:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:15,040 INFO L93 Difference]: Finished difference Result 7422 states and 24412 transitions. [2021-06-05 23:48:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:48:15,040 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) Word has length 30 [2021-06-05 23:48:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:15,051 INFO L225 Difference]: With dead ends: 7422 [2021-06-05 23:48:15,051 INFO L226 Difference]: Without dead ends: 7380 [2021-06-05 23:48:15,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1969.3ms TimeCoverageRelationStatistics Valid=774, Invalid=3648, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:48:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7380 states. [2021-06-05 23:48:15,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7380 to 5527. [2021-06-05 23:48:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5527 states, 5526 states have (on average 3.3425624321389793) internal successors, (18471), 5526 states have internal predecessors, (18471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 18471 transitions. [2021-06-05 23:48:15,131 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 18471 transitions. Word has length 30 [2021-06-05 23:48:15,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:15,132 INFO L482 AbstractCegarLoop]: Abstraction has 5527 states and 18471 transitions. [2021-06-05 23:48:15,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:48:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 18471 transitions. [2021-06-05 23:48:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:15,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:15,139 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:15,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:15,339 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash 49459472, now seen corresponding path program 86 times [2021-06-05 23:48:15,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:15,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874454226] [2021-06-05 23:48:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:15,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:15,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874454226] [2021-06-05 23:48:15,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874454226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:15,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912391658] [2021-06-05 23:48:15,553 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 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 23:48:15,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:48:15,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:15,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:48:15,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:15,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:15,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:15,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:15,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 23:48:15,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:48:15,796 INFO L628 ElimStorePlain]: treesize reduction 72, result has 32.1 percent of original size [2021-06-05 23:48:15,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:15,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:15,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:15,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:48:15,801 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:48:15,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:15,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:15,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:28 [2021-06-05 23:48:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:15,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912391658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:15,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:15,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:48:15,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465567426] [2021-06-05 23:48:15,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:48:15,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:15,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:48:15,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:48:15,883 INFO L87 Difference]: Start difference. First operand 5527 states and 18471 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:17,165 INFO L93 Difference]: Finished difference Result 7739 states and 25386 transitions. [2021-06-05 23:48:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:48:17,165 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:17,176 INFO L225 Difference]: With dead ends: 7739 [2021-06-05 23:48:17,176 INFO L226 Difference]: Without dead ends: 7673 [2021-06-05 23:48:17,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1073.6ms TimeCoverageRelationStatistics Valid=452, Invalid=2200, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:48:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2021-06-05 23:48:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 5618. [2021-06-05 23:48:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 5617 states have (on average 3.3464482820010684) internal successors, (18797), 5617 states have internal predecessors, (18797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 18797 transitions. [2021-06-05 23:48:17,261 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 18797 transitions. Word has length 30 [2021-06-05 23:48:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:17,261 INFO L482 AbstractCegarLoop]: Abstraction has 5618 states and 18797 transitions. [2021-06-05 23:48:17,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:17,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 18797 transitions. [2021-06-05 23:48:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:17,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:17,268 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:17,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:17,468 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:17,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1399561510, now seen corresponding path program 87 times [2021-06-05 23:48:17,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:17,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522066856] [2021-06-05 23:48:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:17,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:17,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522066856] [2021-06-05 23:48:17,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522066856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:17,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559704140] [2021-06-05 23:48:17,886 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 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 23:48:17,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:48:17,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:17,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:48:17,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:18,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:18,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:18,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:18,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:48:18,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:18,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:18,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:18,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:18,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:18,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:48:18,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:18,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:18,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:18,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 23:48:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:18,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559704140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:18,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:18,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 23:48:18,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852050587] [2021-06-05 23:48:18,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:48:18,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:48:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:48:18,253 INFO L87 Difference]: Start difference. First operand 5618 states and 18797 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:24,672 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 23:48:25,469 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 23:48:25,933 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 23:48:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:26,189 INFO L93 Difference]: Finished difference Result 7924 states and 25416 transitions. [2021-06-05 23:48:26,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 23:48:26,190 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:26,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:26,201 INFO L225 Difference]: With dead ends: 7924 [2021-06-05 23:48:26,201 INFO L226 Difference]: Without dead ends: 7824 [2021-06-05 23:48:26,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3780 ImplicationChecksByTransitivity, 6368.3ms TimeCoverageRelationStatistics Valid=1440, Invalid=10332, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:48:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7824 states. [2021-06-05 23:48:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7824 to 5717. [2021-06-05 23:48:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5717 states, 5716 states have (on average 3.343771868439468) internal successors, (19113), 5716 states have internal predecessors, (19113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:26,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5717 states to 5717 states and 19113 transitions. [2021-06-05 23:48:26,314 INFO L78 Accepts]: Start accepts. Automaton has 5717 states and 19113 transitions. Word has length 30 [2021-06-05 23:48:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:26,314 INFO L482 AbstractCegarLoop]: Abstraction has 5717 states and 19113 transitions. [2021-06-05 23:48:26,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5717 states and 19113 transitions. [2021-06-05 23:48:26,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:26,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:26,321 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:26,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 23:48:26,522 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:26,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1194412548, now seen corresponding path program 88 times [2021-06-05 23:48:26,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:26,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737658692] [2021-06-05 23:48:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:26,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:26,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737658692] [2021-06-05 23:48:26,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737658692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:26,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741179814] [2021-06-05 23:48:26,845 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 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 23:48:26,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:48:26,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:26,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:26,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:27,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:27,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:27,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:27,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:27,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:48:27,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:27,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:27,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:27,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:27,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:27,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:48:27,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:27,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:27,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:27,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:48:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:27,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741179814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:27,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:27,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:48:27,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212942464] [2021-06-05 23:48:27,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:27,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:27,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:27,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:27,133 INFO L87 Difference]: Start difference. First operand 5717 states and 19113 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:29,715 INFO L93 Difference]: Finished difference Result 8588 states and 27823 transitions. [2021-06-05 23:48:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:48:29,715 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:29,728 INFO L225 Difference]: With dead ends: 8588 [2021-06-05 23:48:29,728 INFO L226 Difference]: Without dead ends: 8573 [2021-06-05 23:48:29,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2039.6ms TimeCoverageRelationStatistics Valid=763, Invalid=4349, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:48:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8573 states. [2021-06-05 23:48:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8573 to 5777. [2021-06-05 23:48:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 5776 states have (on average 3.342797783933518) internal successors, (19308), 5776 states have internal predecessors, (19308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 19308 transitions. [2021-06-05 23:48:29,824 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 19308 transitions. Word has length 30 [2021-06-05 23:48:29,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:29,824 INFO L482 AbstractCegarLoop]: Abstraction has 5777 states and 19308 transitions. [2021-06-05 23:48:29,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:29,824 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 19308 transitions. [2021-06-05 23:48:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:29,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:29,831 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:30,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 23:48:30,032 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash 578695288, now seen corresponding path program 89 times [2021-06-05 23:48:30,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:30,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593457101] [2021-06-05 23:48:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:30,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:30,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593457101] [2021-06-05 23:48:30,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593457101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:30,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258350705] [2021-06-05 23:48:30,360 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 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 23:48:30,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:48:30,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:30,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:30,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:30,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:30,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:30,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:30,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 23:48:30,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:48:30,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:30,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:30,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:30,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:48:30,611 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:48:30,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:30,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:30,620 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:19 [2021-06-05 23:48:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:30,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258350705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:30,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:30,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:48:30,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516919233] [2021-06-05 23:48:30,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:30,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:30,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:30,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:30,668 INFO L87 Difference]: Start difference. First operand 5777 states and 19308 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:34,817 INFO L93 Difference]: Finished difference Result 9534 states and 30606 transitions. [2021-06-05 23:48:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:48:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:34,832 INFO L225 Difference]: With dead ends: 9534 [2021-06-05 23:48:34,832 INFO L226 Difference]: Without dead ends: 9486 [2021-06-05 23:48:34,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3212 ImplicationChecksByTransitivity, 3432.7ms TimeCoverageRelationStatistics Valid=1490, Invalid=8016, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 23:48:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9486 states. [2021-06-05 23:48:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9486 to 5783. [2021-06-05 23:48:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 3.343998616395711) internal successors, (19335), 5782 states have internal predecessors, (19335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 19335 transitions. [2021-06-05 23:48:34,977 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 19335 transitions. Word has length 30 [2021-06-05 23:48:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:34,977 INFO L482 AbstractCegarLoop]: Abstraction has 5783 states and 19335 transitions. [2021-06-05 23:48:34,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 19335 transitions. [2021-06-05 23:48:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:34,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:34,984 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:35,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 23:48:35,184 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:35,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1854678904, now seen corresponding path program 90 times [2021-06-05 23:48:35,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:35,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103566441] [2021-06-05 23:48:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:35,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:35,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103566441] [2021-06-05 23:48:35,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103566441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:35,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048235819] [2021-06-05 23:48:35,590 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 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 23:48:35,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:48:35,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:35,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:48:35,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:35,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:35,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 23:48:35,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:48:35,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:35,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:35,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:35,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:48:35,886 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:48:35,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:35,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:35,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:15 [2021-06-05 23:48:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:35,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048235819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:35,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:35,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 23:48:35,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579237214] [2021-06-05 23:48:35,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:48:35,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:35,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:48:35,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:48:35,944 INFO L87 Difference]: Start difference. First operand 5783 states and 19335 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:39,805 INFO L93 Difference]: Finished difference Result 8894 states and 28574 transitions. [2021-06-05 23:48:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:48:39,805 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:39,818 INFO L225 Difference]: With dead ends: 8894 [2021-06-05 23:48:39,818 INFO L226 Difference]: Without dead ends: 8853 [2021-06-05 23:48:39,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 3264.9ms TimeCoverageRelationStatistics Valid=1525, Invalid=6131, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 23:48:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-06-05 23:48:39,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 5861. [2021-06-05 23:48:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5861 states, 5860 states have (on average 3.3389078498293516) internal successors, (19566), 5860 states have internal predecessors, (19566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:39,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5861 states to 5861 states and 19566 transitions. [2021-06-05 23:48:39,920 INFO L78 Accepts]: Start accepts. Automaton has 5861 states and 19566 transitions. Word has length 30 [2021-06-05 23:48:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:39,920 INFO L482 AbstractCegarLoop]: Abstraction has 5861 states and 19566 transitions. [2021-06-05 23:48:39,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 5861 states and 19566 transitions. [2021-06-05 23:48:39,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:39,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:39,927 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:40,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:40,128 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1126539580, now seen corresponding path program 91 times [2021-06-05 23:48:40,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:40,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106575936] [2021-06-05 23:48:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:40,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106575936] [2021-06-05 23:48:40,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106575936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893825475] [2021-06-05 23:48:40,540 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 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 23:48:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:40,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:40,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:40,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:40,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:40,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:40,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:48:40,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:40,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:40,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:40,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:40,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:40,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:40,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:48:40,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:40,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:40,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:40,758 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:48:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:40,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893825475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:40,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:40,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 23:48:40,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344532442] [2021-06-05 23:48:40,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:48:40,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:48:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:48:40,813 INFO L87 Difference]: Start difference. First operand 5861 states and 19566 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 23:48:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:43,611 INFO L93 Difference]: Finished difference Result 7171 states and 23470 transitions. [2021-06-05 23:48:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:48:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) Word has length 30 [2021-06-05 23:48:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:43,622 INFO L225 Difference]: With dead ends: 7171 [2021-06-05 23:48:43,622 INFO L226 Difference]: Without dead ends: 7149 [2021-06-05 23:48:43,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2400.8ms TimeCoverageRelationStatistics Valid=664, Invalid=3626, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:48:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7149 states. [2021-06-05 23:48:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7149 to 5857. [2021-06-05 23:48:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5857 states, 5856 states have (on average 3.3394808743169397) internal successors, (19556), 5856 states have internal predecessors, (19556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5857 states to 5857 states and 19556 transitions. [2021-06-05 23:48:43,726 INFO L78 Accepts]: Start accepts. Automaton has 5857 states and 19556 transitions. Word has length 30 [2021-06-05 23:48:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:43,726 INFO L482 AbstractCegarLoop]: Abstraction has 5857 states and 19556 transitions. [2021-06-05 23:48:43,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 23:48:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5857 states and 19556 transitions. [2021-06-05 23:48:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:43,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:43,733 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:43,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 23:48:43,934 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2081834100, now seen corresponding path program 92 times [2021-06-05 23:48:43,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:43,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895542640] [2021-06-05 23:48:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:44,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:44,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895542640] [2021-06-05 23:48:44,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895542640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:44,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681996830] [2021-06-05 23:48:44,306 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 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 23:48:44,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:48:44,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:44,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:48:44,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:44,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:44,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:44,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:44,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:44,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:48:44,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:44,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:44,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:44,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:44,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:44,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:44,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 3 [2021-06-05 23:48:44,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:44,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:44,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:44,592 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-06-05 23:48:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:44,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681996830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:44,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:44,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 23:48:44,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777369645] [2021-06-05 23:48:44,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:48:44,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:48:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:48:44,634 INFO L87 Difference]: Start difference. First operand 5857 states and 19556 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:48,618 INFO L93 Difference]: Finished difference Result 7574 states and 24794 transitions. [2021-06-05 23:48:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:48:48,618 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:48,629 INFO L225 Difference]: With dead ends: 7574 [2021-06-05 23:48:48,629 INFO L226 Difference]: Without dead ends: 7537 [2021-06-05 23:48:48,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 3176.4ms TimeCoverageRelationStatistics Valid=1125, Invalid=6531, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 23:48:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7537 states. [2021-06-05 23:48:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7537 to 5857. [2021-06-05 23:48:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5857 states, 5856 states have (on average 3.3394808743169397) internal successors, (19556), 5856 states have internal predecessors, (19556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5857 states to 5857 states and 19556 transitions. [2021-06-05 23:48:48,714 INFO L78 Accepts]: Start accepts. Automaton has 5857 states and 19556 transitions. Word has length 30 [2021-06-05 23:48:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:48,714 INFO L482 AbstractCegarLoop]: Abstraction has 5857 states and 19556 transitions. [2021-06-05 23:48:48,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 5857 states and 19556 transitions. [2021-06-05 23:48:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:48,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:48,721 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:48,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 23:48:48,921 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:48,921 INFO L82 PathProgramCache]: Analyzing trace with hash -414129868, now seen corresponding path program 93 times [2021-06-05 23:48:48,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:48,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461024103] [2021-06-05 23:48:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:49,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:49,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461024103] [2021-06-05 23:48:49,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461024103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:49,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55858627] [2021-06-05 23:48:49,286 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 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 23:48:49,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:48:49,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:49,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:49,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:49,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:49,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-06-05 23:48:49,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:48:49,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:49,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:49,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:49,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:49,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-06-05 23:48:49,554 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:48:49,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:49,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:49,563 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:28 [2021-06-05 23:48:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:49,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55858627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:49,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:49,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:48:49,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558201816] [2021-06-05 23:48:49,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:49,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:49,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:49,641 INFO L87 Difference]: Start difference. First operand 5857 states and 19556 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:52,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:52,664 INFO L93 Difference]: Finished difference Result 9426 states and 30584 transitions. [2021-06-05 23:48:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:48:52,665 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:52,677 INFO L225 Difference]: With dead ends: 9426 [2021-06-05 23:48:52,677 INFO L226 Difference]: Without dead ends: 9370 [2021-06-05 23:48:52,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 2473.6ms TimeCoverageRelationStatistics Valid=969, Invalid=5193, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:48:52,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2021-06-05 23:48:52,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 5868. [2021-06-05 23:48:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 3.337651269814215) internal successors, (19582), 5867 states have internal predecessors, (19582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 19582 transitions. [2021-06-05 23:48:52,771 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 19582 transitions. Word has length 30 [2021-06-05 23:48:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:52,771 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 19582 transitions. [2021-06-05 23:48:52,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:52,771 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 19582 transitions. [2021-06-05 23:48:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:52,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:52,778 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:52,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:52,979 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:52,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2053707068, now seen corresponding path program 94 times [2021-06-05 23:48:52,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:52,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538085769] [2021-06-05 23:48:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:53,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538085769] [2021-06-05 23:48:53,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538085769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183205356] [2021-06-05 23:48:53,397 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 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 23:48:53,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:48:53,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:53,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:48:53,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:53,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:53,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:53,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:48:53,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:53,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:53,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:53,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:53,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:53,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:53,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:48:53,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:53,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:53,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:53,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:48:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:53,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183205356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:53,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:53,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:48:53,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091151559] [2021-06-05 23:48:53,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:48:53,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:53,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:48:53,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:48:53,657 INFO L87 Difference]: Start difference. First operand 5868 states and 19582 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:57,177 INFO L93 Difference]: Finished difference Result 7377 states and 24116 transitions. [2021-06-05 23:48:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 23:48:57,177 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:57,187 INFO L225 Difference]: With dead ends: 7377 [2021-06-05 23:48:57,188 INFO L226 Difference]: Without dead ends: 7355 [2021-06-05 23:48:57,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 2885.0ms TimeCoverageRelationStatistics Valid=783, Invalid=4917, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 23:48:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7355 states. [2021-06-05 23:48:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7355 to 5865. [2021-06-05 23:48:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5865 states, 5864 states have (on average 3.338506139154161) internal successors, (19577), 5864 states have internal predecessors, (19577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5865 states to 5865 states and 19577 transitions. [2021-06-05 23:48:57,268 INFO L78 Accepts]: Start accepts. Automaton has 5865 states and 19577 transitions. Word has length 30 [2021-06-05 23:48:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:57,268 INFO L482 AbstractCegarLoop]: Abstraction has 5865 states and 19577 transitions. [2021-06-05 23:48:57,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5865 states and 19577 transitions. [2021-06-05 23:48:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:57,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:57,275 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:57,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 23:48:57,476 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:57,476 INFO L82 PathProgramCache]: Analyzing trace with hash 754875072, now seen corresponding path program 95 times [2021-06-05 23:48:57,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:57,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203161614] [2021-06-05 23:48:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:57,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:57,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203161614] [2021-06-05 23:48:57,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203161614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:57,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053480656] [2021-06-05 23:48:57,825 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 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 23:48:57,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:48:57,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:57,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:48:57,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:58,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:58,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:58,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:58,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:58,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:48:58,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:58,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:58,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:58,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:58,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:58,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:58,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:48:58,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:58,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:58,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:58,106 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:48:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:58,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053480656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:58,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:58,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:48:58,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430284554] [2021-06-05 23:48:58,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:58,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:58,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:58,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:58,129 INFO L87 Difference]: Start difference. First operand 5865 states and 19577 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:00,292 INFO L93 Difference]: Finished difference Result 8470 states and 27518 transitions. [2021-06-05 23:49:00,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:49:00,293 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:00,305 INFO L225 Difference]: With dead ends: 8470 [2021-06-05 23:49:00,306 INFO L226 Difference]: Without dead ends: 8455 [2021-06-05 23:49:00,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1815.3ms TimeCoverageRelationStatistics Valid=617, Invalid=3415, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:49:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2021-06-05 23:49:00,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 5907. [2021-06-05 23:49:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5907 states, 5906 states have (on average 3.335082966474771) internal successors, (19697), 5906 states have internal predecessors, (19697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5907 states to 5907 states and 19697 transitions. [2021-06-05 23:49:00,405 INFO L78 Accepts]: Start accepts. Automaton has 5907 states and 19697 transitions. Word has length 30 [2021-06-05 23:49:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:00,405 INFO L482 AbstractCegarLoop]: Abstraction has 5907 states and 19697 transitions. [2021-06-05 23:49:00,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5907 states and 19697 transitions. [2021-06-05 23:49:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:00,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:00,412 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:00,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 23:49:00,613 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:00,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1766984388, now seen corresponding path program 96 times [2021-06-05 23:49:00,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:00,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225036720] [2021-06-05 23:49:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:01,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:01,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225036720] [2021-06-05 23:49:01,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225036720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:01,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273827498] [2021-06-05 23:49:01,069 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 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 23:49:01,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:49:01,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:01,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:49:01,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:01,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:01,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:01,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:01,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:01,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-06-05 23:49:01,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:49:01,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:01,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:01,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:01,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-06-05 23:49:01,393 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:01,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:01,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:01,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:15 [2021-06-05 23:49:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:01,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273827498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:01,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:01,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 23:49:01,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755481179] [2021-06-05 23:49:01,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:49:01,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:49:01,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:49:01,449 INFO L87 Difference]: Start difference. First operand 5907 states and 19697 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:07,946 INFO L93 Difference]: Finished difference Result 11402 states and 36562 transitions. [2021-06-05 23:49:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 23:49:07,947 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:07,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:07,963 INFO L225 Difference]: With dead ends: 11402 [2021-06-05 23:49:07,963 INFO L226 Difference]: Without dead ends: 11338 [2021-06-05 23:49:07,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6143 ImplicationChecksByTransitivity, 5563.6ms TimeCoverageRelationStatistics Valid=2652, Invalid=14118, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 23:49:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11338 states. [2021-06-05 23:49:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11338 to 5941. [2021-06-05 23:49:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5941 states, 5940 states have (on average 3.333164983164983) internal successors, (19799), 5940 states have internal predecessors, (19799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5941 states to 5941 states and 19799 transitions. [2021-06-05 23:49:08,083 INFO L78 Accepts]: Start accepts. Automaton has 5941 states and 19799 transitions. Word has length 30 [2021-06-05 23:49:08,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:08,083 INFO L482 AbstractCegarLoop]: Abstraction has 5941 states and 19799 transitions. [2021-06-05 23:49:08,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:08,084 INFO L276 IsEmpty]: Start isEmpty. Operand 5941 states and 19799 transitions. [2021-06-05 23:49:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:08,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:08,091 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:08,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 23:49:08,291 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash 3025900, now seen corresponding path program 97 times [2021-06-05 23:49:08,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:08,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251188623] [2021-06-05 23:49:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:08,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:08,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251188623] [2021-06-05 23:49:08,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251188623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:08,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977594952] [2021-06-05 23:49:08,603 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 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 23:49:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:08,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:49:08,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:08,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:08,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:08,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:08,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:08,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:49:08,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:08,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:08,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:08,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:08,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:08,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:08,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:49:08,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:08,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:08,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:08,865 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:49:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:08,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977594952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:08,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:08,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:49:08,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545099964] [2021-06-05 23:49:08,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:08,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:08,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:08,882 INFO L87 Difference]: Start difference. First operand 5941 states and 19799 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:11,559 INFO L93 Difference]: Finished difference Result 7190 states and 23550 transitions. [2021-06-05 23:49:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:49:11,559 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:11,569 INFO L225 Difference]: With dead ends: 7190 [2021-06-05 23:49:11,569 INFO L226 Difference]: Without dead ends: 7164 [2021-06-05 23:49:11,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 2136.9ms TimeCoverageRelationStatistics Valid=538, Invalid=3752, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:49:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7164 states. [2021-06-05 23:49:11,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7164 to 5945. [2021-06-05 23:49:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5945 states, 5944 states have (on average 3.3315948855989235) internal successors, (19803), 5944 states have internal predecessors, (19803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5945 states to 5945 states and 19803 transitions. [2021-06-05 23:49:11,648 INFO L78 Accepts]: Start accepts. Automaton has 5945 states and 19803 transitions. Word has length 30 [2021-06-05 23:49:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:11,648 INFO L482 AbstractCegarLoop]: Abstraction has 5945 states and 19803 transitions. [2021-06-05 23:49:11,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 5945 states and 19803 transitions. [2021-06-05 23:49:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:11,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:11,655 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:11,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:11,856 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:11,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1941268104, now seen corresponding path program 98 times [2021-06-05 23:49:11,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:11,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26302976] [2021-06-05 23:49:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:12,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:12,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26302976] [2021-06-05 23:49:12,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26302976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:12,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156867167] [2021-06-05 23:49:12,166 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 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 23:49:12,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:12,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:12,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:49:12,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:12,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:12,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:49:12,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:12,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:12,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:12,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:12,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:12,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:49:12,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:12,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:12,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:12,404 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:7 [2021-06-05 23:49:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:12,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156867167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:12,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:12,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:49:12,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294308313] [2021-06-05 23:49:12,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:12,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:12,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:12,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:12,442 INFO L87 Difference]: Start difference. First operand 5945 states and 19803 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:14,460 INFO L93 Difference]: Finished difference Result 6985 states and 22978 transitions. [2021-06-05 23:49:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:49:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:14,470 INFO L225 Difference]: With dead ends: 6985 [2021-06-05 23:49:14,470 INFO L226 Difference]: Without dead ends: 6959 [2021-06-05 23:49:14,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1622.4ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:49:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2021-06-05 23:49:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 5931. [2021-06-05 23:49:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5931 states, 5930 states have (on average 3.333558178752108) internal successors, (19768), 5930 states have internal predecessors, (19768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5931 states to 5931 states and 19768 transitions. [2021-06-05 23:49:14,549 INFO L78 Accepts]: Start accepts. Automaton has 5931 states and 19768 transitions. Word has length 30 [2021-06-05 23:49:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:14,549 INFO L482 AbstractCegarLoop]: Abstraction has 5931 states and 19768 transitions. [2021-06-05 23:49:14,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5931 states and 19768 transitions. [2021-06-05 23:49:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:14,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:14,556 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:14,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:14,756 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:14,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:14,757 INFO L82 PathProgramCache]: Analyzing trace with hash -424061568, now seen corresponding path program 99 times [2021-06-05 23:49:14,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:14,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592927812] [2021-06-05 23:49:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:15,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:15,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592927812] [2021-06-05 23:49:15,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592927812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813022318] [2021-06-05 23:49:15,095 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 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 23:49:15,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:49:15,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:49:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:15,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:15,405 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 23:49:15,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 179 [2021-06-05 23:49:15,411 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,429 INFO L628 ElimStorePlain]: treesize reduction 54, result has 38.6 percent of original size [2021-06-05 23:49:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:15,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:15,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:49:15,433 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:15,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:15,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:202, output treesize:18 [2021-06-05 23:49:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:15,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813022318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:15,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:15,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:49:15,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110707504] [2021-06-05 23:49:15,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:49:15,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:15,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:49:15,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:49:15,531 INFO L87 Difference]: Start difference. First operand 5931 states and 19768 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:17,763 INFO L93 Difference]: Finished difference Result 7175 states and 23479 transitions. [2021-06-05 23:49:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:49:17,763 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:17,773 INFO L225 Difference]: With dead ends: 7175 [2021-06-05 23:49:17,773 INFO L226 Difference]: Without dead ends: 7134 [2021-06-05 23:49:17,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1815.1ms TimeCoverageRelationStatistics Valid=479, Invalid=3681, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:49:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2021-06-05 23:49:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 5949. [2021-06-05 23:49:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 5948 states have (on average 3.3310356422326834) internal successors, (19813), 5948 states have internal predecessors, (19813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 19813 transitions. [2021-06-05 23:49:17,851 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 19813 transitions. Word has length 30 [2021-06-05 23:49:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:17,851 INFO L482 AbstractCegarLoop]: Abstraction has 5949 states and 19813 transitions. [2021-06-05 23:49:17,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 19813 transitions. [2021-06-05 23:49:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:17,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:17,858 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:18,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:18,059 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:18,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:18,059 INFO L82 PathProgramCache]: Analyzing trace with hash 73171608, now seen corresponding path program 100 times [2021-06-05 23:49:18,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:18,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647346034] [2021-06-05 23:49:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:18,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:18,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647346034] [2021-06-05 23:49:18,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647346034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:18,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113202638] [2021-06-05 23:49:18,377 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 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 23:49:18,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:18,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:49:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:18,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:18,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:18,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:49:18,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:18,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:18,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:49:18,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:18,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:18,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:18,645 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:49:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:18,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113202638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:18,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:18,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:49:18,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255646036] [2021-06-05 23:49:18,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:18,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:18,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:18,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:18,667 INFO L87 Difference]: Start difference. First operand 5949 states and 19813 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:49:20,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:20,419 INFO L93 Difference]: Finished difference Result 7030 states and 23085 transitions. [2021-06-05 23:49:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:49:20,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) Word has length 30 [2021-06-05 23:49:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:20,430 INFO L225 Difference]: With dead ends: 7030 [2021-06-05 23:49:20,430 INFO L226 Difference]: Without dead ends: 7004 [2021-06-05 23:49:20,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1520.6ms TimeCoverageRelationStatistics Valid=418, Invalid=2444, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:49:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7004 states. [2021-06-05 23:49:20,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7004 to 5937. [2021-06-05 23:49:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5937 states, 5936 states have (on average 3.332041778975741) internal successors, (19779), 5936 states have internal predecessors, (19779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5937 states to 5937 states and 19779 transitions. [2021-06-05 23:49:20,516 INFO L78 Accepts]: Start accepts. Automaton has 5937 states and 19779 transitions. Word has length 30 [2021-06-05 23:49:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:20,516 INFO L482 AbstractCegarLoop]: Abstraction has 5937 states and 19779 transitions. [2021-06-05 23:49:20,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:49:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 5937 states and 19779 transitions. [2021-06-05 23:49:20,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:20,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:20,523 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:20,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:20,725 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:20,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1317441520, now seen corresponding path program 101 times [2021-06-05 23:49:20,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:20,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589475539] [2021-06-05 23:49:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:21,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:21,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589475539] [2021-06-05 23:49:21,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589475539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:21,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496360181] [2021-06-05 23:49:21,056 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 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 23:49:21,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:49:21,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:21,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:49:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:21,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:21,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:21,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:21,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:21,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:49:21,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:21,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:21,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:21,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:21,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:21,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:49:21,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:21,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:21,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:21,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:49:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:21,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496360181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:21,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:21,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:49:21,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833345188] [2021-06-05 23:49:21,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:21,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:21,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:21,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:21,340 INFO L87 Difference]: Start difference. First operand 5937 states and 19779 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:23,258 INFO L93 Difference]: Finished difference Result 7261 states and 23673 transitions. [2021-06-05 23:49:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:49:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:23,268 INFO L225 Difference]: With dead ends: 7261 [2021-06-05 23:49:23,268 INFO L226 Difference]: Without dead ends: 7231 [2021-06-05 23:49:23,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1740.0ms TimeCoverageRelationStatistics Valid=556, Invalid=3226, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:49:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7231 states. [2021-06-05 23:49:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7231 to 5949. [2021-06-05 23:49:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 5948 states have (on average 3.332044384667115) internal successors, (19819), 5948 states have internal predecessors, (19819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 19819 transitions. [2021-06-05 23:49:23,349 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 19819 transitions. Word has length 30 [2021-06-05 23:49:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:23,350 INFO L482 AbstractCegarLoop]: Abstraction has 5949 states and 19819 transitions. [2021-06-05 23:49:23,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 19819 transitions. [2021-06-05 23:49:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:23,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:23,357 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:23,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 23:49:23,560 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash -839017840, now seen corresponding path program 102 times [2021-06-05 23:49:23,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:23,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291911772] [2021-06-05 23:49:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:23,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:23,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291911772] [2021-06-05 23:49:23,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291911772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:23,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596429707] [2021-06-05 23:49:23,933 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 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 23:49:23,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:49:23,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:49:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:24,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:24,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:24,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:24,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:24,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:49:24,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:24,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:24,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:24,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:24,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:24,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:24,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:49:24,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:24,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:24,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:24,156 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:49:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:24,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596429707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:24,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:24,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:49:24,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457224088] [2021-06-05 23:49:24,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:24,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:24,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:24,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:24,188 INFO L87 Difference]: Start difference. First operand 5949 states and 19819 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:49:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:25,455 INFO L93 Difference]: Finished difference Result 7025 states and 23092 transitions. [2021-06-05 23:49:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:49:25,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) Word has length 30 [2021-06-05 23:49:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:25,468 INFO L225 Difference]: With dead ends: 7025 [2021-06-05 23:49:25,469 INFO L226 Difference]: Without dead ends: 6999 [2021-06-05 23:49:25,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1253.4ms TimeCoverageRelationStatistics Valid=329, Invalid=1741, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:49:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6999 states. [2021-06-05 23:49:25,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6999 to 5937. [2021-06-05 23:49:25,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5937 states, 5936 states have (on average 3.3337264150943398) internal successors, (19789), 5936 states have internal predecessors, (19789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5937 states to 5937 states and 19789 transitions. [2021-06-05 23:49:25,553 INFO L78 Accepts]: Start accepts. Automaton has 5937 states and 19789 transitions. Word has length 30 [2021-06-05 23:49:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:25,553 INFO L482 AbstractCegarLoop]: Abstraction has 5937 states and 19789 transitions. [2021-06-05 23:49:25,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:49:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 5937 states and 19789 transitions. [2021-06-05 23:49:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:25,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:25,560 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:25,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 23:49:25,761 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash -646911237, now seen corresponding path program 89 times [2021-06-05 23:49:25,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:25,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419586070] [2021-06-05 23:49:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:25,955 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 23:49:25,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:25,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419586070] [2021-06-05 23:49:25,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419586070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:25,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006140321] [2021-06-05 23:49:25,955 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 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 23:49:25,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:49:25,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:25,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:49:25,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:26,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:26,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:49:26,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:26,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:26,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:26,225 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:49:26,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:26,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:26,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:26,230 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:49:26,245 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 23:49:26,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006140321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:26,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:26,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:49:26,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250197362] [2021-06-05 23:49:26,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:26,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:26,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:26,246 INFO L87 Difference]: Start difference. First operand 5937 states and 19789 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:27,608 INFO L93 Difference]: Finished difference Result 7473 states and 24570 transitions. [2021-06-05 23:49:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:49:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:27,619 INFO L225 Difference]: With dead ends: 7473 [2021-06-05 23:49:27,620 INFO L226 Difference]: Without dead ends: 7458 [2021-06-05 23:49:27,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1139.8ms TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:49:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7458 states. [2021-06-05 23:49:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7458 to 5941. [2021-06-05 23:49:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5941 states, 5940 states have (on average 3.333838383838384) internal successors, (19803), 5940 states have internal predecessors, (19803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5941 states to 5941 states and 19803 transitions. [2021-06-05 23:49:27,704 INFO L78 Accepts]: Start accepts. Automaton has 5941 states and 19803 transitions. Word has length 30 [2021-06-05 23:49:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:27,704 INFO L482 AbstractCegarLoop]: Abstraction has 5941 states and 19803 transitions. [2021-06-05 23:49:27,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 5941 states and 19803 transitions. [2021-06-05 23:49:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:27,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:27,711 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:27,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:27,912 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:27,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1493059333, now seen corresponding path program 90 times [2021-06-05 23:49:27,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:27,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79152376] [2021-06-05 23:49:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:28,110 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 23:49:28,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:28,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79152376] [2021-06-05 23:49:28,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79152376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:28,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050047480] [2021-06-05 23:49:28,110 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 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 23:49:28,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:49:28,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:28,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:49:28,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:28,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:49:28,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:49:28,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,408 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:49:28,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:49:28,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:28,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:49:28,413 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:28,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:28,432 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:40, output treesize:34 [2021-06-05 23:49:28,586 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 23:49:28,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050047480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:28,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:28,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 23:49:28,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727011762] [2021-06-05 23:49:28,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:49:28,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:28,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:49:28,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:49:28,587 INFO L87 Difference]: Start difference. First operand 5941 states and 19803 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:31,309 INFO L93 Difference]: Finished difference Result 7418 states and 24149 transitions. [2021-06-05 23:49:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:49:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:31,321 INFO L225 Difference]: With dead ends: 7418 [2021-06-05 23:49:31,321 INFO L226 Difference]: Without dead ends: 7384 [2021-06-05 23:49:31,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2066.3ms TimeCoverageRelationStatistics Valid=478, Invalid=3944, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:49:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7384 states. [2021-06-05 23:49:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7384 to 5915. [2021-06-05 23:49:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5915 states, 5914 states have (on average 3.334122421373013) internal successors, (19718), 5914 states have internal predecessors, (19718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5915 states to 5915 states and 19718 transitions. [2021-06-05 23:49:31,414 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 19718 transitions. Word has length 30 [2021-06-05 23:49:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:31,414 INFO L482 AbstractCegarLoop]: Abstraction has 5915 states and 19718 transitions. [2021-06-05 23:49:31,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 19718 transitions. [2021-06-05 23:49:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:31,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:31,421 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:31,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-06-05 23:49:31,622 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:31,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:31,622 INFO L82 PathProgramCache]: Analyzing trace with hash 346439685, now seen corresponding path program 91 times [2021-06-05 23:49:31,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:31,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185808987] [2021-06-05 23:49:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:31,821 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 23:49:31,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:31,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185808987] [2021-06-05 23:49:31,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185808987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:31,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741226880] [2021-06-05 23:49:31,821 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 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 23:49:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:31,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:49:31,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:32,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:32,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:32,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:32,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-06-05 23:49:32,035 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:32,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:32,042 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:49:32,044 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:32,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:32,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:32,050 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:17 [2021-06-05 23:49:32,096 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 23:49:32,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741226880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:32,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:32,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:49:32,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024525684] [2021-06-05 23:49:32,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:49:32,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:32,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:49:32,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:49:32,097 INFO L87 Difference]: Start difference. First operand 5915 states and 19718 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:34,109 INFO L93 Difference]: Finished difference Result 8453 states and 27614 transitions. [2021-06-05 23:49:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:49:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:34,121 INFO L225 Difference]: With dead ends: 8453 [2021-06-05 23:49:34,122 INFO L226 Difference]: Without dead ends: 8428 [2021-06-05 23:49:34,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1569.2ms TimeCoverageRelationStatistics Valid=441, Invalid=2529, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:49:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2021-06-05 23:49:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 5843. [2021-06-05 23:49:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5843 states, 5842 states have (on average 3.3289969188634028) internal successors, (19448), 5842 states have internal predecessors, (19448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5843 states to 5843 states and 19448 transitions. [2021-06-05 23:49:34,219 INFO L78 Accepts]: Start accepts. Automaton has 5843 states and 19448 transitions. Word has length 30 [2021-06-05 23:49:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:34,220 INFO L482 AbstractCegarLoop]: Abstraction has 5843 states and 19448 transitions. [2021-06-05 23:49:34,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 5843 states and 19448 transitions. [2021-06-05 23:49:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:34,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:34,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:34,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:34,428 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:34,428 INFO L82 PathProgramCache]: Analyzing trace with hash -2123448255, now seen corresponding path program 92 times [2021-06-05 23:49:34,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:34,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652341211] [2021-06-05 23:49:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:34,649 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 23:49:34,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:34,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652341211] [2021-06-05 23:49:34,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652341211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:34,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100866908] [2021-06-05 23:49:34,649 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 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 23:49:34,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:34,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:34,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:49:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:34,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:34,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:34,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:49:34,905 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:34,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:34,914 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:49:34,916 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:34,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:34,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:34,925 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:19 [2021-06-05 23:49:34,970 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 23:49:34,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100866908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:34,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:34,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:49:34,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105662621] [2021-06-05 23:49:34,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:34,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:34,971 INFO L87 Difference]: Start difference. First operand 5843 states and 19448 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:36,189 INFO L93 Difference]: Finished difference Result 7171 states and 23521 transitions. [2021-06-05 23:49:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:49:36,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:36,199 INFO L225 Difference]: With dead ends: 7171 [2021-06-05 23:49:36,200 INFO L226 Difference]: Without dead ends: 7123 [2021-06-05 23:49:36,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1038.7ms TimeCoverageRelationStatistics Valid=267, Invalid=1713, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:49:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7123 states. [2021-06-05 23:49:36,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7123 to 5747. [2021-06-05 23:49:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5747 states, 5746 states have (on average 3.3214410024364773) internal successors, (19085), 5746 states have internal predecessors, (19085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5747 states to 5747 states and 19085 transitions. [2021-06-05 23:49:36,284 INFO L78 Accepts]: Start accepts. Automaton has 5747 states and 19085 transitions. Word has length 30 [2021-06-05 23:49:36,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:36,284 INFO L482 AbstractCegarLoop]: Abstraction has 5747 states and 19085 transitions. [2021-06-05 23:49:36,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:36,284 INFO L276 IsEmpty]: Start isEmpty. Operand 5747 states and 19085 transitions. [2021-06-05 23:49:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:36,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:36,290 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:36,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-05 23:49:36,491 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:36,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:36,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1746026009, now seen corresponding path program 93 times [2021-06-05 23:49:36,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:36,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261804700] [2021-06-05 23:49:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:36,718 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 23:49:36,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:36,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261804700] [2021-06-05 23:49:36,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261804700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:36,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117354077] [2021-06-05 23:49:36,719 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 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 23:49:36,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:49:36,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:36,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:49:36,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:36,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:36,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:36,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:49:36,904 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:36,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:36,913 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:49:36,914 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:36,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:36,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:36,923 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:28 [2021-06-05 23:49:36,992 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 23:49:36,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117354077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:36,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:36,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:49:36,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395343066] [2021-06-05 23:49:36,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:49:36,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:49:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:49:36,993 INFO L87 Difference]: Start difference. First operand 5747 states and 19085 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:37,677 INFO L93 Difference]: Finished difference Result 7258 states and 23846 transitions. [2021-06-05 23:49:37,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:49:37,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:37,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:37,688 INFO L225 Difference]: With dead ends: 7258 [2021-06-05 23:49:37,688 INFO L226 Difference]: Without dead ends: 7233 [2021-06-05 23:49:37,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 755.3ms TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:49:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7233 states. [2021-06-05 23:49:37,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7233 to 5702. [2021-06-05 23:49:37,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5702 states, 5701 states have (on average 3.323452025960358) internal successors, (18947), 5701 states have internal predecessors, (18947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5702 states to 5702 states and 18947 transitions. [2021-06-05 23:49:37,773 INFO L78 Accepts]: Start accepts. Automaton has 5702 states and 18947 transitions. Word has length 30 [2021-06-05 23:49:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:37,773 INFO L482 AbstractCegarLoop]: Abstraction has 5702 states and 18947 transitions. [2021-06-05 23:49:37,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5702 states and 18947 transitions. [2021-06-05 23:49:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:37,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:37,781 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:37,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:37,981 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:37,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:37,982 INFO L82 PathProgramCache]: Analyzing trace with hash -667660107, now seen corresponding path program 94 times [2021-06-05 23:49:37,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:37,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543225935] [2021-06-05 23:49:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:38,193 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 23:49:38,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:38,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543225935] [2021-06-05 23:49:38,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543225935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:38,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693806737] [2021-06-05 23:49:38,193 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 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 23:49:38,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:38,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:38,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:49:38,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:38,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:38,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:38,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:49:38,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:49:38,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:38,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:38,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:49:38,433 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:38,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:38,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:38,450 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:49:38,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:49:38,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:38,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:38,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:38,470 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:57 [2021-06-05 23:49:38,587 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 23:49:38,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693806737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:38,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:38,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:49:38,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439807426] [2021-06-05 23:49:38,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:38,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:38,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:38,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:38,588 INFO L87 Difference]: Start difference. First operand 5702 states and 18947 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:39,577 INFO L93 Difference]: Finished difference Result 7572 states and 24899 transitions. [2021-06-05 23:49:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:49:39,577 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:39,588 INFO L225 Difference]: With dead ends: 7572 [2021-06-05 23:49:39,588 INFO L226 Difference]: Without dead ends: 7547 [2021-06-05 23:49:39,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1021.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:49:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7547 states. [2021-06-05 23:49:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7547 to 5688. [2021-06-05 23:49:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5688 states, 5687 states have (on average 3.324248285563566) internal successors, (18905), 5687 states have internal predecessors, (18905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5688 states to 5688 states and 18905 transitions. [2021-06-05 23:49:39,669 INFO L78 Accepts]: Start accepts. Automaton has 5688 states and 18905 transitions. Word has length 30 [2021-06-05 23:49:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:39,669 INFO L482 AbstractCegarLoop]: Abstraction has 5688 states and 18905 transitions. [2021-06-05 23:49:39,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 5688 states and 18905 transitions. [2021-06-05 23:49:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:39,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:39,675 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:39,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 23:49:39,876 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1823368763, now seen corresponding path program 95 times [2021-06-05 23:49:39,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:39,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354930076] [2021-06-05 23:49:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:40,094 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 23:49:40,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:40,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354930076] [2021-06-05 23:49:40,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354930076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:40,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445360301] [2021-06-05 23:49:40,095 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 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 23:49:40,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:49:40,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:49:40,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:40,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:40,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:49:40,402 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:40,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:40,413 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:49:40,415 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:40,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:40,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:40,426 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:45, output treesize:21 [2021-06-05 23:49:40,507 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 23:49:40,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445360301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:40,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:40,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:49:40,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818816748] [2021-06-05 23:49:40,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:49:40,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:40,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:49:40,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:49:40,507 INFO L87 Difference]: Start difference. First operand 5688 states and 18905 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:42,853 INFO L93 Difference]: Finished difference Result 7641 states and 25049 transitions. [2021-06-05 23:49:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:49:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:42,865 INFO L225 Difference]: With dead ends: 7641 [2021-06-05 23:49:42,865 INFO L226 Difference]: Without dead ends: 7611 [2021-06-05 23:49:42,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1524.4ms TimeCoverageRelationStatistics Valid=486, Invalid=3174, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:49:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7611 states. [2021-06-05 23:49:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7611 to 5689. [2021-06-05 23:49:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5689 states, 5688 states have (on average 3.3252461322081577) internal successors, (18914), 5688 states have internal predecessors, (18914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5689 states to 5689 states and 18914 transitions. [2021-06-05 23:49:42,946 INFO L78 Accepts]: Start accepts. Automaton has 5689 states and 18914 transitions. Word has length 30 [2021-06-05 23:49:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:42,946 INFO L482 AbstractCegarLoop]: Abstraction has 5689 states and 18914 transitions. [2021-06-05 23:49:42,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5689 states and 18914 transitions. [2021-06-05 23:49:42,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:42,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:42,953 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:43,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:43,153 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:43,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:43,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1331267863, now seen corresponding path program 96 times [2021-06-05 23:49:43,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:43,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368302327] [2021-06-05 23:49:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:43,352 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 23:49:43,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368302327] [2021-06-05 23:49:43,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368302327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670270946] [2021-06-05 23:49:43,352 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 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 23:49:43,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:49:43,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:49:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:43,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:43,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:43,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:49:43,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:43,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:43,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:43,606 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:49:43,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:43,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:43,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:43,612 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:49:43,627 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 23:49:43,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670270946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:43,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:43,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:49:43,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368209792] [2021-06-05 23:49:43,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:49:43,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:43,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:49:43,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:49:43,628 INFO L87 Difference]: Start difference. First operand 5689 states and 18914 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:44,971 INFO L93 Difference]: Finished difference Result 6969 states and 22828 transitions. [2021-06-05 23:49:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:49:44,972 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:44,982 INFO L225 Difference]: With dead ends: 6969 [2021-06-05 23:49:44,982 INFO L226 Difference]: Without dead ends: 6944 [2021-06-05 23:49:44,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1115.2ms TimeCoverageRelationStatistics Valid=330, Invalid=1832, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:49:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6944 states. [2021-06-05 23:49:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6944 to 5716. [2021-06-05 23:49:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5716 states, 5715 states have (on average 3.3289588801399823) internal successors, (19025), 5715 states have internal predecessors, (19025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5716 states to 5716 states and 19025 transitions. [2021-06-05 23:49:45,059 INFO L78 Accepts]: Start accepts. Automaton has 5716 states and 19025 transitions. Word has length 30 [2021-06-05 23:49:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:45,059 INFO L482 AbstractCegarLoop]: Abstraction has 5716 states and 19025 transitions. [2021-06-05 23:49:45,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5716 states and 19025 transitions. [2021-06-05 23:49:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:45,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:45,066 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:45,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:45,266 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:45,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:45,266 INFO L82 PathProgramCache]: Analyzing trace with hash -926069069, now seen corresponding path program 97 times [2021-06-05 23:49:45,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:45,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594753210] [2021-06-05 23:49:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:45,467 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 23:49:45,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:45,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594753210] [2021-06-05 23:49:45,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594753210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:45,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203503272] [2021-06-05 23:49:45,467 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 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 23:49:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:45,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:49:45,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:45,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:45,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:45,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:45,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:45,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:45,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 23:49:45,699 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:45,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:45,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:45,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:49:45,710 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:45,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:45,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:45,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:49:45,763 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 23:49:45,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203503272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:45,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:45,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:49:45,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418824304] [2021-06-05 23:49:45,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:49:45,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:45,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:49:45,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:49:45,764 INFO L87 Difference]: Start difference. First operand 5716 states and 19025 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:47,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:47,770 INFO L93 Difference]: Finished difference Result 7928 states and 25815 transitions. [2021-06-05 23:49:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:49:47,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:47,782 INFO L225 Difference]: With dead ends: 7928 [2021-06-05 23:49:47,782 INFO L226 Difference]: Without dead ends: 7872 [2021-06-05 23:49:47,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1567.1ms TimeCoverageRelationStatistics Valid=482, Invalid=2488, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:49:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7872 states. [2021-06-05 23:49:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7872 to 5693. [2021-06-05 23:49:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5693 states, 5692 states have (on average 3.325017568517217) internal successors, (18926), 5692 states have internal predecessors, (18926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5693 states to 5693 states and 18926 transitions. [2021-06-05 23:49:47,876 INFO L78 Accepts]: Start accepts. Automaton has 5693 states and 18926 transitions. Word has length 30 [2021-06-05 23:49:47,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:47,876 INFO L482 AbstractCegarLoop]: Abstraction has 5693 states and 18926 transitions. [2021-06-05 23:49:47,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5693 states and 18926 transitions. [2021-06-05 23:49:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:47,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:47,882 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:48,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 23:49:48,083 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:48,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash 853701365, now seen corresponding path program 98 times [2021-06-05 23:49:48,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:48,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056571097] [2021-06-05 23:49:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:48,289 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 23:49:48,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:48,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056571097] [2021-06-05 23:49:48,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056571097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:48,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066089880] [2021-06-05 23:49:48,289 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 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 23:49:48,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:48,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:49:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:48,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:48,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:48,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:48,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:49:48,493 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:48,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:48,504 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:49:48,506 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:48,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:48,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:48,515 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:49:48,582 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 23:49:48,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066089880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:48,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:48,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:49:48,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659329993] [2021-06-05 23:49:48,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:49:48,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:48,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:49:48,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:49:48,583 INFO L87 Difference]: Start difference. First operand 5693 states and 18926 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:49,772 INFO L93 Difference]: Finished difference Result 7249 states and 23804 transitions. [2021-06-05 23:49:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:49:49,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:49,782 INFO L225 Difference]: With dead ends: 7249 [2021-06-05 23:49:49,783 INFO L226 Difference]: Without dead ends: 7199 [2021-06-05 23:49:49,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1108.2ms TimeCoverageRelationStatistics Valid=458, Invalid=1992, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:49:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7199 states. [2021-06-05 23:49:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7199 to 5677. [2021-06-05 23:49:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 3.3259337561663145) internal successors, (18878), 5676 states have internal predecessors, (18878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 18878 transitions. [2021-06-05 23:49:49,864 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 18878 transitions. Word has length 30 [2021-06-05 23:49:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:49,864 INFO L482 AbstractCegarLoop]: Abstraction has 5677 states and 18878 transitions. [2021-06-05 23:49:49,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 18878 transitions. [2021-06-05 23:49:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:49,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:49,872 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:50,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 23:49:50,072 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:50,072 INFO L82 PathProgramCache]: Analyzing trace with hash -761420365, now seen corresponding path program 99 times [2021-06-05 23:49:50,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:50,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246785153] [2021-06-05 23:49:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:50,313 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 23:49:50,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:50,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246785153] [2021-06-05 23:49:50,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246785153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:50,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144256649] [2021-06-05 23:49:50,313 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 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 23:49:50,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:49:50,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:50,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:49:50,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:50,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:50,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:50,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:49:50,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:49:50,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:50,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:50,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:49:50,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:50,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:50,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:50,585 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:49:50,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:49:50,586 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:50,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:50,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:50,605 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:40, output treesize:44 [2021-06-05 23:49:50,722 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 23:49:50,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144256649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:50,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:50,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:49:50,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633085231] [2021-06-05 23:49:50,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:50,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:50,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:50,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:50,723 INFO L87 Difference]: Start difference. First operand 5677 states and 18878 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:51,930 INFO L93 Difference]: Finished difference Result 6309 states and 20874 transitions. [2021-06-05 23:49:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:49:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:51,939 INFO L225 Difference]: With dead ends: 6309 [2021-06-05 23:49:51,939 INFO L226 Difference]: Without dead ends: 6280 [2021-06-05 23:49:51,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1216.7ms TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:49:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2021-06-05 23:49:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 5644. [2021-06-05 23:49:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5644 states, 5643 states have (on average 3.3273081694134325) internal successors, (18776), 5643 states have internal predecessors, (18776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5644 states to 5644 states and 18776 transitions. [2021-06-05 23:49:52,014 INFO L78 Accepts]: Start accepts. Automaton has 5644 states and 18776 transitions. Word has length 30 [2021-06-05 23:49:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:52,014 INFO L482 AbstractCegarLoop]: Abstraction has 5644 states and 18776 transitions. [2021-06-05 23:49:52,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5644 states and 18776 transitions. [2021-06-05 23:49:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:52,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:52,020 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:52,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 23:49:52,221 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1136551761, now seen corresponding path program 100 times [2021-06-05 23:49:52,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:52,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984519526] [2021-06-05 23:49:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:52,511 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 23:49:52,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:52,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984519526] [2021-06-05 23:49:52,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984519526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:52,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784574746] [2021-06-05 23:49:52,512 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 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 23:49:52,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:52,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:49:52,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:52,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:52,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:52,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:49:52,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:52,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:52,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:52,789 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:49:52,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:52,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:52,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:52,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-06-05 23:49:52,811 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 23:49:52,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784574746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:52,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:52,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:49:52,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967747398] [2021-06-05 23:49:52,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:52,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:52,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:52,812 INFO L87 Difference]: Start difference. First operand 5644 states and 18776 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:53,519 INFO L93 Difference]: Finished difference Result 6964 states and 22829 transitions. [2021-06-05 23:49:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:49:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:53,529 INFO L225 Difference]: With dead ends: 6964 [2021-06-05 23:49:53,530 INFO L226 Difference]: Without dead ends: 6949 [2021-06-05 23:49:53,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 763.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:49:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6949 states. [2021-06-05 23:49:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6949 to 5659. [2021-06-05 23:49:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 3.3275008837044893) internal successors, (18827), 5658 states have internal predecessors, (18827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 18827 transitions. [2021-06-05 23:49:53,606 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 18827 transitions. Word has length 30 [2021-06-05 23:49:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:53,606 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 18827 transitions. [2021-06-05 23:49:53,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 18827 transitions. [2021-06-05 23:49:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:53,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:53,613 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:53,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:53,813 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:53,813 INFO L82 PathProgramCache]: Analyzing trace with hash 554613039, now seen corresponding path program 101 times [2021-06-05 23:49:53,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:53,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744529355] [2021-06-05 23:49:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:54,029 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 23:49:54,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:54,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744529355] [2021-06-05 23:49:54,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744529355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:54,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613047829] [2021-06-05 23:49:54,030 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 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 23:49:54,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:49:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:54,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:49:54,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:54,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:54,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:54,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:49:54,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:54,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:54,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:54,276 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:49:54,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:54,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:54,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:54,281 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:49:54,302 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 23:49:54,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613047829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:54,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:54,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:49:54,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608607801] [2021-06-05 23:49:54,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:54,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:54,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:54,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:54,303 INFO L87 Difference]: Start difference. First operand 5659 states and 18827 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:55,848 INFO L93 Difference]: Finished difference Result 7910 states and 25828 transitions. [2021-06-05 23:49:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:49:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:55,860 INFO L225 Difference]: With dead ends: 7910 [2021-06-05 23:49:55,861 INFO L226 Difference]: Without dead ends: 7889 [2021-06-05 23:49:55,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1285.0ms TimeCoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:49:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7889 states. [2021-06-05 23:49:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7889 to 5775. [2021-06-05 23:49:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5774 states have (on average 3.326117076550052) internal successors, (19205), 5774 states have internal predecessors, (19205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 19205 transitions. [2021-06-05 23:49:55,951 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 19205 transitions. Word has length 30 [2021-06-05 23:49:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:55,951 INFO L482 AbstractCegarLoop]: Abstraction has 5775 states and 19205 transitions. [2021-06-05 23:49:55,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 19205 transitions. [2021-06-05 23:49:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:55,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:55,958 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:56,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 23:49:56,159 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:56,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:56,159 INFO L82 PathProgramCache]: Analyzing trace with hash 681434367, now seen corresponding path program 102 times [2021-06-05 23:49:56,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:56,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937492697] [2021-06-05 23:49:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:56,383 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 23:49:56,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:56,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937492697] [2021-06-05 23:49:56,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937492697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:56,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357809410] [2021-06-05 23:49:56,383 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 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 23:49:56,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:49:56,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:56,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:49:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:56,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:56,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:49:56,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:49:56,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:56,631 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:49:56,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:49:56,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:56,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:49:56,636 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:56,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:56,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:56,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:56,655 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:40, output treesize:34 [2021-06-05 23:49:56,787 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 23:49:56,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357809410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:56,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:56,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:49:56,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341329396] [2021-06-05 23:49:56,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:49:56,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:56,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:49:56,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:49:56,788 INFO L87 Difference]: Start difference. First operand 5775 states and 19205 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:59,056 INFO L93 Difference]: Finished difference Result 7627 states and 24895 transitions. [2021-06-05 23:49:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:49:59,057 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:59,068 INFO L225 Difference]: With dead ends: 7627 [2021-06-05 23:49:59,068 INFO L226 Difference]: Without dead ends: 7597 [2021-06-05 23:49:59,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 2030.6ms TimeCoverageRelationStatistics Valid=672, Invalid=3234, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:49:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7597 states. [2021-06-05 23:49:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7597 to 5753. [2021-06-05 23:49:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 3.3282336578581364) internal successors, (19144), 5752 states have internal predecessors, (19144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 19144 transitions. [2021-06-05 23:49:59,154 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 19144 transitions. Word has length 30 [2021-06-05 23:49:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:59,154 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 19144 transitions. [2021-06-05 23:49:59,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 19144 transitions. [2021-06-05 23:49:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:59,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:59,161 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:59,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:59,361 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1223686925, now seen corresponding path program 103 times [2021-06-05 23:49:59,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:59,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065270434] [2021-06-05 23:49:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:59,544 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 23:49:59,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:59,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065270434] [2021-06-05 23:49:59,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065270434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:59,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742166504] [2021-06-05 23:49:59,545 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 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 23:49:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:49:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:59,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:59,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:59,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:49:59,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:59,809 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:49:59,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:49:59,836 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 23:49:59,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742166504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:59,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:59,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:49:59,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325264590] [2021-06-05 23:49:59,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:49:59,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:49:59,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:49:59,837 INFO L87 Difference]: Start difference. First operand 5753 states and 19144 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:00,725 INFO L93 Difference]: Finished difference Result 7419 states and 24483 transitions. [2021-06-05 23:50:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:50:00,725 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:00,736 INFO L225 Difference]: With dead ends: 7419 [2021-06-05 23:50:00,736 INFO L226 Difference]: Without dead ends: 7394 [2021-06-05 23:50:00,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 797.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:50:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7394 states. [2021-06-05 23:50:00,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7394 to 5747. [2021-06-05 23:50:00,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5747 states, 5746 states have (on average 3.329098503306648) internal successors, (19129), 5746 states have internal predecessors, (19129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5747 states to 5747 states and 19129 transitions. [2021-06-05 23:50:00,815 INFO L78 Accepts]: Start accepts. Automaton has 5747 states and 19129 transitions. Word has length 30 [2021-06-05 23:50:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:00,815 INFO L482 AbstractCegarLoop]: Abstraction has 5747 states and 19129 transitions. [2021-06-05 23:50:00,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 5747 states and 19129 transitions. [2021-06-05 23:50:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:00,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:00,823 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:01,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:01,023 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:01,023 INFO L82 PathProgramCache]: Analyzing trace with hash -690820735, now seen corresponding path program 104 times [2021-06-05 23:50:01,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:01,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078615620] [2021-06-05 23:50:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:01,254 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 23:50:01,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:01,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078615620] [2021-06-05 23:50:01,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078615620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:01,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333184332] [2021-06-05 23:50:01,255 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 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 23:50:01,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:50:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:01,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:50:01,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:01,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:01,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:01,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:50:01,467 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:01,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:01,477 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:50:01,478 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:01,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:01,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:01,488 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:19 [2021-06-05 23:50:01,530 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 23:50:01,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333184332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:01,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:01,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:50:01,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245728962] [2021-06-05 23:50:01,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:50:01,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:50:01,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:50:01,531 INFO L87 Difference]: Start difference. First operand 5747 states and 19129 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:02,226 INFO L93 Difference]: Finished difference Result 7912 states and 25895 transitions. [2021-06-05 23:50:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:50:02,226 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:02,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:02,238 INFO L225 Difference]: With dead ends: 7912 [2021-06-05 23:50:02,239 INFO L226 Difference]: Without dead ends: 7882 [2021-06-05 23:50:02,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 740.0ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:50:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7882 states. [2021-06-05 23:50:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7882 to 5742. [2021-06-05 23:50:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5742 states, 5741 states have (on average 3.328514196133078) internal successors, (19109), 5741 states have internal predecessors, (19109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5742 states to 5742 states and 19109 transitions. [2021-06-05 23:50:02,334 INFO L78 Accepts]: Start accepts. Automaton has 5742 states and 19109 transitions. Word has length 30 [2021-06-05 23:50:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:02,334 INFO L482 AbstractCegarLoop]: Abstraction has 5742 states and 19109 transitions. [2021-06-05 23:50:02,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5742 states and 19109 transitions. [2021-06-05 23:50:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:02,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:02,341 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:02,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable560 [2021-06-05 23:50:02,542 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:02,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:02,542 INFO L82 PathProgramCache]: Analyzing trace with hash -644242611, now seen corresponding path program 105 times [2021-06-05 23:50:02,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:02,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801587249] [2021-06-05 23:50:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:02,757 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 23:50:02,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:02,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801587249] [2021-06-05 23:50:02,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801587249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:02,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605154627] [2021-06-05 23:50:02,757 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 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 23:50:02,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:50:02,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:50:02,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:02,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:02,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:02,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:50:02,948 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:02,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:02,957 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:50:02,958 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:02,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:02,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:02,968 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:28 [2021-06-05 23:50:03,046 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 23:50:03,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605154627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:03,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:03,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:50:03,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361088695] [2021-06-05 23:50:03,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:50:03,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:50:03,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:50:03,047 INFO L87 Difference]: Start difference. First operand 5742 states and 19109 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:03,701 INFO L93 Difference]: Finished difference Result 7358 states and 24210 transitions. [2021-06-05 23:50:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:50:03,701 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:03,712 INFO L225 Difference]: With dead ends: 7358 [2021-06-05 23:50:03,712 INFO L226 Difference]: Without dead ends: 7343 [2021-06-05 23:50:03,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=272, Invalid=988, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:50:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7343 states. [2021-06-05 23:50:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7343 to 5714. [2021-06-05 23:50:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5714 states, 5713 states have (on average 3.3299492385786804) internal successors, (19024), 5713 states have internal predecessors, (19024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5714 states to 5714 states and 19024 transitions. [2021-06-05 23:50:03,796 INFO L78 Accepts]: Start accepts. Automaton has 5714 states and 19024 transitions. Word has length 30 [2021-06-05 23:50:03,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:03,796 INFO L482 AbstractCegarLoop]: Abstraction has 5714 states and 19024 transitions. [2021-06-05 23:50:03,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 5714 states and 19024 transitions. [2021-06-05 23:50:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:03,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:03,804 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:04,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-05 23:50:04,005 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:04,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:04,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1825846597, now seen corresponding path program 106 times [2021-06-05 23:50:04,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:04,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851021947] [2021-06-05 23:50:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:04,173 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 23:50:04,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:04,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851021947] [2021-06-05 23:50:04,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851021947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:04,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332773693] [2021-06-05 23:50:04,174 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 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 23:50:04,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:50:04,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:50:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:04,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:04,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:04,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:50:04,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:04,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:04,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:04,444 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:50:04,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:04,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:04,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:04,449 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:50:04,470 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 23:50:04,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332773693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:04,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:04,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:50:04,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566962204] [2021-06-05 23:50:04,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:50:04,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:04,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:50:04,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:50:04,471 INFO L87 Difference]: Start difference. First operand 5714 states and 19024 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:05,322 INFO L93 Difference]: Finished difference Result 7501 states and 24741 transitions. [2021-06-05 23:50:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:50:05,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:05,335 INFO L225 Difference]: With dead ends: 7501 [2021-06-05 23:50:05,335 INFO L226 Difference]: Without dead ends: 7486 [2021-06-05 23:50:05,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 800.8ms TimeCoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:50:05,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2021-06-05 23:50:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 5705. [2021-06-05 23:50:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5704 states have (on average 3.3304698457223) internal successors, (18997), 5704 states have internal predecessors, (18997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 18997 transitions. [2021-06-05 23:50:05,416 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 18997 transitions. Word has length 30 [2021-06-05 23:50:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:05,416 INFO L482 AbstractCegarLoop]: Abstraction has 5705 states and 18997 transitions. [2021-06-05 23:50:05,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 18997 transitions. [2021-06-05 23:50:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:05,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:05,424 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:05,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-06-05 23:50:05,624 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:05,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1368762027, now seen corresponding path program 107 times [2021-06-05 23:50:05,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:05,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671306261] [2021-06-05 23:50:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:05,805 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 23:50:05,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:05,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671306261] [2021-06-05 23:50:05,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671306261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:05,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788935776] [2021-06-05 23:50:05,806 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 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 23:50:05,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:50:05,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:06,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:06,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:06,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:50:06,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:06,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:06,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:06,122 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:50:06,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:06,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:06,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:06,127 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:50:06,149 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 23:50:06,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788935776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:06,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:06,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:50:06,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386973791] [2021-06-05 23:50:06,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:50:06,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:06,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:50:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:50:06,150 INFO L87 Difference]: Start difference. First operand 5705 states and 18997 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:07,639 INFO L93 Difference]: Finished difference Result 7758 states and 25535 transitions. [2021-06-05 23:50:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:50:07,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:07,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:07,653 INFO L225 Difference]: With dead ends: 7758 [2021-06-05 23:50:07,653 INFO L226 Difference]: Without dead ends: 7733 [2021-06-05 23:50:07,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1199.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:50:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7733 states. [2021-06-05 23:50:07,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7733 to 5720. [2021-06-05 23:50:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 5719 states have (on average 3.3271550970449377) internal successors, (19028), 5719 states have internal predecessors, (19028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 19028 transitions. [2021-06-05 23:50:07,741 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 19028 transitions. Word has length 30 [2021-06-05 23:50:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:07,741 INFO L482 AbstractCegarLoop]: Abstraction has 5720 states and 19028 transitions. [2021-06-05 23:50:07,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 19028 transitions. [2021-06-05 23:50:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:07,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:07,748 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:07,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-06-05 23:50:07,949 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:07,949 INFO L82 PathProgramCache]: Analyzing trace with hash -753210211, now seen corresponding path program 108 times [2021-06-05 23:50:07,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:07,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680540365] [2021-06-05 23:50:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:08,162 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 23:50:08,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:08,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680540365] [2021-06-05 23:50:08,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680540365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:08,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124499398] [2021-06-05 23:50:08,162 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 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 23:50:08,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:50:08,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:50:08,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:08,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:08,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:08,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:08,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:50:08,364 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:08,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:08,372 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:50:08,374 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:08,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:08,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:08,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:50:08,445 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 23:50:08,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124499398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:08,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:08,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:50:08,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182869422] [2021-06-05 23:50:08,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:50:08,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:50:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:50:08,446 INFO L87 Difference]: Start difference. First operand 5720 states and 19028 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:09,751 INFO L93 Difference]: Finished difference Result 7261 states and 23933 transitions. [2021-06-05 23:50:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:50:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:09,762 INFO L225 Difference]: With dead ends: 7261 [2021-06-05 23:50:09,762 INFO L226 Difference]: Without dead ends: 7236 [2021-06-05 23:50:09,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1002.9ms TimeCoverageRelationStatistics Valid=303, Invalid=1859, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:50:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7236 states. [2021-06-05 23:50:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7236 to 5734. [2021-06-05 23:50:09,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5734 states, 5733 states have (on average 3.3263561834990405) internal successors, (19070), 5733 states have internal predecessors, (19070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5734 states to 5734 states and 19070 transitions. [2021-06-05 23:50:09,851 INFO L78 Accepts]: Start accepts. Automaton has 5734 states and 19070 transitions. Word has length 30 [2021-06-05 23:50:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:09,852 INFO L482 AbstractCegarLoop]: Abstraction has 5734 states and 19070 transitions. [2021-06-05 23:50:09,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5734 states and 19070 transitions. [2021-06-05 23:50:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:09,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:09,858 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:10,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:10,059 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1891488649, now seen corresponding path program 109 times [2021-06-05 23:50:10,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:10,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760083082] [2021-06-05 23:50:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:10,240 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 23:50:10,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760083082] [2021-06-05 23:50:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760083082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497213962] [2021-06-05 23:50:10,241 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 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 23:50:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:10,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:50:10,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:10,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:10,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:10,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:50:10,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:50:10,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:10,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:10,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:50:10,485 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:10,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:10,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:10,503 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:50:10,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:50:10,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:10,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:10,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:10,523 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:57 [2021-06-05 23:50:10,646 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 23:50:10,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497213962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:10,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:10,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:50:10,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169969164] [2021-06-05 23:50:10,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:50:10,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:50:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:50:10,647 INFO L87 Difference]: Start difference. First operand 5734 states and 19070 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:11,640 INFO L93 Difference]: Finished difference Result 7449 states and 24503 transitions. [2021-06-05 23:50:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:50:11,641 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:11,651 INFO L225 Difference]: With dead ends: 7449 [2021-06-05 23:50:11,651 INFO L226 Difference]: Without dead ends: 7424 [2021-06-05 23:50:11,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:50:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7424 states. [2021-06-05 23:50:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7424 to 5722. [2021-06-05 23:50:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5722 states, 5721 states have (on average 3.3275651109945814) internal successors, (19037), 5721 states have internal predecessors, (19037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5722 states to 5722 states and 19037 transitions. [2021-06-05 23:50:11,728 INFO L78 Accepts]: Start accepts. Automaton has 5722 states and 19037 transitions. Word has length 30 [2021-06-05 23:50:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:11,729 INFO L482 AbstractCegarLoop]: Abstraction has 5722 states and 19037 transitions. [2021-06-05 23:50:11,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 5722 states and 19037 transitions. [2021-06-05 23:50:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:11,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:11,735 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:11,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:11,936 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:11,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1215622697, now seen corresponding path program 110 times [2021-06-05 23:50:11,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:11,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775002616] [2021-06-05 23:50:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:12,140 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 23:50:12,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:12,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775002616] [2021-06-05 23:50:12,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775002616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:12,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28884522] [2021-06-05 23:50:12,140 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 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 23:50:12,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:50:12,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:12,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:50:12,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:12,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:12,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:50:12,334 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:12,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:12,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:50:12,343 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:12,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:12,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:12,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 23:50:12,421 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 23:50:12,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28884522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:12,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:12,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:50:12,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469539170] [2021-06-05 23:50:12,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:50:12,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:12,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:50:12,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:50:12,422 INFO L87 Difference]: Start difference. First operand 5722 states and 19037 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:13,293 INFO L93 Difference]: Finished difference Result 7412 states and 24401 transitions. [2021-06-05 23:50:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:50:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:13,304 INFO L225 Difference]: With dead ends: 7412 [2021-06-05 23:50:13,304 INFO L226 Difference]: Without dead ends: 7362 [2021-06-05 23:50:13,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:50:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2021-06-05 23:50:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 5713. [2021-06-05 23:50:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5713 states, 5712 states have (on average 3.3251050420168067) internal successors, (18993), 5712 states have internal predecessors, (18993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5713 states to 5713 states and 18993 transitions. [2021-06-05 23:50:13,387 INFO L78 Accepts]: Start accepts. Automaton has 5713 states and 18993 transitions. Word has length 30 [2021-06-05 23:50:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:13,387 INFO L482 AbstractCegarLoop]: Abstraction has 5713 states and 18993 transitions. [2021-06-05 23:50:13,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 5713 states and 18993 transitions. [2021-06-05 23:50:13,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:13,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:13,394 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:13,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:13,594 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:13,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:13,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1721288081, now seen corresponding path program 111 times [2021-06-05 23:50:13,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:13,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428657216] [2021-06-05 23:50:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:13,816 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 23:50:13,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:13,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428657216] [2021-06-05 23:50:13,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428657216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:13,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399933597] [2021-06-05 23:50:13,816 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 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 23:50:13,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:50:13,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:13,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:13,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:14,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:14,050 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-06-05 23:50:14,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:50:14,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:14,115 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-06-05 23:50:14,115 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 67 [2021-06-05 23:50:14,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:14,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:14,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 23:50:14,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:14,240 INFO L628 ElimStorePlain]: treesize reduction 8, result has 91.1 percent of original size [2021-06-05 23:50:14,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:14,252 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:44, output treesize:229 [2021-06-05 23:50:14,417 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 23:50:14,647 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 23:50:14,830 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 23:50:14,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399933597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:14,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:14,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 23:50:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126754036] [2021-06-05 23:50:14,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:50:14,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:14,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:50:14,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:50:14,831 INFO L87 Difference]: Start difference. First operand 5713 states and 18993 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:15,142 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 23:50:15,427 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-06-05 23:50:15,651 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2021-06-05 23:50:16,037 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-06-05 23:50:16,491 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2021-06-05 23:50:18,224 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 23:50:18,526 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 23:50:18,811 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-06-05 23:50:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:18,924 INFO L93 Difference]: Finished difference Result 8323 states and 27214 transitions. [2021-06-05 23:50:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:50:18,924 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:18,937 INFO L225 Difference]: With dead ends: 8323 [2021-06-05 23:50:18,937 INFO L226 Difference]: Without dead ends: 8283 [2021-06-05 23:50:18,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 4032.1ms TimeCoverageRelationStatistics Valid=702, Invalid=3588, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:50:18,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2021-06-05 23:50:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 5753. [2021-06-05 23:50:19,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 3.3301460361613353) internal successors, (19155), 5752 states have internal predecessors, (19155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 19155 transitions. [2021-06-05 23:50:19,022 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 19155 transitions. Word has length 30 [2021-06-05 23:50:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:19,022 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 19155 transitions. [2021-06-05 23:50:19,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 19155 transitions. [2021-06-05 23:50:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:19,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:19,028 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:19,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 23:50:19,230 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:19,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1980655713, now seen corresponding path program 112 times [2021-06-05 23:50:19,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:19,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893970621] [2021-06-05 23:50:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:19,437 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 23:50:19,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:19,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893970621] [2021-06-05 23:50:19,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893970621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:19,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359137538] [2021-06-05 23:50:19,437 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 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 23:50:19,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:50:19,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:19,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:19,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:19,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:50:19,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:19,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:19,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:19,713 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:50:19,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:19,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:19,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:19,718 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:50:19,737 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 23:50:19,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359137538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:19,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:19,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:50:19,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248509866] [2021-06-05 23:50:19,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:50:19,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:19,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:50:19,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:50:19,738 INFO L87 Difference]: Start difference. First operand 5753 states and 19155 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:20,920 INFO L93 Difference]: Finished difference Result 7778 states and 25622 transitions. [2021-06-05 23:50:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:50:20,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:20,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:20,934 INFO L225 Difference]: With dead ends: 7778 [2021-06-05 23:50:20,934 INFO L226 Difference]: Without dead ends: 7757 [2021-06-05 23:50:20,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 955.1ms TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:50:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7757 states. [2021-06-05 23:50:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7757 to 5777. [2021-06-05 23:50:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 5776 states have (on average 3.3337950138504153) internal successors, (19256), 5776 states have internal predecessors, (19256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 19256 transitions. [2021-06-05 23:50:21,020 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 19256 transitions. Word has length 30 [2021-06-05 23:50:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:21,020 INFO L482 AbstractCegarLoop]: Abstraction has 5777 states and 19256 transitions. [2021-06-05 23:50:21,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 19256 transitions. [2021-06-05 23:50:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:21,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:21,027 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:21,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:21,228 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:21,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:21,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1797878076, now seen corresponding path program 103 times [2021-06-05 23:50:21,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:21,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223940774] [2021-06-05 23:50:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:21,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:21,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223940774] [2021-06-05 23:50:21,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223940774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:21,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103039825] [2021-06-05 23:50:21,553 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 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 23:50:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:21,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:21,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:21,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:21,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:21,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 23:50:21,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:21,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:21,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:21,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:21,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:21,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:21,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:50:21,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:21,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:21,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:21,756 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:7 [2021-06-05 23:50:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:21,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103039825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:21,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:21,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 23:50:21,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616000291] [2021-06-05 23:50:21,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:50:21,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:50:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:50:21,781 INFO L87 Difference]: Start difference. First operand 5777 states and 19256 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:22,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:22,492 INFO L93 Difference]: Finished difference Result 6927 states and 22635 transitions. [2021-06-05 23:50:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:50:22,492 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:22,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:22,502 INFO L225 Difference]: With dead ends: 6927 [2021-06-05 23:50:22,502 INFO L226 Difference]: Without dead ends: 6901 [2021-06-05 23:50:22,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 769.9ms TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:50:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-06-05 23:50:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5755. [2021-06-05 23:50:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5755 states, 5754 states have (on average 3.3338547097671185) internal successors, (19183), 5754 states have internal predecessors, (19183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5755 states to 5755 states and 19183 transitions. [2021-06-05 23:50:22,579 INFO L78 Accepts]: Start accepts. Automaton has 5755 states and 19183 transitions. Word has length 30 [2021-06-05 23:50:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:22,579 INFO L482 AbstractCegarLoop]: Abstraction has 5755 states and 19183 transitions. [2021-06-05 23:50:22,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5755 states and 19183 transitions. [2021-06-05 23:50:22,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:22,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:22,586 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:22,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 23:50:22,787 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:22,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1044809516, now seen corresponding path program 104 times [2021-06-05 23:50:22,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:22,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351890641] [2021-06-05 23:50:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:23,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:23,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351890641] [2021-06-05 23:50:23,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351890641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:23,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415198602] [2021-06-05 23:50:23,136 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 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 23:50:23,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:50:23,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:23,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:50:23,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:23,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:23,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:23,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:23,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 23:50:23,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:23,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:23,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:23,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:50:23,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:23,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:23,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:23,354 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:7 [2021-06-05 23:50:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:23,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415198602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:23,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:23,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 23:50:23,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439734763] [2021-06-05 23:50:23,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:50:23,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:23,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:50:23,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:50:23,378 INFO L87 Difference]: Start difference. First operand 5755 states and 19183 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 23:50:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:24,131 INFO L93 Difference]: Finished difference Result 6863 states and 22480 transitions. [2021-06-05 23:50:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:50:24,132 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) Word has length 30 [2021-06-05 23:50:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:24,141 INFO L225 Difference]: With dead ends: 6863 [2021-06-05 23:50:24,141 INFO L226 Difference]: Without dead ends: 6837 [2021-06-05 23:50:24,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 920.8ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:50:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6837 states. [2021-06-05 23:50:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6837 to 5717. [2021-06-05 23:50:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5717 states, 5716 states have (on average 3.3383484954513647) internal successors, (19082), 5716 states have internal predecessors, (19082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5717 states to 5717 states and 19082 transitions. [2021-06-05 23:50:24,216 INFO L78 Accepts]: Start accepts. Automaton has 5717 states and 19082 transitions. Word has length 30 [2021-06-05 23:50:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:24,216 INFO L482 AbstractCegarLoop]: Abstraction has 5717 states and 19082 transitions. [2021-06-05 23:50:24,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 23:50:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 5717 states and 19082 transitions. [2021-06-05 23:50:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:24,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:24,223 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:24,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable605 [2021-06-05 23:50:24,423 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:24,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash 120856226, now seen corresponding path program 105 times [2021-06-05 23:50:24,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:24,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123905160] [2021-06-05 23:50:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:24,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:24,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123905160] [2021-06-05 23:50:24,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123905160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:24,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162919218] [2021-06-05 23:50:24,659 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 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 23:50:24,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:50:24,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:24,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:50:24,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:24,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:50:24,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:24,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:24,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:24,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:24,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:24,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:24,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:50:24,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:24,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:24,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:24,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:50:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:24,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162919218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:24,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:24,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:50:24,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28521599] [2021-06-05 23:50:24,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:50:24,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:24,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:50:24,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:50:24,958 INFO L87 Difference]: Start difference. First operand 5717 states and 19082 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:26,599 INFO L93 Difference]: Finished difference Result 7503 states and 24191 transitions. [2021-06-05 23:50:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:50:26,599 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:26,610 INFO L225 Difference]: With dead ends: 7503 [2021-06-05 23:50:26,610 INFO L226 Difference]: Without dead ends: 7488 [2021-06-05 23:50:26,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1235.1ms TimeCoverageRelationStatistics Valid=470, Invalid=3070, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:50:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7488 states. [2021-06-05 23:50:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7488 to 5804. [2021-06-05 23:50:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5804 states, 5803 states have (on average 3.33379286575909) internal successors, (19346), 5803 states have internal predecessors, (19346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5804 states to 5804 states and 19346 transitions. [2021-06-05 23:50:26,697 INFO L78 Accepts]: Start accepts. Automaton has 5804 states and 19346 transitions. Word has length 30 [2021-06-05 23:50:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:26,697 INFO L482 AbstractCegarLoop]: Abstraction has 5804 states and 19346 transitions. [2021-06-05 23:50:26,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states and 19346 transitions. [2021-06-05 23:50:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:26,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:26,704 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:26,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:26,904 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1070153916, now seen corresponding path program 106 times [2021-06-05 23:50:26,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:26,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344780858] [2021-06-05 23:50:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:27,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:27,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344780858] [2021-06-05 23:50:27,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344780858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:27,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451822673] [2021-06-05 23:50:27,133 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 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 23:50:27,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:50:27,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:27,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:27,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:27,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:27,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:27,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:27,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 23:50:27,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:27,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:27,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:27,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:27,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:27,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:50:27,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:27,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:27,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:27,379 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:50:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:27,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451822673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:27,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:27,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 23:50:27,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456176660] [2021-06-05 23:50:27,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:50:27,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:50:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:50:27,405 INFO L87 Difference]: Start difference. First operand 5804 states and 19346 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:29,092 INFO L93 Difference]: Finished difference Result 8872 states and 28578 transitions. [2021-06-05 23:50:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:50:29,092 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:29,105 INFO L225 Difference]: With dead ends: 8872 [2021-06-05 23:50:29,106 INFO L226 Difference]: Without dead ends: 8821 [2021-06-05 23:50:29,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1490.5ms TimeCoverageRelationStatistics Valid=721, Invalid=3185, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:50:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2021-06-05 23:50:29,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 5953. [2021-06-05 23:50:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5952 states have (on average 3.326108870967742) internal successors, (19797), 5952 states have internal predecessors, (19797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 19797 transitions. [2021-06-05 23:50:29,207 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 19797 transitions. Word has length 30 [2021-06-05 23:50:29,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:29,207 INFO L482 AbstractCegarLoop]: Abstraction has 5953 states and 19797 transitions. [2021-06-05 23:50:29,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 19797 transitions. [2021-06-05 23:50:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:29,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:29,214 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:29,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:29,415 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:29,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:29,415 INFO L82 PathProgramCache]: Analyzing trace with hash 158618808, now seen corresponding path program 107 times [2021-06-05 23:50:29,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:29,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211140145] [2021-06-05 23:50:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:29,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211140145] [2021-06-05 23:50:29,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211140145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027068141] [2021-06-05 23:50:29,691 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 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 23:50:29,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:50:29,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:29,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:50:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:29,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:29,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:29,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:29,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:29,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 23:50:29,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:29,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:29,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:29,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:29,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:29,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:29,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:50:29,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:29,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:29,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:29,904 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:50:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:29,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027068141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:29,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:29,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 23:50:29,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774770360] [2021-06-05 23:50:29,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:50:29,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:29,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:50:29,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:50:29,928 INFO L87 Difference]: Start difference. First operand 5953 states and 19797 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:32,295 INFO L93 Difference]: Finished difference Result 8064 states and 26418 transitions. [2021-06-05 23:50:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:50:32,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:32,307 INFO L225 Difference]: With dead ends: 8064 [2021-06-05 23:50:32,307 INFO L226 Difference]: Without dead ends: 8013 [2021-06-05 23:50:32,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1911.0ms TimeCoverageRelationStatistics Valid=925, Invalid=4187, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:50:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8013 states. [2021-06-05 23:50:32,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8013 to 6048. [2021-06-05 23:50:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6048 states, 6047 states have (on average 3.3256160079378203) internal successors, (20110), 6047 states have internal predecessors, (20110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6048 states to 6048 states and 20110 transitions. [2021-06-05 23:50:32,392 INFO L78 Accepts]: Start accepts. Automaton has 6048 states and 20110 transitions. Word has length 30 [2021-06-05 23:50:32,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:32,392 INFO L482 AbstractCegarLoop]: Abstraction has 6048 states and 20110 transitions. [2021-06-05 23:50:32,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6048 states and 20110 transitions. [2021-06-05 23:50:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:32,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:32,399 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:32,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:32,600 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:32,600 INFO L82 PathProgramCache]: Analyzing trace with hash 818965056, now seen corresponding path program 108 times [2021-06-05 23:50:32,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:32,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80359060] [2021-06-05 23:50:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:32,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:32,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80359060] [2021-06-05 23:50:32,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80359060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:32,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122526458] [2021-06-05 23:50:32,834 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 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 23:50:32,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:50:32,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:32,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:50:32,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:33,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:33,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:33,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:33,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:33,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 23:50:33,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:33,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:33,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:33,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:33,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:33,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:33,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:50:33,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:33,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:33,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:33,054 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:50:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:33,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122526458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:33,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:33,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 23:50:33,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256009460] [2021-06-05 23:50:33,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:50:33,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:50:33,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:50:33,077 INFO L87 Difference]: Start difference. First operand 6048 states and 20110 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 23:50:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:34,656 INFO L93 Difference]: Finished difference Result 7899 states and 25948 transitions. [2021-06-05 23:50:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:50:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) Word has length 30 [2021-06-05 23:50:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:34,667 INFO L225 Difference]: With dead ends: 7899 [2021-06-05 23:50:34,667 INFO L226 Difference]: Without dead ends: 7857 [2021-06-05 23:50:34,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1398.3ms TimeCoverageRelationStatistics Valid=580, Invalid=3080, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:50:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2021-06-05 23:50:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6058. [2021-06-05 23:50:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6058 states, 6057 states have (on average 3.324252930493644) internal successors, (20135), 6057 states have internal predecessors, (20135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6058 states to 6058 states and 20135 transitions. [2021-06-05 23:50:34,750 INFO L78 Accepts]: Start accepts. Automaton has 6058 states and 20135 transitions. Word has length 30 [2021-06-05 23:50:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:34,751 INFO L482 AbstractCegarLoop]: Abstraction has 6058 states and 20135 transitions. [2021-06-05 23:50:34,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 23:50:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6058 states and 20135 transitions. [2021-06-05 23:50:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:34,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:34,758 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:34,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:34,959 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:34,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1768655084, now seen corresponding path program 109 times [2021-06-05 23:50:34,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:34,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158995758] [2021-06-05 23:50:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:35,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:35,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158995758] [2021-06-05 23:50:35,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158995758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:35,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643259425] [2021-06-05 23:50:35,207 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 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 23:50:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:35,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:35,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:35,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:35,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:35,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:35,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:35,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 23:50:35,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:35,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:35,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:35,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:35,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:50:35,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:35,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:35,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:35,430 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:50:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:35,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643259425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:35,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:35,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 23:50:35,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255766893] [2021-06-05 23:50:35,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:50:35,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:50:35,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:50:35,455 INFO L87 Difference]: Start difference. First operand 6058 states and 20135 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 23:50:36,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:36,335 INFO L93 Difference]: Finished difference Result 7178 states and 23545 transitions. [2021-06-05 23:50:36,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:50:36,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) Word has length 30 [2021-06-05 23:50:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:36,346 INFO L225 Difference]: With dead ends: 7178 [2021-06-05 23:50:36,346 INFO L226 Difference]: Without dead ends: 7140 [2021-06-05 23:50:36,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 771.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:50:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-06-05 23:50:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 6066. [2021-06-05 23:50:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6066 states, 6065 states have (on average 3.323825226710635) internal successors, (20159), 6065 states have internal predecessors, (20159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6066 states to 6066 states and 20159 transitions. [2021-06-05 23:50:36,431 INFO L78 Accepts]: Start accepts. Automaton has 6066 states and 20159 transitions. Word has length 30 [2021-06-05 23:50:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:36,432 INFO L482 AbstractCegarLoop]: Abstraction has 6066 states and 20159 transitions. [2021-06-05 23:50:36,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 23:50:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 6066 states and 20159 transitions. [2021-06-05 23:50:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:36,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:36,476 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:36,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-06-05 23:50:36,677 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:36,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1739330246, now seen corresponding path program 110 times [2021-06-05 23:50:36,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:36,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93232005] [2021-06-05 23:50:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:36,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:36,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93232005] [2021-06-05 23:50:36,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93232005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:36,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915394155] [2021-06-05 23:50:36,927 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 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 23:50:36,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:50:36,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:50:36,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:37,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:37,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:37,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:37,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:37,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 23:50:37,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:37,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:37,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:37,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:37,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:37,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:37,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:50:37,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:37,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:37,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:37,159 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:16 [2021-06-05 23:50:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:37,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915394155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:37,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:37,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 23:50:37,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577759158] [2021-06-05 23:50:37,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:50:37,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:37,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:50:37,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:50:37,221 INFO L87 Difference]: Start difference. First operand 6066 states and 20159 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:38,487 INFO L93 Difference]: Finished difference Result 7415 states and 23815 transitions. [2021-06-05 23:50:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:50:38,488 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:38,498 INFO L225 Difference]: With dead ends: 7415 [2021-06-05 23:50:38,498 INFO L226 Difference]: Without dead ends: 7355 [2021-06-05 23:50:38,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1228.2ms TimeCoverageRelationStatistics Valid=493, Invalid=2699, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:50:38,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7355 states. [2021-06-05 23:50:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7355 to 6088. [2021-06-05 23:50:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6088 states, 6087 states have (on average 3.3208477082306556) internal successors, (20214), 6087 states have internal predecessors, (20214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6088 states to 6088 states and 20214 transitions. [2021-06-05 23:50:38,589 INFO L78 Accepts]: Start accepts. Automaton has 6088 states and 20214 transitions. Word has length 30 [2021-06-05 23:50:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:38,589 INFO L482 AbstractCegarLoop]: Abstraction has 6088 states and 20214 transitions. [2021-06-05 23:50:38,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6088 states and 20214 transitions. [2021-06-05 23:50:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:38,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:38,597 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:38,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:38,797 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:38,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1701567664, now seen corresponding path program 111 times [2021-06-05 23:50:38,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:38,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061291607] [2021-06-05 23:50:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:39,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:39,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061291607] [2021-06-05 23:50:39,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061291607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:39,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137408316] [2021-06-05 23:50:39,102 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 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 23:50:39,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:50:39,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:39,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:39,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:39,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:39,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:39,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 63 [2021-06-05 23:50:39,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:50:39,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:39,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:39,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:39,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-06-05 23:50:39,390 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:39,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:39,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:39,399 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:54, output treesize:28 [2021-06-05 23:50:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:39,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137408316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:39,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:39,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:50:39,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786466129] [2021-06-05 23:50:39,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:50:39,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:39,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:50:39,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:50:39,472 INFO L87 Difference]: Start difference. First operand 6088 states and 20214 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:41,935 INFO L93 Difference]: Finished difference Result 8069 states and 26244 transitions. [2021-06-05 23:50:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:50:41,935 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:41,947 INFO L225 Difference]: With dead ends: 8069 [2021-06-05 23:50:41,947 INFO L226 Difference]: Without dead ends: 7986 [2021-06-05 23:50:41,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2011.2ms TimeCoverageRelationStatistics Valid=803, Invalid=4599, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:50:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7986 states. [2021-06-05 23:50:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7986 to 6130. [2021-06-05 23:50:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6130 states, 6129 states have (on average 3.3163648229727527) internal successors, (20326), 6129 states have internal predecessors, (20326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6130 states to 6130 states and 20326 transitions. [2021-06-05 23:50:42,071 INFO L78 Accepts]: Start accepts. Automaton has 6130 states and 20326 transitions. Word has length 30 [2021-06-05 23:50:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:42,071 INFO L482 AbstractCegarLoop]: Abstraction has 6130 states and 20326 transitions. [2021-06-05 23:50:42,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:42,072 INFO L276 IsEmpty]: Start isEmpty. Operand 6130 states and 20326 transitions. [2021-06-05 23:50:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:42,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:42,078 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:42,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-05 23:50:42,279 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1041221416, now seen corresponding path program 112 times [2021-06-05 23:50:42,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:42,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065651157] [2021-06-05 23:50:42,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:42,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065651157] [2021-06-05 23:50:42,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065651157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305455535] [2021-06-05 23:50:42,533 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 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 23:50:42,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:50:42,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:42,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:42,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:42,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:42,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 23:50:42,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:42,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:42,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:42,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:42,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:50:42,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:42,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:42,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:42,747 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:50:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:42,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305455535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:42,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:42,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 23:50:42,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571979385] [2021-06-05 23:50:42,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:50:42,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:42,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:50:42,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:50:42,770 INFO L87 Difference]: Start difference. First operand 6130 states and 20326 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 23:50:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:43,875 INFO L93 Difference]: Finished difference Result 7466 states and 24465 transitions. [2021-06-05 23:50:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:50:43,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) Word has length 30 [2021-06-05 23:50:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:43,885 INFO L225 Difference]: With dead ends: 7466 [2021-06-05 23:50:43,886 INFO L226 Difference]: Without dead ends: 7428 [2021-06-05 23:50:43,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 994.6ms TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:50:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7428 states. [2021-06-05 23:50:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7428 to 6130. [2021-06-05 23:50:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6130 states, 6129 states have (on average 3.3163648229727527) internal successors, (20326), 6129 states have internal predecessors, (20326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6130 states to 6130 states and 20326 transitions. [2021-06-05 23:50:43,975 INFO L78 Accepts]: Start accepts. Automaton has 6130 states and 20326 transitions. Word has length 30 [2021-06-05 23:50:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:43,975 INFO L482 AbstractCegarLoop]: Abstraction has 6130 states and 20326 transitions. [2021-06-05 23:50:43,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 23:50:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 6130 states and 20326 transitions. [2021-06-05 23:50:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:43,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:43,984 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:44,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:44,185 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1097067494, now seen corresponding path program 113 times [2021-06-05 23:50:44,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:44,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039380644] [2021-06-05 23:50:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:44,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:44,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039380644] [2021-06-05 23:50:44,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039380644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:44,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871357866] [2021-06-05 23:50:44,541 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 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 23:50:44,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:50:44,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:44,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:50:44,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:44,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:44,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:44,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:44,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 23:50:44,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:44,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:44,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:44,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:44,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:44,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:50:44,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:44,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:44,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:44,777 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:50:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:44,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871357866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:44,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:44,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 23:50:44,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524795426] [2021-06-05 23:50:44,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:50:44,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:44,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:50:44,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:50:44,798 INFO L87 Difference]: Start difference. First operand 6130 states and 20326 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:46,016 INFO L93 Difference]: Finished difference Result 7353 states and 23914 transitions. [2021-06-05 23:50:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:50:46,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:46,028 INFO L225 Difference]: With dead ends: 7353 [2021-06-05 23:50:46,028 INFO L226 Difference]: Without dead ends: 7327 [2021-06-05 23:50:46,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1308.1ms TimeCoverageRelationStatistics Valid=449, Invalid=2001, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:50:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2021-06-05 23:50:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 6142. [2021-06-05 23:50:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 3.314769581501384) internal successors, (20356), 6141 states have internal predecessors, (20356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 20356 transitions. [2021-06-05 23:50:46,122 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 20356 transitions. Word has length 30 [2021-06-05 23:50:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:46,122 INFO L482 AbstractCegarLoop]: Abstraction has 6142 states and 20356 transitions. [2021-06-05 23:50:46,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 20356 transitions. [2021-06-05 23:50:46,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:46,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:46,130 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:46,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:46,330 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:46,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:46,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1134830076, now seen corresponding path program 114 times [2021-06-05 23:50:46,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:46,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866323723] [2021-06-05 23:50:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:46,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:46,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866323723] [2021-06-05 23:50:46,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866323723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:46,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144316809] [2021-06-05 23:50:46,644 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 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 23:50:46,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:50:46,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:46,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:50:46,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:46,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:46,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:46,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:46,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 63 [2021-06-05 23:50:46,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:50:46,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:46,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:46,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:46,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:46,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-06-05 23:50:46,898 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:46,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:46,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:46,908 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:54, output treesize:28 [2021-06-05 23:50:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:46,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144316809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:46,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:46,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:50:46,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857636673] [2021-06-05 23:50:46,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:50:46,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:46,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:50:46,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:50:46,986 INFO L87 Difference]: Start difference. First operand 6142 states and 20356 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:49,161 INFO L93 Difference]: Finished difference Result 7791 states and 25452 transitions. [2021-06-05 23:50:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:50:49,161 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:49,172 INFO L225 Difference]: With dead ends: 7791 [2021-06-05 23:50:49,172 INFO L226 Difference]: Without dead ends: 7761 [2021-06-05 23:50:49,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1854.1ms TimeCoverageRelationStatistics Valid=577, Invalid=3583, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:50:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2021-06-05 23:50:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 6176. [2021-06-05 23:50:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6176 states, 6175 states have (on average 3.3102834008097166) internal successors, (20441), 6175 states have internal predecessors, (20441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6176 states to 6176 states and 20441 transitions. [2021-06-05 23:50:49,262 INFO L78 Accepts]: Start accepts. Automaton has 6176 states and 20441 transitions. Word has length 30 [2021-06-05 23:50:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:49,262 INFO L482 AbstractCegarLoop]: Abstraction has 6176 states and 20441 transitions. [2021-06-05 23:50:49,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 6176 states and 20441 transitions. [2021-06-05 23:50:49,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:49,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:49,269 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:49,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-06-05 23:50:49,470 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:49,470 INFO L82 PathProgramCache]: Analyzing trace with hash 897978794, now seen corresponding path program 115 times [2021-06-05 23:50:49,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:49,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076192901] [2021-06-05 23:50:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:49,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:49,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076192901] [2021-06-05 23:50:49,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076192901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:49,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483360994] [2021-06-05 23:50:49,872 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 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 23:50:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:49,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:49,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:50,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:50,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:50,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:50,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:50,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 23:50:50,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:50,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:50,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:50,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:50,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:50,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:50,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2021-06-05 23:50:50,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:50,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:50,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:50,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:50:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:50,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483360994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:50,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:50,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 23:50:50,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022705423] [2021-06-05 23:50:50,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:50:50,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:50,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:50:50,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:50:50,130 INFO L87 Difference]: Start difference. First operand 6176 states and 20441 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:50,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:50,870 INFO L93 Difference]: Finished difference Result 7217 states and 23591 transitions. [2021-06-05 23:50:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:50:50,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:50,881 INFO L225 Difference]: With dead ends: 7217 [2021-06-05 23:50:50,881 INFO L226 Difference]: Without dead ends: 7191 [2021-06-05 23:50:50,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 920.5ms TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:50:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7191 states. [2021-06-05 23:50:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7191 to 6176. [2021-06-05 23:50:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6176 states, 6175 states have (on average 3.3102834008097166) internal successors, (20441), 6175 states have internal predecessors, (20441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6176 states to 6176 states and 20441 transitions. [2021-06-05 23:50:50,967 INFO L78 Accepts]: Start accepts. Automaton has 6176 states and 20441 transitions. Word has length 30 [2021-06-05 23:50:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:50,967 INFO L482 AbstractCegarLoop]: Abstraction has 6176 states and 20441 transitions. [2021-06-05 23:50:50,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6176 states and 20441 transitions. [2021-06-05 23:50:50,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:50,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:50,975 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:51,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:51,175 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:51,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1135121463, now seen corresponding path program 113 times [2021-06-05 23:50:51,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:51,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668586285] [2021-06-05 23:50:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:51,569 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 23:50:51,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:51,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668586285] [2021-06-05 23:50:51,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668586285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:51,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713489424] [2021-06-05 23:50:51,570 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 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 23:50:51,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:50:51,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:51,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:50:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:51,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:51,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:51,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:50:51,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:51,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:51,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:51,846 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:50:51,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:51,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:51,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:51,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:50:51,869 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 23:50:51,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713489424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:51,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:51,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:50:51,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047075560] [2021-06-05 23:50:51,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:50:51,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:51,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:50:51,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:50:51,870 INFO L87 Difference]: Start difference. First operand 6176 states and 20441 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:53,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:53,363 INFO L93 Difference]: Finished difference Result 7925 states and 25751 transitions. [2021-06-05 23:50:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:50:53,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:53,376 INFO L225 Difference]: With dead ends: 7925 [2021-06-05 23:50:53,376 INFO L226 Difference]: Without dead ends: 7910 [2021-06-05 23:50:53,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1269.3ms TimeCoverageRelationStatistics Valid=332, Invalid=1390, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:50:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7910 states. [2021-06-05 23:50:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7910 to 6194. [2021-06-05 23:50:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6194 states, 6193 states have (on average 3.31115775875989) internal successors, (20506), 6193 states have internal predecessors, (20506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 20506 transitions. [2021-06-05 23:50:53,465 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 20506 transitions. Word has length 30 [2021-06-05 23:50:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:53,465 INFO L482 AbstractCegarLoop]: Abstraction has 6194 states and 20506 transitions. [2021-06-05 23:50:53,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 20506 transitions. [2021-06-05 23:50:53,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:53,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:53,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:53,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-05 23:50:53,673 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:53,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1466251909, now seen corresponding path program 114 times [2021-06-05 23:50:53,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:53,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785073228] [2021-06-05 23:50:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:53,997 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 23:50:53,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:53,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785073228] [2021-06-05 23:50:53,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785073228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:53,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378939715] [2021-06-05 23:50:53,997 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 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 23:50:54,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:50:54,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:50:54,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:54,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:54,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:54,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:50:54,178 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:54,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:54,186 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:50:54,188 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:54,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:54,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:54,194 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:50:54,253 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 23:50:54,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378939715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:54,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:54,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:50:54,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521878605] [2021-06-05 23:50:54,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:50:54,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:54,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:50:54,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:50:54,254 INFO L87 Difference]: Start difference. First operand 6194 states and 20506 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:56,746 INFO L93 Difference]: Finished difference Result 8377 states and 27223 transitions. [2021-06-05 23:50:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:50:56,747 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:50:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:56,758 INFO L225 Difference]: With dead ends: 8377 [2021-06-05 23:50:56,759 INFO L226 Difference]: Without dead ends: 8352 [2021-06-05 23:50:56,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1867.7ms TimeCoverageRelationStatistics Valid=521, Invalid=3019, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:50:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-06-05 23:50:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6186. [2021-06-05 23:50:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6186 states, 6185 states have (on average 3.3115602263540826) internal successors, (20482), 6185 states have internal predecessors, (20482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 20482 transitions. [2021-06-05 23:50:56,860 INFO L78 Accepts]: Start accepts. Automaton has 6186 states and 20482 transitions. Word has length 30 [2021-06-05 23:50:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:56,861 INFO L482 AbstractCegarLoop]: Abstraction has 6186 states and 20482 transitions. [2021-06-05 23:50:56,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6186 states and 20482 transitions. [2021-06-05 23:50:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:50:56,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:56,868 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:57,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-06-05 23:50:57,069 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1192614468, now seen corresponding path program 116 times [2021-06-05 23:50:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84679097] [2021-06-05 23:50:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:57,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84679097] [2021-06-05 23:50:57,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84679097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43151614] [2021-06-05 23:50:57,262 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 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 23:50:57,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:50:57,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:57,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:57,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:57,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:57,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:50:57,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:57,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:57,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:57,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:57,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:57,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:57,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:50:57,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:57,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:57,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:57,508 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:50:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:57,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43151614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:57,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:57,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 23:50:57,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240964150] [2021-06-05 23:50:57,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:50:57,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:57,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:50:57,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:50:57,525 INFO L87 Difference]: Start difference. First operand 6186 states and 20482 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:00,360 INFO L93 Difference]: Finished difference Result 10531 states and 33927 transitions. [2021-06-05 23:51:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:51:00,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:00,376 INFO L225 Difference]: With dead ends: 10531 [2021-06-05 23:51:00,376 INFO L226 Difference]: Without dead ends: 10488 [2021-06-05 23:51:00,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1867.1ms TimeCoverageRelationStatistics Valid=948, Invalid=4602, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:51:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10488 states. [2021-06-05 23:51:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10488 to 6435. [2021-06-05 23:51:00,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6435 states, 6434 states have (on average 3.3144233758159776) internal successors, (21325), 6434 states have internal predecessors, (21325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 21325 transitions. [2021-06-05 23:51:00,493 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 21325 transitions. Word has length 30 [2021-06-05 23:51:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:00,493 INFO L482 AbstractCegarLoop]: Abstraction has 6435 states and 21325 transitions. [2021-06-05 23:51:00,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 21325 transitions. [2021-06-05 23:51:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:00,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:00,501 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:00,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 23:51:00,702 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:00,702 INFO L82 PathProgramCache]: Analyzing trace with hash -718338628, now seen corresponding path program 117 times [2021-06-05 23:51:00,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:00,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764206392] [2021-06-05 23:51:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:00,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:00,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764206392] [2021-06-05 23:51:00,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764206392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:00,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379219749] [2021-06-05 23:51:00,893 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 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 23:51:00,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:51:00,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:00,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:51:00,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:01,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:01,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:01,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 23:51:01,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:01,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:01,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:01,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:01,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:51:01,123 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:01,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:01,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:01,132 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:19 [2021-06-05 23:51:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:01,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379219749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:01,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:01,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:51:01,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199965721] [2021-06-05 23:51:01,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:51:01,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:01,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:51:01,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:51:01,178 INFO L87 Difference]: Start difference. First operand 6435 states and 21325 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:03,596 INFO L93 Difference]: Finished difference Result 10972 states and 35189 transitions. [2021-06-05 23:51:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:51:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:03,614 INFO L225 Difference]: With dead ends: 10972 [2021-06-05 23:51:03,614 INFO L226 Difference]: Without dead ends: 10919 [2021-06-05 23:51:03,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1680.4ms TimeCoverageRelationStatistics Valid=771, Invalid=3921, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:51:03,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10919 states. [2021-06-05 23:51:03,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10919 to 6770. [2021-06-05 23:51:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6770 states, 6769 states have (on average 3.322499630669227) internal successors, (22490), 6769 states have internal predecessors, (22490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 22490 transitions. [2021-06-05 23:51:03,737 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 22490 transitions. Word has length 30 [2021-06-05 23:51:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:03,737 INFO L482 AbstractCegarLoop]: Abstraction has 6770 states and 22490 transitions. [2021-06-05 23:51:03,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 22490 transitions. [2021-06-05 23:51:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:03,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:03,745 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:03,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 23:51:03,945 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:03,946 INFO L82 PathProgramCache]: Analyzing trace with hash 997281548, now seen corresponding path program 118 times [2021-06-05 23:51:03,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:03,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905965164] [2021-06-05 23:51:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:04,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:04,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905965164] [2021-06-05 23:51:04,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905965164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:04,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623314676] [2021-06-05 23:51:04,162 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 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 23:51:04,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:51:04,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:51:04,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:04,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:04,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:04,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:04,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:04,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:51:04,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:04,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:04,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:04,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:04,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:04,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:04,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:51:04,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:04,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:04,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:04,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:51:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:04,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623314676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:04,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:04,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:51:04,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512504986] [2021-06-05 23:51:04,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:51:04,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:04,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:51:04,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:51:04,438 INFO L87 Difference]: Start difference. First operand 6770 states and 22490 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:06,271 INFO L93 Difference]: Finished difference Result 8521 states and 27724 transitions. [2021-06-05 23:51:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:51:06,271 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:06,283 INFO L225 Difference]: With dead ends: 8521 [2021-06-05 23:51:06,283 INFO L226 Difference]: Without dead ends: 8500 [2021-06-05 23:51:06,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1251.1ms TimeCoverageRelationStatistics Valid=450, Invalid=2520, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:51:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8500 states. [2021-06-05 23:51:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8500 to 6757. [2021-06-05 23:51:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6756 states have (on average 3.321343990526939) internal successors, (22439), 6756 states have internal predecessors, (22439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 22439 transitions. [2021-06-05 23:51:06,386 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 22439 transitions. Word has length 30 [2021-06-05 23:51:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:06,386 INFO L482 AbstractCegarLoop]: Abstraction has 6757 states and 22439 transitions. [2021-06-05 23:51:06,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 22439 transitions. [2021-06-05 23:51:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:06,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:06,395 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:06,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable637 [2021-06-05 23:51:06,595 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:06,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1143254476, now seen corresponding path program 119 times [2021-06-05 23:51:06,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:06,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826998926] [2021-06-05 23:51:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:06,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:06,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826998926] [2021-06-05 23:51:06,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826998926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:06,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150850510] [2021-06-05 23:51:06,846 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 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 23:51:06,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:51:06,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:06,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:51:06,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:07,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:07,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:07,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:07,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:07,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-06-05 23:51:07,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:07,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:07,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:07,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:07,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-06-05 23:51:07,067 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:07,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:07,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:07,076 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:28 [2021-06-05 23:51:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:07,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150850510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:07,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:07,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:51:07,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538852821] [2021-06-05 23:51:07,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:51:07,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:51:07,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:51:07,152 INFO L87 Difference]: Start difference. First operand 6757 states and 22439 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:09,204 INFO L93 Difference]: Finished difference Result 8764 states and 28498 transitions. [2021-06-05 23:51:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:51:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:09,217 INFO L225 Difference]: With dead ends: 8764 [2021-06-05 23:51:09,217 INFO L226 Difference]: Without dead ends: 8684 [2021-06-05 23:51:09,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1495.9ms TimeCoverageRelationStatistics Valid=588, Invalid=3194, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:51:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-06-05 23:51:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 6703. [2021-06-05 23:51:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 6702 states have (on average 3.3263205013428827) internal successors, (22293), 6702 states have internal predecessors, (22293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 22293 transitions. [2021-06-05 23:51:09,319 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 22293 transitions. Word has length 30 [2021-06-05 23:51:09,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:09,319 INFO L482 AbstractCegarLoop]: Abstraction has 6703 states and 22293 transitions. [2021-06-05 23:51:09,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 22293 transitions. [2021-06-05 23:51:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:09,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:09,328 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:09,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:09,528 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1720071681, now seen corresponding path program 115 times [2021-06-05 23:51:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:09,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888607614] [2021-06-05 23:51:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:09,813 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 23:51:09,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:09,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888607614] [2021-06-05 23:51:09,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888607614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:09,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625391862] [2021-06-05 23:51:09,813 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 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 23:51:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:09,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:51:09,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:10,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:10,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:10,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:51:10,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:10,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:10,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:10,103 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:51:10,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:10,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:10,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:10,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-06-05 23:51:10,128 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 23:51:10,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625391862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:10,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:10,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:51:10,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035787915] [2021-06-05 23:51:10,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:51:10,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:10,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:51:10,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:51:10,129 INFO L87 Difference]: Start difference. First operand 6703 states and 22293 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:11,826 INFO L93 Difference]: Finished difference Result 8250 states and 27166 transitions. [2021-06-05 23:51:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:51:11,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:11,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:11,838 INFO L225 Difference]: With dead ends: 8250 [2021-06-05 23:51:11,838 INFO L226 Difference]: Without dead ends: 8235 [2021-06-05 23:51:11,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1304.5ms TimeCoverageRelationStatistics Valid=396, Invalid=1860, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:51:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8235 states. [2021-06-05 23:51:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8235 to 6735. [2021-06-05 23:51:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6735 states, 6734 states have (on average 3.326106326106326) internal successors, (22398), 6734 states have internal predecessors, (22398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6735 states to 6735 states and 22398 transitions. [2021-06-05 23:51:11,930 INFO L78 Accepts]: Start accepts. Automaton has 6735 states and 22398 transitions. Word has length 30 [2021-06-05 23:51:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:11,930 INFO L482 AbstractCegarLoop]: Abstraction has 6735 states and 22398 transitions. [2021-06-05 23:51:11,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 6735 states and 22398 transitions. [2021-06-05 23:51:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:11,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:11,939 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:12,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-06-05 23:51:12,141 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:12,141 INFO L82 PathProgramCache]: Analyzing trace with hash -769347479, now seen corresponding path program 116 times [2021-06-05 23:51:12,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:12,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400777801] [2021-06-05 23:51:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:12,463 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 23:51:12,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:12,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400777801] [2021-06-05 23:51:12,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400777801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:12,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479145209] [2021-06-05 23:51:12,464 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 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 23:51:12,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:51:12,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:12,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:51:12,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:12,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:12,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:12,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:51:12,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:12,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:12,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:12,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:51:12,729 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:12,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:12,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:12,747 INFO L354 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2021-06-05 23:51:12,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2021-06-05 23:51:12,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:12,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:12,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:12,777 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:96 [2021-06-05 23:51:12,916 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 23:51:12,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479145209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:12,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:12,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:51:12,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186185197] [2021-06-05 23:51:12,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:51:12,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:12,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:51:12,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:51:12,917 INFO L87 Difference]: Start difference. First operand 6735 states and 22398 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:18,014 INFO L93 Difference]: Finished difference Result 9954 states and 32266 transitions. [2021-06-05 23:51:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:51:18,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:18,029 INFO L225 Difference]: With dead ends: 9954 [2021-06-05 23:51:18,030 INFO L226 Difference]: Without dead ends: 9916 [2021-06-05 23:51:18,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 3712.1ms TimeCoverageRelationStatistics Valid=806, Invalid=5514, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 23:51:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9916 states. [2021-06-05 23:51:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9916 to 6790. [2021-06-05 23:51:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6790 states, 6789 states have (on average 3.3284725290911767) internal successors, (22597), 6789 states have internal predecessors, (22597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6790 states to 6790 states and 22597 transitions. [2021-06-05 23:51:18,147 INFO L78 Accepts]: Start accepts. Automaton has 6790 states and 22597 transitions. Word has length 30 [2021-06-05 23:51:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:18,147 INFO L482 AbstractCegarLoop]: Abstraction has 6790 states and 22597 transitions. [2021-06-05 23:51:18,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 6790 states and 22597 transitions. [2021-06-05 23:51:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:18,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:18,156 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:18,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:18,356 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:18,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1599715001, now seen corresponding path program 117 times [2021-06-05 23:51:18,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:18,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231086963] [2021-06-05 23:51:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:18,685 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 23:51:18,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:18,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231086963] [2021-06-05 23:51:18,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231086963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:18,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653455471] [2021-06-05 23:51:18,685 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 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 23:51:18,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:51:18,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:51:18,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:18,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:18,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:51:18,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:18,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:18,938 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:51:18,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:51:18,940 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:18,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:51:18,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:18,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:18,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:18,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:18,966 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:47, output treesize:108 [2021-06-05 23:51:19,115 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 23:51:19,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653455471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:19,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:19,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 23:51:19,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032496396] [2021-06-05 23:51:19,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:51:19,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:19,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:51:19,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:51:19,116 INFO L87 Difference]: Start difference. First operand 6790 states and 22597 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:22,010 INFO L93 Difference]: Finished difference Result 9223 states and 30073 transitions. [2021-06-05 23:51:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:51:22,010 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:22,024 INFO L225 Difference]: With dead ends: 9223 [2021-06-05 23:51:22,024 INFO L226 Difference]: Without dead ends: 9173 [2021-06-05 23:51:22,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 2088.5ms TimeCoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:51:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9173 states. [2021-06-05 23:51:22,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9173 to 6778. [2021-06-05 23:51:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 6777 states have (on average 3.32713590084108) internal successors, (22548), 6777 states have internal predecessors, (22548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 22548 transitions. [2021-06-05 23:51:22,128 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 22548 transitions. Word has length 30 [2021-06-05 23:51:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:22,128 INFO L482 AbstractCegarLoop]: Abstraction has 6778 states and 22548 transitions. [2021-06-05 23:51:22,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 22548 transitions. [2021-06-05 23:51:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:22,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:22,137 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:22,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 23:51:22,345 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash 69803245, now seen corresponding path program 118 times [2021-06-05 23:51:22,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:22,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915367437] [2021-06-05 23:51:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:22,644 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 23:51:22,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:22,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915367437] [2021-06-05 23:51:22,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915367437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:22,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604112950] [2021-06-05 23:51:22,645 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 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 23:51:22,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:51:22,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:51:22,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:22,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:22,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:22,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:51:22,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:22,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:22,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:22,870 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:51:22,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:51:22,871 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:22,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:51:22,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:22,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:22,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:22,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:22,894 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:44 [2021-06-05 23:51:23,002 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 23:51:23,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604112950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:23,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:23,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:51:23,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454971544] [2021-06-05 23:51:23,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:51:23,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:23,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:51:23,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:51:23,003 INFO L87 Difference]: Start difference. First operand 6778 states and 22548 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 23:51:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:24,648 INFO L93 Difference]: Finished difference Result 9109 states and 29916 transitions. [2021-06-05 23:51:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:51:24,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) Word has length 30 [2021-06-05 23:51:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:24,662 INFO L225 Difference]: With dead ends: 9109 [2021-06-05 23:51:24,662 INFO L226 Difference]: Without dead ends: 9084 [2021-06-05 23:51:24,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1426.3ms TimeCoverageRelationStatistics Valid=481, Invalid=1969, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:51:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9084 states. [2021-06-05 23:51:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9084 to 6756. [2021-06-05 23:51:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6756 states, 6755 states have (on average 3.3287934863064397) internal successors, (22486), 6755 states have internal predecessors, (22486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6756 states to 6756 states and 22486 transitions. [2021-06-05 23:51:24,761 INFO L78 Accepts]: Start accepts. Automaton has 6756 states and 22486 transitions. Word has length 30 [2021-06-05 23:51:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:24,761 INFO L482 AbstractCegarLoop]: Abstraction has 6756 states and 22486 transitions. [2021-06-05 23:51:24,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 23:51:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 6756 states and 22486 transitions. [2021-06-05 23:51:24,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:24,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:24,769 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:24,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:24,970 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:24,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1759143288, now seen corresponding path program 120 times [2021-06-05 23:51:24,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:24,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194006019] [2021-06-05 23:51:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:25,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:25,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194006019] [2021-06-05 23:51:25,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194006019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:25,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007156873] [2021-06-05 23:51:25,215 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 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 23:51:25,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:51:25,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:25,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:51:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:25,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:25,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:25,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:25,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:25,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:51:25,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:25,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:25,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:25,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:25,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:25,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:25,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:51:25,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:25,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:25,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:25,471 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:51:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:25,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007156873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:25,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:25,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 23:51:25,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208929025] [2021-06-05 23:51:25,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:51:25,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:25,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:51:25,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:51:25,488 INFO L87 Difference]: Start difference. First operand 6756 states and 22486 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:28,457 INFO L93 Difference]: Finished difference Result 8864 states and 28972 transitions. [2021-06-05 23:51:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:51:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:28,471 INFO L225 Difference]: With dead ends: 8864 [2021-06-05 23:51:28,471 INFO L226 Difference]: Without dead ends: 8836 [2021-06-05 23:51:28,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 2201.7ms TimeCoverageRelationStatistics Valid=895, Invalid=4655, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:51:28,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-06-05 23:51:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 6451. [2021-06-05 23:51:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6451 states, 6450 states have (on average 3.3206201550387595) internal successors, (21418), 6450 states have internal predecessors, (21418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6451 states to 6451 states and 21418 transitions. [2021-06-05 23:51:28,570 INFO L78 Accepts]: Start accepts. Automaton has 6451 states and 21418 transitions. Word has length 30 [2021-06-05 23:51:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:28,570 INFO L482 AbstractCegarLoop]: Abstraction has 6451 states and 21418 transitions. [2021-06-05 23:51:28,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:28,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6451 states and 21418 transitions. [2021-06-05 23:51:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:28,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:28,578 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:28,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 23:51:28,779 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:28,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash 784800184, now seen corresponding path program 121 times [2021-06-05 23:51:28,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:28,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238386101] [2021-06-05 23:51:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:29,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:29,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238386101] [2021-06-05 23:51:29,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238386101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:29,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86627554] [2021-06-05 23:51:29,025 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 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 23:51:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:29,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:51:29,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:29,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:29,277 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 23:51:29,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 143 [2021-06-05 23:51:29,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:29,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:29,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:29,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:29,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:51:29,288 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:29,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:29,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:29,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:180, output treesize:3 [2021-06-05 23:51:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:29,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86627554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:29,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:29,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 23:51:29,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126075014] [2021-06-05 23:51:29,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:51:29,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:29,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:51:29,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:51:29,315 INFO L87 Difference]: Start difference. First operand 6451 states and 21418 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:32,702 INFO L93 Difference]: Finished difference Result 9250 states and 30269 transitions. [2021-06-05 23:51:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:51:32,702 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:32,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:32,716 INFO L225 Difference]: With dead ends: 9250 [2021-06-05 23:51:32,716 INFO L226 Difference]: Without dead ends: 9195 [2021-06-05 23:51:32,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 2710.8ms TimeCoverageRelationStatistics Valid=1308, Invalid=6002, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 23:51:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9195 states. [2021-06-05 23:51:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9195 to 6570. [2021-06-05 23:51:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.3301872431115846) internal successors, (21876), 6569 states have internal predecessors, (21876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 21876 transitions. [2021-06-05 23:51:32,813 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 21876 transitions. Word has length 30 [2021-06-05 23:51:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:32,814 INFO L482 AbstractCegarLoop]: Abstraction has 6570 states and 21876 transitions. [2021-06-05 23:51:32,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 21876 transitions. [2021-06-05 23:51:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:32,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:32,822 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:33,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 23:51:33,022 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash -489396616, now seen corresponding path program 122 times [2021-06-05 23:51:33,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:33,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672461036] [2021-06-05 23:51:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:33,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:33,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672461036] [2021-06-05 23:51:33,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672461036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:33,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979377583] [2021-06-05 23:51:33,253 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 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 23:51:33,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:51:33,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:33,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:51:33,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:33,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:33,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:33,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:33,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:33,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-06-05 23:51:33,534 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:51:33,561 INFO L628 ElimStorePlain]: treesize reduction 87, result has 33.1 percent of original size [2021-06-05 23:51:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:33,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:33,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:33,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:33,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-06-05 23:51:33,567 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:33,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:33,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:33,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:25 [2021-06-05 23:51:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:33,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979377583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:33,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:33,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 23:51:33,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971513290] [2021-06-05 23:51:33,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:51:33,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:51:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:51:33,686 INFO L87 Difference]: Start difference. First operand 6570 states and 21876 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:39,049 INFO L93 Difference]: Finished difference Result 10481 states and 33830 transitions. [2021-06-05 23:51:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 23:51:39,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:39,065 INFO L225 Difference]: With dead ends: 10481 [2021-06-05 23:51:39,065 INFO L226 Difference]: Without dead ends: 10428 [2021-06-05 23:51:39,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4684 ImplicationChecksByTransitivity, 4121.7ms TimeCoverageRelationStatistics Valid=2022, Invalid=11318, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 23:51:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10428 states. [2021-06-05 23:51:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10428 to 6907. [2021-06-05 23:51:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 3.3430350419924704) internal successors, (23087), 6906 states have internal predecessors, (23087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 23087 transitions. [2021-06-05 23:51:39,196 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 23087 transitions. Word has length 30 [2021-06-05 23:51:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:39,196 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 23087 transitions. [2021-06-05 23:51:39,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 23087 transitions. [2021-06-05 23:51:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:39,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:39,204 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:39,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:39,405 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1710621877, now seen corresponding path program 119 times [2021-06-05 23:51:39,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:39,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990388836] [2021-06-05 23:51:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:39,591 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 23:51:39,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:39,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990388836] [2021-06-05 23:51:39,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990388836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:39,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153465480] [2021-06-05 23:51:39,591 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 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 23:51:39,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:51:39,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:39,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:51:39,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:39,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:39,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:39,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:51:39,830 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:39,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:39,839 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:51:39,840 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:39,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:39,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:39,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:19 [2021-06-05 23:51:39,892 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 23:51:39,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153465480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:39,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:39,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:51:39,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940344579] [2021-06-05 23:51:39,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:51:39,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:51:39,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:51:39,893 INFO L87 Difference]: Start difference. First operand 6907 states and 23087 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:41,474 INFO L93 Difference]: Finished difference Result 9040 states and 29852 transitions. [2021-06-05 23:51:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:51:41,474 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:41,488 INFO L225 Difference]: With dead ends: 9040 [2021-06-05 23:51:41,488 INFO L226 Difference]: Without dead ends: 9021 [2021-06-05 23:51:41,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1048.7ms TimeCoverageRelationStatistics Valid=346, Invalid=1724, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:51:41,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9021 states. [2021-06-05 23:51:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9021 to 6894. [2021-06-05 23:51:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6894 states, 6893 states have (on average 3.3419410996663284) internal successors, (23036), 6893 states have internal predecessors, (23036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6894 states to 6894 states and 23036 transitions. [2021-06-05 23:51:41,594 INFO L78 Accepts]: Start accepts. Automaton has 6894 states and 23036 transitions. Word has length 30 [2021-06-05 23:51:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:41,594 INFO L482 AbstractCegarLoop]: Abstraction has 6894 states and 23036 transitions. [2021-06-05 23:51:41,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6894 states and 23036 transitions. [2021-06-05 23:51:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:41,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:41,603 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:41,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:41,812 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash 848022863, now seen corresponding path program 120 times [2021-06-05 23:51:41,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:41,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634386003] [2021-06-05 23:51:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:41,993 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 23:51:41,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:41,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634386003] [2021-06-05 23:51:41,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634386003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:41,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563847254] [2021-06-05 23:51:41,993 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 23:51:42,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:51:42,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:42,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:51:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:42,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:42,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:42,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 23:51:42,170 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:42,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:42,178 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:51:42,179 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:42,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:42,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:42,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:51:42,262 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 23:51:42,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563847254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:42,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:42,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:51:42,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426342551] [2021-06-05 23:51:42,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:51:42,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:42,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:51:42,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:51:42,263 INFO L87 Difference]: Start difference. First operand 6894 states and 23036 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:43,806 INFO L93 Difference]: Finished difference Result 8685 states and 28730 transitions. [2021-06-05 23:51:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:51:43,806 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:43,820 INFO L225 Difference]: With dead ends: 8685 [2021-06-05 23:51:43,820 INFO L226 Difference]: Without dead ends: 8660 [2021-06-05 23:51:43,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1152.4ms TimeCoverageRelationStatistics Valid=366, Invalid=2184, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:51:43,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8660 states. [2021-06-05 23:51:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8660 to 6872. [2021-06-05 23:51:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6872 states, 6871 states have (on average 3.342890408965216) internal successors, (22969), 6871 states have internal predecessors, (22969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6872 states to 6872 states and 22969 transitions. [2021-06-05 23:51:43,958 INFO L78 Accepts]: Start accepts. Automaton has 6872 states and 22969 transitions. Word has length 30 [2021-06-05 23:51:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:43,958 INFO L482 AbstractCegarLoop]: Abstraction has 6872 states and 22969 transitions. [2021-06-05 23:51:43,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 6872 states and 22969 transitions. [2021-06-05 23:51:43,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:43,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:43,967 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:44,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 23:51:44,168 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:44,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:44,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1496429715, now seen corresponding path program 121 times [2021-06-05 23:51:44,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:44,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507515595] [2021-06-05 23:51:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:44,364 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 23:51:44,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:44,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507515595] [2021-06-05 23:51:44,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507515595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:44,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376729634] [2021-06-05 23:51:44,364 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 23:51:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:51:44,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:44,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:44,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:44,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:51:44,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:44,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:44,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:44,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:51:44,600 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:44,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:44,617 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:51:44,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:51:44,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:44,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:44,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:44,637 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:57 [2021-06-05 23:51:44,751 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 23:51:44,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376729634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:44,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:44,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:51:44,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103809023] [2021-06-05 23:51:44,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:51:44,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:44,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:51:44,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:51:44,752 INFO L87 Difference]: Start difference. First operand 6872 states and 22969 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:46,173 INFO L93 Difference]: Finished difference Result 9213 states and 30483 transitions. [2021-06-05 23:51:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:51:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:46,186 INFO L225 Difference]: With dead ends: 9213 [2021-06-05 23:51:46,186 INFO L226 Difference]: Without dead ends: 9163 [2021-06-05 23:51:46,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1214.3ms TimeCoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:51:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9163 states. [2021-06-05 23:51:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9163 to 6869. [2021-06-05 23:51:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6869 states, 6868 states have (on average 3.3424577751892834) internal successors, (22956), 6868 states have internal predecessors, (22956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6869 states to 6869 states and 22956 transitions. [2021-06-05 23:51:46,288 INFO L78 Accepts]: Start accepts. Automaton has 6869 states and 22956 transitions. Word has length 30 [2021-06-05 23:51:46,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:46,288 INFO L482 AbstractCegarLoop]: Abstraction has 6869 states and 22956 transitions. [2021-06-05 23:51:46,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 6869 states and 22956 transitions. [2021-06-05 23:51:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:46,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:46,297 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:46,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 23:51:46,497 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:46,497 INFO L82 PathProgramCache]: Analyzing trace with hash -761866816, now seen corresponding path program 123 times [2021-06-05 23:51:46,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:46,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409358461] [2021-06-05 23:51:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:46,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:46,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409358461] [2021-06-05 23:51:46,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409358461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:46,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973432453] [2021-06-05 23:51:46,748 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 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 23:51:46,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:51:46,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:46,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:51:46,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:47,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:47,075 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-05 23:51:47,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 130 [2021-06-05 23:51:47,090 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:47,135 INFO L628 ElimStorePlain]: treesize reduction 266, result has 12.8 percent of original size [2021-06-05 23:51:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:47,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:47,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 23:51:47,140 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:47,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:47,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:47,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:136, output treesize:39 [2021-06-05 23:51:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:47,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973432453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:47,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:47,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:51:47,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600464912] [2021-06-05 23:51:47,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:51:47,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:47,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:51:47,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:51:47,341 INFO L87 Difference]: Start difference. First operand 6869 states and 22956 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:55,277 INFO L93 Difference]: Finished difference Result 8677 states and 28456 transitions. [2021-06-05 23:51:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:51:55,277 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:51:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:55,290 INFO L225 Difference]: With dead ends: 8677 [2021-06-05 23:51:55,290 INFO L226 Difference]: Without dead ends: 8624 [2021-06-05 23:51:55,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 2550.7ms TimeCoverageRelationStatistics Valid=509, Invalid=3523, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:51:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8624 states. [2021-06-05 23:51:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8624 to 6891. [2021-06-05 23:51:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6891 states, 6890 states have (on average 3.3422351233671987) internal successors, (23028), 6890 states have internal predecessors, (23028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6891 states to 6891 states and 23028 transitions. [2021-06-05 23:51:55,387 INFO L78 Accepts]: Start accepts. Automaton has 6891 states and 23028 transitions. Word has length 30 [2021-06-05 23:51:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:55,387 INFO L482 AbstractCegarLoop]: Abstraction has 6891 states and 23028 transitions. [2021-06-05 23:51:55,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 6891 states and 23028 transitions. [2021-06-05 23:51:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:55,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:55,396 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:55,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-06-05 23:51:55,596 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash 362875187, now seen corresponding path program 122 times [2021-06-05 23:51:55,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:55,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109736256] [2021-06-05 23:51:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:55,841 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 23:51:55,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:55,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109736256] [2021-06-05 23:51:55,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109736256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:55,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119084771] [2021-06-05 23:51:55,842 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 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 23:51:55,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:51:55,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:55,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:51:55,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:56,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:56,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:56,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:51:56,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:56,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:56,286 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:51:56,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:56,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:56,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:56,295 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-06-05 23:51:56,316 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 23:51:56,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119084771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:56,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:56,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:51:56,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994287909] [2021-06-05 23:51:56,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:51:56,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:56,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:51:56,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:51:56,317 INFO L87 Difference]: Start difference. First operand 6891 states and 23028 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 23:51:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:57,772 INFO L93 Difference]: Finished difference Result 8231 states and 27294 transitions. [2021-06-05 23:51:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:51:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) Word has length 30 [2021-06-05 23:51:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:57,785 INFO L225 Difference]: With dead ends: 8231 [2021-06-05 23:51:57,785 INFO L226 Difference]: Without dead ends: 8216 [2021-06-05 23:51:57,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 922.6ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:51:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2021-06-05 23:51:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 6896. [2021-06-05 23:51:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6896 states, 6895 states have (on average 3.341986947063089) internal successors, (23043), 6895 states have internal predecessors, (23043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6896 states to 6896 states and 23043 transitions. [2021-06-05 23:51:57,879 INFO L78 Accepts]: Start accepts. Automaton has 6896 states and 23043 transitions. Word has length 30 [2021-06-05 23:51:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:57,879 INFO L482 AbstractCegarLoop]: Abstraction has 6896 states and 23043 transitions. [2021-06-05 23:51:57,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 23:51:57,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6896 states and 23043 transitions. [2021-06-05 23:51:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:51:57,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:57,888 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:58,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:58,089 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2126543973, now seen corresponding path program 123 times [2021-06-05 23:51:58,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:58,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58018550] [2021-06-05 23:51:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:58,284 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 23:51:58,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58018550] [2021-06-05 23:51:58,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58018550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212521582] [2021-06-05 23:51:58,285 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 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 23:51:58,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:51:58,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:58,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:51:58,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:58,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:58,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:58,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:51:58,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:58,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:58,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:58,591 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:51:58,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:51:58,593 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:58,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:51:58,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:58,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:58,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:58,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:58,622 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:56 [2021-06-05 23:51:58,703 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 23:51:58,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212521582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:58,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:58,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:51:58,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585596281] [2021-06-05 23:51:58,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:51:58,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:58,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:51:58,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:51:58,704 INFO L87 Difference]: Start difference. First operand 6896 states and 23043 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:00,277 INFO L93 Difference]: Finished difference Result 9223 states and 30413 transitions. [2021-06-05 23:52:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:52:00,277 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:52:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:00,291 INFO L225 Difference]: With dead ends: 9223 [2021-06-05 23:52:00,291 INFO L226 Difference]: Without dead ends: 9204 [2021-06-05 23:52:00,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1135.4ms TimeCoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:52:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9204 states. [2021-06-05 23:52:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9204 to 6876. [2021-06-05 23:52:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6876 states, 6875 states have (on average 3.3396363636363637) internal successors, (22960), 6875 states have internal predecessors, (22960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6876 states to 6876 states and 22960 transitions. [2021-06-05 23:52:00,399 INFO L78 Accepts]: Start accepts. Automaton has 6876 states and 22960 transitions. Word has length 30 [2021-06-05 23:52:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:00,399 INFO L482 AbstractCegarLoop]: Abstraction has 6876 states and 22960 transitions. [2021-06-05 23:52:00,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 6876 states and 22960 transitions. [2021-06-05 23:52:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:52:00,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:00,408 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:00,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:00,609 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1093492581, now seen corresponding path program 124 times [2021-06-05 23:52:00,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:00,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301962797] [2021-06-05 23:52:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:00,804 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 23:52:00,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:00,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301962797] [2021-06-05 23:52:00,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301962797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:00,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127294082] [2021-06-05 23:52:00,804 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 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 23:52:00,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:00,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:00,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:52:00,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:01,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:01,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:52:01,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:01,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:01,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:01,068 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:52:01,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:52:01,069 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:01,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 23:52:01,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:01,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:01,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:01,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:01,093 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:44 [2021-06-05 23:52:01,210 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 23:52:01,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127294082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:01,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:01,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:52:01,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936335533] [2021-06-05 23:52:01,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:52:01,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:52:01,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:52:01,211 INFO L87 Difference]: Start difference. First operand 6876 states and 22960 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:02,580 INFO L93 Difference]: Finished difference Result 8789 states and 29021 transitions. [2021-06-05 23:52:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:52:02,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:52:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:02,593 INFO L225 Difference]: With dead ends: 8789 [2021-06-05 23:52:02,593 INFO L226 Difference]: Without dead ends: 8764 [2021-06-05 23:52:02,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1158.3ms TimeCoverageRelationStatistics Valid=378, Invalid=1514, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:52:02,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-06-05 23:52:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 6871. [2021-06-05 23:52:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6871 states, 6870 states have (on average 3.3395924308588065) internal successors, (22943), 6870 states have internal predecessors, (22943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6871 states to 6871 states and 22943 transitions. [2021-06-05 23:52:02,693 INFO L78 Accepts]: Start accepts. Automaton has 6871 states and 22943 transitions. Word has length 30 [2021-06-05 23:52:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:02,693 INFO L482 AbstractCegarLoop]: Abstraction has 6871 states and 22943 transitions. [2021-06-05 23:52:02,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6871 states and 22943 transitions. [2021-06-05 23:52:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:52:02,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:02,701 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:02,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:02,905 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:02,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1305824309, now seen corresponding path program 125 times [2021-06-05 23:52:02,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:02,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545185852] [2021-06-05 23:52:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:03,139 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 23:52:03,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:03,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545185852] [2021-06-05 23:52:03,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545185852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:03,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256197522] [2021-06-05 23:52:03,139 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 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 23:52:03,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:52:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:52:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:03,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:03,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:03,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-06-05 23:52:03,389 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:03,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:03,398 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:52:03,400 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:03,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:03,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:03,410 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:21 [2021-06-05 23:52:03,474 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 23:52:03,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256197522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:03,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:03,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:52:03,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362086444] [2021-06-05 23:52:03,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:52:03,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:52:03,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:52:03,475 INFO L87 Difference]: Start difference. First operand 6871 states and 22943 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:04,513 INFO L93 Difference]: Finished difference Result 8601 states and 28414 transitions. [2021-06-05 23:52:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:52:04,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:52:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:04,526 INFO L225 Difference]: With dead ends: 8601 [2021-06-05 23:52:04,526 INFO L226 Difference]: Without dead ends: 8576 [2021-06-05 23:52:04,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 941.3ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:52:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8576 states. [2021-06-05 23:52:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8576 to 6846. [2021-06-05 23:52:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6846 states, 6845 states have (on average 3.3398100803506208) internal successors, (22861), 6845 states have internal predecessors, (22861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6846 states to 6846 states and 22861 transitions. [2021-06-05 23:52:04,626 INFO L78 Accepts]: Start accepts. Automaton has 6846 states and 22861 transitions. Word has length 30 [2021-06-05 23:52:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:04,626 INFO L482 AbstractCegarLoop]: Abstraction has 6846 states and 22861 transitions. [2021-06-05 23:52:04,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6846 states and 22861 transitions. [2021-06-05 23:52:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:52:04,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:04,634 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:04,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-06-05 23:52:04,835 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:04,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1544293653, now seen corresponding path program 126 times [2021-06-05 23:52:04,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:04,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981974451] [2021-06-05 23:52:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:05,068 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 23:52:05,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:05,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981974451] [2021-06-05 23:52:05,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981974451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:05,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039009246] [2021-06-05 23:52:05,069 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 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 23:52:05,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:52:05,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:05,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:05,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:52:05,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:05,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,433 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:52:05,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-06-05 23:52:05,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:05,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:52:05,439 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:05,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:05,472 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:80 [2021-06-05 23:52:05,618 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 23:52:05,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039009246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:05,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:05,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:52:05,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400632549] [2021-06-05 23:52:05,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:52:05,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:05,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:52:05,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:52:05,619 INFO L87 Difference]: Start difference. First operand 6846 states and 22861 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:08,889 INFO L93 Difference]: Finished difference Result 9232 states and 30224 transitions. [2021-06-05 23:52:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:52:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:52:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:08,904 INFO L225 Difference]: With dead ends: 9232 [2021-06-05 23:52:08,904 INFO L226 Difference]: Without dead ends: 9187 [2021-06-05 23:52:08,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 2256.1ms TimeCoverageRelationStatistics Valid=534, Invalid=3498, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:52:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-06-05 23:52:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 6832. [2021-06-05 23:52:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6832 states, 6831 states have (on average 3.3399209486166006) internal successors, (22815), 6831 states have internal predecessors, (22815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6832 states to 6832 states and 22815 transitions. [2021-06-05 23:52:09,008 INFO L78 Accepts]: Start accepts. Automaton has 6832 states and 22815 transitions. Word has length 30 [2021-06-05 23:52:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:09,008 INFO L482 AbstractCegarLoop]: Abstraction has 6832 states and 22815 transitions. [2021-06-05 23:52:09,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 6832 states and 22815 transitions. [2021-06-05 23:52:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:52:09,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:09,017 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:09,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:09,217 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:09,218 INFO L82 PathProgramCache]: Analyzing trace with hash 334164591, now seen corresponding path program 127 times [2021-06-05 23:52:09,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:09,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787270074] [2021-06-05 23:52:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:09,425 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 23:52:09,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:09,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787270074] [2021-06-05 23:52:09,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787270074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:09,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545350795] [2021-06-05 23:52:09,426 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 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 23:52:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:09,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:52:09,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:09,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:09,762 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 23:52:09,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 147 treesize of output 127 [2021-06-05 23:52:09,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:09,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:09,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:09,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:52:09,774 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:09,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:09,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:09,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:155, output treesize:3 [2021-06-05 23:52:09,800 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 23:52:09,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545350795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:09,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:09,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:52:09,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382463144] [2021-06-05 23:52:09,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:52:09,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:09,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:52:09,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:52:09,801 INFO L87 Difference]: Start difference. First operand 6832 states and 22815 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:10,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:10,322 INFO L93 Difference]: Finished difference Result 7624 states and 25269 transitions. [2021-06-05 23:52:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:52:10,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:52:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:10,334 INFO L225 Difference]: With dead ends: 7624 [2021-06-05 23:52:10,334 INFO L226 Difference]: Without dead ends: 7605 [2021-06-05 23:52:10,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 558.9ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2021-06-05 23:52:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 6840. [2021-06-05 23:52:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 3.3401082029536484) internal successors, (22843), 6839 states have internal predecessors, (22843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 22843 transitions. [2021-06-05 23:52:10,453 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 22843 transitions. Word has length 30 [2021-06-05 23:52:10,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:10,453 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 22843 transitions. [2021-06-05 23:52:10,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:10,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 22843 transitions. [2021-06-05 23:52:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:52:10,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:10,462 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:10,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:10,662 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1723685807, now seen corresponding path program 128 times [2021-06-05 23:52:10,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:10,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506998586] [2021-06-05 23:52:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:10,881 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 23:52:10,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:10,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506998586] [2021-06-05 23:52:10,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506998586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:10,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596770893] [2021-06-05 23:52:10,881 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 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 23:52:10,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:52:10,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:52:10,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:11,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:11,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:52:11,104 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:11,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:11,113 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:52:11,114 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:11,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:11,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:11,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 23:52:11,167 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 23:52:11,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596770893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:11,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:11,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:52:11,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269711765] [2021-06-05 23:52:11,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:52:11,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:11,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:52:11,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:52:11,168 INFO L87 Difference]: Start difference. First operand 6840 states and 22843 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:12,436 INFO L93 Difference]: Finished difference Result 9023 states and 29776 transitions. [2021-06-05 23:52:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:52:12,436 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:52:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:12,450 INFO L225 Difference]: With dead ends: 9023 [2021-06-05 23:52:12,450 INFO L226 Difference]: Without dead ends: 8973 [2021-06-05 23:52:12,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1001.9ms TimeCoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:52:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8973 states. [2021-06-05 23:52:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8973 to 6793. [2021-06-05 23:52:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 3.336866902237927) internal successors, (22664), 6792 states have internal predecessors, (22664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 22664 transitions. [2021-06-05 23:52:12,551 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 22664 transitions. Word has length 30 [2021-06-05 23:52:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:12,551 INFO L482 AbstractCegarLoop]: Abstraction has 6793 states and 22664 transitions. [2021-06-05 23:52:12,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 22664 transitions. [2021-06-05 23:52:12,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:52:12,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:12,559 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:12,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable715 [2021-06-05 23:52:12,760 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:12,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1166330747, now seen corresponding path program 129 times [2021-06-05 23:52:12,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:12,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464847836] [2021-06-05 23:52:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:13,001 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 23:52:13,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:13,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464847836] [2021-06-05 23:52:13,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464847836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:13,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287581449] [2021-06-05 23:52:13,001 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 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 23:52:13,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:52:13,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:13,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:13,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:13,319 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-06-05 23:52:13,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:13,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:13,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:13,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 23:52:13,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:13,401 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-06-05 23:52:13,401 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 60 [2021-06-05 23:52:13,407 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:13,497 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.5 percent of original size [2021-06-05 23:52:13,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:13,504 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:44, output treesize:98 [2021-06-05 23:52:13,789 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 23:52:13,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287581449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:13,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:13,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 23:52:13,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058280163] [2021-06-05 23:52:13,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:52:13,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:13,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:52:13,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:52:13,790 INFO L87 Difference]: Start difference. First operand 6793 states and 22664 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:14,362 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-06-05 23:52:16,002 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 23:52:16,830 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-06-05 23:52:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:17,340 INFO L93 Difference]: Finished difference Result 9109 states and 29812 transitions. [2021-06-05 23:52:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:52:17,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:52:17,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:17,356 INFO L225 Difference]: With dead ends: 9109 [2021-06-05 23:52:17,356 INFO L226 Difference]: Without dead ends: 9079 [2021-06-05 23:52:17,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2891.6ms TimeCoverageRelationStatistics Valid=642, Invalid=3390, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:52:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9079 states. [2021-06-05 23:52:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9079 to 6790. [2021-06-05 23:52:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6790 states, 6789 states have (on average 3.336573869494771) internal successors, (22652), 6789 states have internal predecessors, (22652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6790 states to 6790 states and 22652 transitions. [2021-06-05 23:52:17,464 INFO L78 Accepts]: Start accepts. Automaton has 6790 states and 22652 transitions. Word has length 30 [2021-06-05 23:52:17,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:17,464 INFO L482 AbstractCegarLoop]: Abstraction has 6790 states and 22652 transitions. [2021-06-05 23:52:17,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 6790 states and 22652 transitions. [2021-06-05 23:52:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:52:17,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:17,474 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:17,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:17,676 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:17,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1114852723, now seen corresponding path program 130 times [2021-06-05 23:52:17,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:17,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475219501] [2021-06-05 23:52:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:17,956 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 23:52:17,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:17,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475219501] [2021-06-05 23:52:17,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475219501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:17,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257175673] [2021-06-05 23:52:17,957 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 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 23:52:17,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:17,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:17,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:18,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:18,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:18,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 23:52:18,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:18,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:18,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:18,241 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-06-05 23:52:18,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:18,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:18,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:18,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 23:52:18,266 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 23:52:18,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257175673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:18,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:18,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:52:18,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100586123] [2021-06-05 23:52:18,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:52:18,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:18,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:52:18,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:52:18,267 INFO L87 Difference]: Start difference. First operand 6790 states and 22652 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:19,835 INFO L93 Difference]: Finished difference Result 8665 states and 28611 transitions. [2021-06-05 23:52:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:52:19,835 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:52:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:19,849 INFO L225 Difference]: With dead ends: 8665 [2021-06-05 23:52:19,849 INFO L226 Difference]: Without dead ends: 8650 [2021-06-05 23:52:19,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1133.0ms TimeCoverageRelationStatistics Valid=336, Invalid=1734, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:52:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8650 states. [2021-06-05 23:52:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8650 to 6798. [2021-06-05 23:52:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6798 states, 6797 states have (on average 3.3373547153155805) internal successors, (22684), 6797 states have internal predecessors, (22684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6798 states to 6798 states and 22684 transitions. [2021-06-05 23:52:19,963 INFO L78 Accepts]: Start accepts. Automaton has 6798 states and 22684 transitions. Word has length 30 [2021-06-05 23:52:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:19,963 INFO L482 AbstractCegarLoop]: Abstraction has 6798 states and 22684 transitions. [2021-06-05 23:52:19,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6798 states and 22684 transitions. [2021-06-05 23:52:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:52:19,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:19,973 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:20,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:20,175 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:20,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:20,175 INFO L82 PathProgramCache]: Analyzing trace with hash 656993804, now seen corresponding path program 124 times [2021-06-05 23:52:20,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:20,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246426152] [2021-06-05 23:52:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:20,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246426152] [2021-06-05 23:52:20,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246426152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146457749] [2021-06-05 23:52:20,447 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 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 23:52:20,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:20,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:20,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:20,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:20,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:20,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:20,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:20,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:52:20,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:20,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:20,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:20,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:52:20,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:20,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:20,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:20,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:52:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:20,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146457749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:20,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:20,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:52:20,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604753918] [2021-06-05 23:52:20,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:52:20,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:20,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:52:20,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:52:20,736 INFO L87 Difference]: Start difference. First operand 6798 states and 22684 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:52:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:23,237 INFO L93 Difference]: Finished difference Result 9000 states and 29610 transitions. [2021-06-05 23:52:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 23:52:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) Word has length 30 [2021-06-05 23:52:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:23,251 INFO L225 Difference]: With dead ends: 9000 [2021-06-05 23:52:23,251 INFO L226 Difference]: Without dead ends: 8974 [2021-06-05 23:52:23,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 2060.6ms TimeCoverageRelationStatistics Valid=762, Invalid=4350, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:52:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2021-06-05 23:52:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 6798. [2021-06-05 23:52:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6798 states, 6797 states have (on average 3.3373547153155805) internal successors, (22684), 6797 states have internal predecessors, (22684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6798 states to 6798 states and 22684 transitions. [2021-06-05 23:52:23,348 INFO L78 Accepts]: Start accepts. Automaton has 6798 states and 22684 transitions. Word has length 30 [2021-06-05 23:52:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:23,348 INFO L482 AbstractCegarLoop]: Abstraction has 6798 states and 22684 transitions. [2021-06-05 23:52:23,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:52:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 6798 states and 22684 transitions. [2021-06-05 23:52:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:52:23,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:23,357 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:23,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:23,557 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:23,557 INFO L82 PathProgramCache]: Analyzing trace with hash 338491856, now seen corresponding path program 125 times [2021-06-05 23:52:23,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:23,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841877953] [2021-06-05 23:52:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:23,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:23,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841877953] [2021-06-05 23:52:23,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841877953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:23,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33482690] [2021-06-05 23:52:23,833 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 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 23:52:23,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:52:23,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:23,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:24,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:24,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:24,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:24,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:24,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 23:52:24,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:24,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:24,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:24,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:24,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:24,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-06-05 23:52:24,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:24,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:24,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:24,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-06-05 23:52:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:24,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33482690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:24,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:24,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:52:24,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103725709] [2021-06-05 23:52:24,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:52:24,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:52:24,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:52:24,132 INFO L87 Difference]: Start difference. First operand 6798 states and 22684 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:52:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:27,382 INFO L93 Difference]: Finished difference Result 8960 states and 29460 transitions. [2021-06-05 23:52:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:52:27,382 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) Word has length 30 [2021-06-05 23:52:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:27,396 INFO L225 Difference]: With dead ends: 8960 [2021-06-05 23:52:27,396 INFO L226 Difference]: Without dead ends: 8934 [2021-06-05 23:52:27,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 2270.4ms TimeCoverageRelationStatistics Valid=784, Invalid=4766, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:52:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8934 states. [2021-06-05 23:52:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8934 to 6802. [2021-06-05 23:52:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6802 states, 6801 states have (on average 3.3368622261432144) internal successors, (22694), 6801 states have internal predecessors, (22694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6802 states to 6802 states and 22694 transitions. [2021-06-05 23:52:27,498 INFO L78 Accepts]: Start accepts. Automaton has 6802 states and 22694 transitions. Word has length 30 [2021-06-05 23:52:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:27,498 INFO L482 AbstractCegarLoop]: Abstraction has 6802 states and 22694 transitions. [2021-06-05 23:52:27,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23:52:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6802 states and 22694 transitions. [2021-06-05 23:52:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:52:27,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:27,508 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:27,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:27,708 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:27,709 INFO L82 PathProgramCache]: Analyzing trace with hash -919936116, now seen corresponding path program 126 times [2021-06-05 23:52:27,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:27,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520791645] [2021-06-05 23:52:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:27,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:27,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520791645] [2021-06-05 23:52:27,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520791645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:27,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432147558] [2021-06-05 23:52:27,983 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 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 23:52:28,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:52:28,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:28,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:28,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:28,462 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-06-05 23:52:28,462 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 115 [2021-06-05 23:52:28,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:28,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:28,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:28,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:28,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:28,508 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 23:52:28,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2021-06-05 23:52:28,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:28,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:28,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:28,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 23:52:28,514 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:28,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:28,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:28,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:52:28,546 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:137, output treesize:59 [2021-06-05 23:52:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:28,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432147558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:28,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:28,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:52:28,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626492670] [2021-06-05 23:52:28,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:28,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:28,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:28,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:28,679 INFO L87 Difference]: Start difference. First operand 6802 states and 22694 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 23:52:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:52:42,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-06-05 23:52:42,381 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:52:42,386 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:52:42,387 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:52:42,387 INFO L202 PluginConnector]: Adding new model array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:52:42 BasicIcfg [2021-06-05 23:52:42,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:52:42,388 INFO L168 Benchmark]: Toolchain (without parser) took 770130.73 ms. Allocated memory was 348.1 MB in the beginning and 1.3 GB in the end (delta: 989.9 MB). Free memory was 327.7 MB in the beginning and 576.5 MB in the end (delta: -248.7 MB). Peak memory consumption was 744.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:52:42,388 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 348.1 MB. Free memory was 328.9 MB in the beginning and 328.8 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:52:42,388 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.63 ms. Allocated memory is still 348.1 MB. Free memory was 327.6 MB in the beginning and 326.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:52:42,388 INFO L168 Benchmark]: Boogie Preprocessor took 13.98 ms. Allocated memory is still 348.1 MB. Free memory was 326.1 MB in the beginning and 325.2 MB in the end (delta: 927.6 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 23:52:42,388 INFO L168 Benchmark]: RCFGBuilder took 268.99 ms. Allocated memory is still 348.1 MB. Free memory was 325.0 MB in the beginning and 313.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:52:42,388 INFO L168 Benchmark]: TraceAbstraction took 769816.82 ms. Allocated memory was 348.1 MB in the beginning and 1.3 GB in the end (delta: 989.9 MB). Free memory was 313.1 MB in the beginning and 576.5 MB in the end (delta: -263.4 MB). Peak memory consumption was 729.8 MB. Max. memory is 16.0 GB. [2021-06-05 23:52:42,388 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 0.15 ms. Allocated memory is still 348.1 MB. Free memory was 328.9 MB in the beginning and 328.8 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.63 ms. Allocated memory is still 348.1 MB. Free memory was 327.6 MB in the beginning and 326.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.98 ms. Allocated memory is still 348.1 MB. Free memory was 326.1 MB in the beginning and 325.2 MB in the end (delta: 927.6 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 268.99 ms. Allocated memory is still 348.1 MB. Free memory was 325.0 MB in the beginning and 313.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 769816.82 ms. Allocated memory was 348.1 MB in the beginning and 1.3 GB in the end (delta: 989.9 MB). Free memory was 313.1 MB in the beginning and 576.5 MB in the end (delta: -263.4 MB). Peak memory consumption was 729.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (6802states) and FLOYD_HOARE automaton (currently 58 states, 27 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 80 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 769646.9ms, OverallIterations: 259, TraceHistogramMax: 2, EmptinessCheckTime: 1492.0ms, AutomataDifference: 547238.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 93.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13683 SDtfs, 69624 SDslu, 137276 SDs, 0 SdLazy, 305937 SolverSat, 22411 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 164828.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19396 GetRequests, 5258 SyntacticMatches, 438 SemanticMatches, 13699 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275302 ImplicationChecksByTransitivity, 446354.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6907occurred in iteration=243, InterpolantAutomatonStates: 10199, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17422.6ms AutomataMinimizationTime, 258 MinimizatonAttempts, 434045 StatesRemovedByMinimization, 258 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 824.3ms SsaConstructionTime, 2487.2ms SatisfiabilityAnalysisTime, 142682.3ms InterpolantComputationTime, 15156 NumberOfCodeBlocks, 15156 NumberOfCodeBlocksAsserted, 839 NumberOfCheckSat, 14641 ConstructedInterpolants, 460 QuantifiedInterpolants, 295007 SizeOfPredicates, 2029 NumberOfNonLiveVariables, 16676 ConjunctsInSsa, 5853 ConjunctsInUnsatCore, 515 InterpolantComputations, 3 PerfectInterpolantSequences, 138/3990 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