/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:30:38,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:30:38,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:30:38,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:30:38,315 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 [2021-03-10 21:30:38,342 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:30:38,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:30:38,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:30:38,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:30:38,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:30:38,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:30:38,345 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:30:38,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:30:38,345 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:30:38,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:30:38,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:30:38,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:30:38,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:30:38,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:30:38,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:30:38,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:30:38,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:30:38,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:30:38,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:30:38,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:30:38,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:30:38,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:30:38,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:30:38,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:30:38,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:30:38,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:30:38,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:30:38,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:30:38,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:30:38,348 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:30:38,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:30:38,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:30:38,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:30:38,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:30:38,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:30:38,633 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:30:38,634 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:30:38,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl [2021-03-10 21:30:38,634 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl' [2021-03-10 21:30:38,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:30:38,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:30:38,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:30:38,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:30:38,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:30:38,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (1/1) ... [2021-03-10 21:30:38,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (1/1) ... [2021-03-10 21:30:38,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:30:38,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:30:38,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:30:38,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:30:38,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (1/1) ... [2021-03-10 21:30:38,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (1/1) ... [2021-03-10 21:30:38,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (1/1) ... [2021-03-10 21:30:38,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (1/1) ... [2021-03-10 21:30:38,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (1/1) ... [2021-03-10 21:30:38,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (1/1) ... [2021-03-10 21:30:38,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (1/1) ... [2021-03-10 21:30:38,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:30:38,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:30:38,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:30:38,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:30:38,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (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 [2021-03-10 21:30:38,768 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:30:38,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:30:38,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:30:38,769 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:30:38,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:30:38,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:30:38,769 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:30:38,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:30:38,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:30:38,770 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:30:39,012 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:30:39,012 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 21:30:39,013 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 21:30:39,014 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:30:39 BoogieIcfgContainer [2021-03-10 21:30:39,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:30:39,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:30:39,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:30:39,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:30:39,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:30:38" (1/2) ... [2021-03-10 21:30:39,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6e3cbe and model type unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:30:39, skipping insertion in model container [2021-03-10 21:30:39,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:30:39" (2/2) ... [2021-03-10 21:30:39,018 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.bpl [2021-03-10 21:30:39,022 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:30:39,022 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:30:39,024 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:30:39,025 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:30:39,053 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:30:39,063 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:30:39,075 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:30:39,075 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:30:39,076 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:30:39,076 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:30:39,076 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:30:39,077 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:30:39,077 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:30:39,077 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:30:39,082 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-03-10 21:30:39,087 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:30:39,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:39,092 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:39,093 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1298021065, now seen corresponding path program 1 times [2021-03-10 21:30:39,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:39,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284116386] [2021-03-10 21:30:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:39,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284116386] [2021-03-10 21:30:39,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:30:39,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:30:39,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229933177] [2021-03-10 21:30:39,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:30:39,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:39,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:30:39,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:30:39,261 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:39,314 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-03-10 21:30:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:30:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 21:30:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:39,322 INFO L225 Difference]: With dead ends: 26 [2021-03-10 21:30:39,322 INFO L226 Difference]: Without dead ends: 18 [2021-03-10 21:30:39,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:30:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-03-10 21:30:39,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-03-10 21:30:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-03-10 21:30:39,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-03-10 21:30:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:39,350 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-03-10 21:30:39,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-03-10 21:30:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:30:39,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:39,350 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:39,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:30:39,351 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:39,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:39,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1253032747, now seen corresponding path program 2 times [2021-03-10 21:30:39,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:39,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370545779] [2021-03-10 21:30:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:39,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370545779] [2021-03-10 21:30:39,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:30:39,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:30:39,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672644567] [2021-03-10 21:30:39,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:30:39,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:39,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:30:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:30:39,410 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:39,432 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-03-10 21:30:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:30:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 21:30:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:39,434 INFO L225 Difference]: With dead ends: 28 [2021-03-10 21:30:39,434 INFO L226 Difference]: Without dead ends: 23 [2021-03-10 21:30:39,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:30:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-03-10 21:30:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-03-10 21:30:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-03-10 21:30:39,437 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-03-10 21:30:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:39,437 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-03-10 21:30:39,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,438 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-03-10 21:30:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:30:39,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:39,438 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:39,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:30:39,438 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1876900165, now seen corresponding path program 1 times [2021-03-10 21:30:39,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:39,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103523521] [2021-03-10 21:30:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:39,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103523521] [2021-03-10 21:30:39,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616788490] [2021-03-10 21:30:39,635 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 [2021-03-10 21:30:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:30:39,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:39,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:30:39,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:39,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:39,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:39,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-03-10 21:30:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:39,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:39,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:30:39,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017975606] [2021-03-10 21:30:39,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:30:39,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:39,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:30:39,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:30:39,862 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:39,916 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-03-10 21:30:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:30:39,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:30:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:39,919 INFO L225 Difference]: With dead ends: 30 [2021-03-10 21:30:39,919 INFO L226 Difference]: Without dead ends: 22 [2021-03-10 21:30:39,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:30:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-03-10 21:30:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-03-10 21:30:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-03-10 21:30:39,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-03-10 21:30:39,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:39,927 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-03-10 21:30:39,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-03-10 21:30:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:30:39,928 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:39,928 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:40,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 21:30:40,143 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:40,144 INFO L82 PathProgramCache]: Analyzing trace with hash 132986681, now seen corresponding path program 2 times [2021-03-10 21:30:40,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:40,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62157727] [2021-03-10 21:30:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:40,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62157727] [2021-03-10 21:30:40,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863194521] [2021-03-10 21:30:40,249 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) [2021-03-10 21:30:40,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:40,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:40,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:30:40,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:40,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:40,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-03-10 21:30:40,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:40,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:40,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-03-10 21:30:40,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:40,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:30:40,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:40,456 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-03-10 21:30:40,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:40,457 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-03-10 21:30:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:40,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:40,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:30:40,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8597258] [2021-03-10 21:30:40,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:30:40,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:40,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:30:40,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:30:40,504 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:40,565 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-03-10 21:30:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:30:40,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:30:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:40,567 INFO L225 Difference]: With dead ends: 35 [2021-03-10 21:30:40,567 INFO L226 Difference]: Without dead ends: 30 [2021-03-10 21:30:40,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:30:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-03-10 21:30:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-03-10 21:30:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-03-10 21:30:40,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-03-10 21:30:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:40,572 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-03-10 21:30:40,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-03-10 21:30:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:30:40,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:40,573 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:40,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:40,783 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:40,784 INFO L82 PathProgramCache]: Analyzing trace with hash -788714619, now seen corresponding path program 3 times [2021-03-10 21:30:40,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:40,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427453592] [2021-03-10 21:30:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:40,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427453592] [2021-03-10 21:30:40,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642989171] [2021-03-10 21:30:40,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:30:40,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:30:40,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:30:40,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:40,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:40,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-03-10 21:30:40,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:40,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:40,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-03-10 21:30:40,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:30:40,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:30:40,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:41,021 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-03-10 21:30:41,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:41,022 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-03-10 21:30:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:41,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:41,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:30:41,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138561186] [2021-03-10 21:30:41,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:30:41,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:30:41,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:30:41,055 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:41,146 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-03-10 21:30:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:30:41,146 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:30:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:41,147 INFO L225 Difference]: With dead ends: 51 [2021-03-10 21:30:41,147 INFO L226 Difference]: Without dead ends: 41 [2021-03-10 21:30:41,147 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:30:41,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-03-10 21:30:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-03-10 21:30:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-03-10 21:30:41,150 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-03-10 21:30:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:41,151 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-03-10 21:30:41,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-03-10 21:30:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:30:41,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:41,151 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:41,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 21:30:41,355 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:41,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:41,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1870228548, now seen corresponding path program 1 times [2021-03-10 21:30:41,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:41,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252394483] [2021-03-10 21:30:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:41,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252394483] [2021-03-10 21:30:41,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:30:41,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:30:41,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994486277] [2021-03-10 21:30:41,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:30:41,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:41,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:30:41,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:30:41,380 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:41,391 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-03-10 21:30:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:30:41,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:30:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:41,393 INFO L225 Difference]: With dead ends: 29 [2021-03-10 21:30:41,393 INFO L226 Difference]: Without dead ends: 29 [2021-03-10 21:30:41,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:30:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-03-10 21:30:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-03-10 21:30:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-03-10 21:30:41,395 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-03-10 21:30:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:41,396 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-03-10 21:30:41,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-03-10 21:30:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:30:41,396 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:41,396 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:41,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-10 21:30:41,396 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1515210487, now seen corresponding path program 4 times [2021-03-10 21:30:41,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:41,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689287347] [2021-03-10 21:30:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:41,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689287347] [2021-03-10 21:30:41,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763591411] [2021-03-10 21:30:41,499 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 [2021-03-10 21:30:41,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:41,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:41,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:30:41,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:41,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:30:41,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:41,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:41,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:41,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-03-10 21:30:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:41,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:41,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 21:30:41,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454037073] [2021-03-10 21:30:41,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:30:41,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:41,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:30:41,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:30:41,628 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:41,682 INFO L93 Difference]: Finished difference Result 37 states and 65 transitions. [2021-03-10 21:30:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:30:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:30:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:41,682 INFO L225 Difference]: With dead ends: 37 [2021-03-10 21:30:41,682 INFO L226 Difference]: Without dead ends: 29 [2021-03-10 21:30:41,682 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:30:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-03-10 21:30:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-03-10 21:30:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 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) [2021-03-10 21:30:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-03-10 21:30:41,684 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-03-10 21:30:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:41,685 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-03-10 21:30:41,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-03-10 21:30:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:30:41,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:41,685 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:41,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:41,899 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:41,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:41,900 INFO L82 PathProgramCache]: Analyzing trace with hash -228702997, now seen corresponding path program 5 times [2021-03-10 21:30:41,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:41,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398409344] [2021-03-10 21:30:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:42,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398409344] [2021-03-10 21:30:42,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893832240] [2021-03-10 21:30:42,010 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 [2021-03-10 21:30:42,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:42,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:42,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:30:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:42,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:42,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-03-10 21:30:42,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:42,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:42,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:30:42,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:42,149 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:30:42,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:42,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-03-10 21:30:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:42,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:42,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 21:30:42,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722588185] [2021-03-10 21:30:42,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:30:42,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:42,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:30:42,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:30:42,182 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:42,269 INFO L93 Difference]: Finished difference Result 40 states and 76 transitions. [2021-03-10 21:30:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:30:42,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:30:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:42,270 INFO L225 Difference]: With dead ends: 40 [2021-03-10 21:30:42,270 INFO L226 Difference]: Without dead ends: 35 [2021-03-10 21:30:42,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:30:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-03-10 21:30:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-03-10 21:30:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 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) [2021-03-10 21:30:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-03-10 21:30:42,273 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-03-10 21:30:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:42,273 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-03-10 21:30:42,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-03-10 21:30:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:30:42,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:42,274 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:42,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 21:30:42,479 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:42,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:42,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1150404297, now seen corresponding path program 6 times [2021-03-10 21:30:42,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:42,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727816429] [2021-03-10 21:30:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:42,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727816429] [2021-03-10 21:30:42,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011880336] [2021-03-10 21:30:42,552 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 [2021-03-10 21:30:42,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:30:42,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:30:42,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:42,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:42,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-03-10 21:30:42,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:42,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:42,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:30:42,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:42,686 INFO L628 ElimStorePlain]: treesize reduction 23, result has 43.9 percent of original size [2021-03-10 21:30:42,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:42,687 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-03-10 21:30:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:42,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:42,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 21:30:42,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855124654] [2021-03-10 21:30:42,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:30:42,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:42,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:30:42,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:30:42,717 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:42,838 INFO L93 Difference]: Finished difference Result 61 states and 110 transitions. [2021-03-10 21:30:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:30:42,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:30:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:42,839 INFO L225 Difference]: With dead ends: 61 [2021-03-10 21:30:42,839 INFO L226 Difference]: Without dead ends: 51 [2021-03-10 21:30:42,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:30:42,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-03-10 21:30:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-03-10 21:30:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 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) [2021-03-10 21:30:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-03-10 21:30:42,850 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-03-10 21:30:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:42,850 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-03-10 21:30:42,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-03-10 21:30:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:30:42,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:42,850 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:43,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:43,066 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:43,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1508538870, now seen corresponding path program 1 times [2021-03-10 21:30:43,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:43,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995874446] [2021-03-10 21:30:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:43,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995874446] [2021-03-10 21:30:43,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421722928] [2021-03-10 21:30:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-03-10 21:30:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:43,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:30:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:43,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:43,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:30:43,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756024924] [2021-03-10 21:30:43,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:30:43,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:43,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:30:43,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:30:43,130 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:43,151 INFO L93 Difference]: Finished difference Result 59 states and 102 transitions. [2021-03-10 21:30:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:30:43,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:30:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:43,153 INFO L225 Difference]: With dead ends: 59 [2021-03-10 21:30:43,153 INFO L226 Difference]: Without dead ends: 59 [2021-03-10 21:30:43,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:30:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-03-10 21:30:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-03-10 21:30:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-03-10 21:30:43,155 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 12 [2021-03-10 21:30:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:43,155 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-03-10 21:30:43,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-03-10 21:30:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:30:43,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:43,156 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:43,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:43,367 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash -549695156, now seen corresponding path program 2 times [2021-03-10 21:30:43,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:43,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927268457] [2021-03-10 21:30:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:43,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927268457] [2021-03-10 21:30:43,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337753857] [2021-03-10 21:30:43,381 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 [2021-03-10 21:30:43,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:43,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:43,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:30:43,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:43,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:43,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:30:43,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960231974] [2021-03-10 21:30:43,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:30:43,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:43,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:30:43,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:30:43,421 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:43,449 INFO L93 Difference]: Finished difference Result 43 states and 82 transitions. [2021-03-10 21:30:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:30:43,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:30:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:43,450 INFO L225 Difference]: With dead ends: 43 [2021-03-10 21:30:43,450 INFO L226 Difference]: Without dead ends: 43 [2021-03-10 21:30:43,450 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:43,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-03-10 21:30:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-03-10 21:30:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-03-10 21:30:43,451 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 12 [2021-03-10 21:30:43,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:43,452 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-03-10 21:30:43,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-03-10 21:30:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:30:43,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:43,452 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:43,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 21:30:43,653 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:43,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1107234939, now seen corresponding path program 7 times [2021-03-10 21:30:43,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:43,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446343144] [2021-03-10 21:30:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:43,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446343144] [2021-03-10 21:30:43,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862118343] [2021-03-10 21:30:43,724 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:30:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:43,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:30:43,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:43,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:43,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:30:43,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:43,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:43,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:43,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:30:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:43,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:43,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 21:30:43,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002239874] [2021-03-10 21:30:43,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:30:43,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:43,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:30:43,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:30:43,893 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:43,956 INFO L93 Difference]: Finished difference Result 44 states and 87 transitions. [2021-03-10 21:30:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:30:43,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:30:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:43,957 INFO L225 Difference]: With dead ends: 44 [2021-03-10 21:30:43,957 INFO L226 Difference]: Without dead ends: 39 [2021-03-10 21:30:43,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:30:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-03-10 21:30:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-03-10 21:30:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-03-10 21:30:43,959 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-03-10 21:30:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:43,959 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-03-10 21:30:43,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-03-10 21:30:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:30:43,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:43,960 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:44,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:44,174 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:44,175 INFO L82 PathProgramCache]: Analyzing trace with hash 522117573, now seen corresponding path program 8 times [2021-03-10 21:30:44,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:44,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043142739] [2021-03-10 21:30:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:44,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043142739] [2021-03-10 21:30:44,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805213817] [2021-03-10 21:30:44,244 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:30:44,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:44,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:44,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:30:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:44,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:44,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:30:44,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:44,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:44,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:44,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:30:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:44,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:44,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 21:30:44,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820001196] [2021-03-10 21:30:44,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:30:44,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:44,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:30:44,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:30:44,377 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:44,463 INFO L93 Difference]: Finished difference Result 55 states and 100 transitions. [2021-03-10 21:30:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:30:44,464 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:30:44,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:44,465 INFO L225 Difference]: With dead ends: 55 [2021-03-10 21:30:44,465 INFO L226 Difference]: Without dead ends: 50 [2021-03-10 21:30:44,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:30:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-03-10 21:30:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-03-10 21:30:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-03-10 21:30:44,469 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-03-10 21:30:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:44,469 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-03-10 21:30:44,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-03-10 21:30:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:30:44,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:44,470 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:44,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:44,681 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:44,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1113906556, now seen corresponding path program 3 times [2021-03-10 21:30:44,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:44,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948902867] [2021-03-10 21:30:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:44,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948902867] [2021-03-10 21:30:44,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720837396] [2021-03-10 21:30:44,703 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 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 [2021-03-10 21:30:44,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:30:44,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:44,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:30:44,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:44,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:44,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:30:44,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595902897] [2021-03-10 21:30:44,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:30:44,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:44,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:30:44,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:30:44,766 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:44,792 INFO L93 Difference]: Finished difference Result 85 states and 153 transitions. [2021-03-10 21:30:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:30:44,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:30:44,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:44,792 INFO L225 Difference]: With dead ends: 85 [2021-03-10 21:30:44,792 INFO L226 Difference]: Without dead ends: 85 [2021-03-10 21:30:44,793 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-03-10 21:30:44,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2021-03-10 21:30:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-03-10 21:30:44,803 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-03-10 21:30:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:44,803 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-03-10 21:30:44,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-03-10 21:30:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:30:44,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:44,806 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:45,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 21:30:45,015 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1122826714, now seen corresponding path program 4 times [2021-03-10 21:30:45,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:45,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023357403] [2021-03-10 21:30:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:45,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023357403] [2021-03-10 21:30:45,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228304118] [2021-03-10 21:30:45,041 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) [2021-03-10 21:30:45,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:45,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:30:45,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:45,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:45,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:30:45,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448117932] [2021-03-10 21:30:45,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:30:45,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:45,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:30:45,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:30:45,094 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:45,134 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-03-10 21:30:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:30:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:30:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:45,134 INFO L225 Difference]: With dead ends: 65 [2021-03-10 21:30:45,134 INFO L226 Difference]: Without dead ends: 65 [2021-03-10 21:30:45,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:30:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-03-10 21:30:45,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-03-10 21:30:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-03-10 21:30:45,138 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-03-10 21:30:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:45,138 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-03-10 21:30:45,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-03-10 21:30:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:30:45,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:45,138 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:45,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:45,351 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1022462021, now seen corresponding path program 9 times [2021-03-10 21:30:45,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:45,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719000059] [2021-03-10 21:30:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:45,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719000059] [2021-03-10 21:30:45,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689807286] [2021-03-10 21:30:45,408 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 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 [2021-03-10 21:30:45,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:30:45,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:45,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:30:45,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:45,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:45,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:30:45,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:45,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:45,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:45,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:30:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:45,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:45,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 21:30:45,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137150054] [2021-03-10 21:30:45,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:30:45,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:45,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:30:45,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:30:45,539 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:45,643 INFO L93 Difference]: Finished difference Result 78 states and 134 transitions. [2021-03-10 21:30:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:30:45,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:30:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:45,644 INFO L225 Difference]: With dead ends: 78 [2021-03-10 21:30:45,644 INFO L226 Difference]: Without dead ends: 73 [2021-03-10 21:30:45,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:30:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-03-10 21:30:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-03-10 21:30:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2021-03-10 21:30:45,647 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 13 [2021-03-10 21:30:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:45,647 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2021-03-10 21:30:45,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2021-03-10 21:30:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:30:45,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:45,648 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:45,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 21:30:45,859 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1742081348, now seen corresponding path program 5 times [2021-03-10 21:30:45,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:45,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614091546] [2021-03-10 21:30:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:45,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614091546] [2021-03-10 21:30:45,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358067947] [2021-03-10 21:30:45,882 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 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 [2021-03-10 21:30:45,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:30:45,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:45,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:30:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:45,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:45,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:30:45,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272710559] [2021-03-10 21:30:45,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:30:45,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:45,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:30:45,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:30:45,940 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:45,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:45,982 INFO L93 Difference]: Finished difference Result 65 states and 130 transitions. [2021-03-10 21:30:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:30:45,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:30:45,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:45,983 INFO L225 Difference]: With dead ends: 65 [2021-03-10 21:30:45,983 INFO L226 Difference]: Without dead ends: 65 [2021-03-10 21:30:45,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:30:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-03-10 21:30:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-03-10 21:30:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 91 transitions. [2021-03-10 21:30:45,984 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 91 transitions. Word has length 13 [2021-03-10 21:30:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:45,984 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 91 transitions. [2021-03-10 21:30:45,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 91 transitions. [2021-03-10 21:30:45,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:30:45,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:45,989 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:46,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:46,195 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:46,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:46,196 INFO L82 PathProgramCache]: Analyzing trace with hash -798664521, now seen corresponding path program 10 times [2021-03-10 21:30:46,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:46,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560774696] [2021-03-10 21:30:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:46,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560774696] [2021-03-10 21:30:46,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502582983] [2021-03-10 21:30:46,225 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 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 [2021-03-10 21:30:46,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:46,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:30:46,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:46,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:46,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:30:46,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748536206] [2021-03-10 21:30:46,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:30:46,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:46,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:30:46,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:46,291 INFO L87 Difference]: Start difference. First operand 43 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:46,334 INFO L93 Difference]: Finished difference Result 84 states and 148 transitions. [2021-03-10 21:30:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:30:46,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:30:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:46,335 INFO L225 Difference]: With dead ends: 84 [2021-03-10 21:30:46,335 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 21:30:46,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:30:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 21:30:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2021-03-10 21:30:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 93 transitions. [2021-03-10 21:30:46,337 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 93 transitions. Word has length 14 [2021-03-10 21:30:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:46,337 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 93 transitions. [2021-03-10 21:30:46,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 93 transitions. [2021-03-10 21:30:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:30:46,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:46,337 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:46,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:46,549 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:46,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:46,549 INFO L82 PathProgramCache]: Analyzing trace with hash 861067660, now seen corresponding path program 6 times [2021-03-10 21:30:46,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:46,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558489293] [2021-03-10 21:30:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:46,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558489293] [2021-03-10 21:30:46,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964907873] [2021-03-10 21:30:46,581 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 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 [2021-03-10 21:30:46,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:30:46,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:46,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:30:46,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:46,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:46,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:30:46,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361048946] [2021-03-10 21:30:46,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:30:46,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:46,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:30:46,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:46,648 INFO L87 Difference]: Start difference. First operand 43 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:46,710 INFO L93 Difference]: Finished difference Result 106 states and 189 transitions. [2021-03-10 21:30:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:30:46,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:30:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:46,711 INFO L225 Difference]: With dead ends: 106 [2021-03-10 21:30:46,711 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 21:30:46,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:30:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 21:30:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2021-03-10 21:30:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 110 transitions. [2021-03-10 21:30:46,715 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 110 transitions. Word has length 14 [2021-03-10 21:30:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:46,715 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 110 transitions. [2021-03-10 21:30:46,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 110 transitions. [2021-03-10 21:30:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:30:46,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:46,715 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:46,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:46,927 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:46,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:46,927 INFO L82 PathProgramCache]: Analyzing trace with hash 830687991, now seen corresponding path program 11 times [2021-03-10 21:30:46,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:46,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706258141] [2021-03-10 21:30:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:46,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706258141] [2021-03-10 21:30:46,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101407323] [2021-03-10 21:30:46,953 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:30:46,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:30:46,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:46,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:30:46,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:47,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:47,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:30:47,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392129363] [2021-03-10 21:30:47,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:30:47,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:47,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:30:47,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:47,001 INFO L87 Difference]: Start difference. First operand 49 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:47,045 INFO L93 Difference]: Finished difference Result 60 states and 123 transitions. [2021-03-10 21:30:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:30:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:30:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:47,046 INFO L225 Difference]: With dead ends: 60 [2021-03-10 21:30:47,046 INFO L226 Difference]: Without dead ends: 58 [2021-03-10 21:30:47,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:30:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-03-10 21:30:47,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-03-10 21:30:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 109 transitions. [2021-03-10 21:30:47,048 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 109 transitions. Word has length 14 [2021-03-10 21:30:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:47,048 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 109 transitions. [2021-03-10 21:30:47,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 109 transitions. [2021-03-10 21:30:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:30:47,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:47,048 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:47,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-03-10 21:30:47,255 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:47,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash -805336138, now seen corresponding path program 7 times [2021-03-10 21:30:47,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:47,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218443677] [2021-03-10 21:30:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:47,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218443677] [2021-03-10 21:30:47,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017892597] [2021-03-10 21:30:47,287 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 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 [2021-03-10 21:30:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:47,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:30:47,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:47,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:47,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:30:47,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103924542] [2021-03-10 21:30:47,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:30:47,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:30:47,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:47,348 INFO L87 Difference]: Start difference. First operand 49 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:47,388 INFO L93 Difference]: Finished difference Result 94 states and 171 transitions. [2021-03-10 21:30:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:30:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:30:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:47,388 INFO L225 Difference]: With dead ends: 94 [2021-03-10 21:30:47,388 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 21:30:47,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:30:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 21:30:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 46. [2021-03-10 21:30:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 97 transitions. [2021-03-10 21:30:47,390 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 97 transitions. Word has length 14 [2021-03-10 21:30:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:47,390 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 97 transitions. [2021-03-10 21:30:47,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 97 transitions. [2021-03-10 21:30:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:30:47,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:47,391 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:47,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 21:30:47,599 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:47,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:47,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1972248533, now seen corresponding path program 12 times [2021-03-10 21:30:47,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:47,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56329182] [2021-03-10 21:30:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:47,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56329182] [2021-03-10 21:30:47,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385835451] [2021-03-10 21:30:47,619 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 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 [2021-03-10 21:30:47,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:30:47,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:47,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:30:47,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:47,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:47,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:30:47,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507754152] [2021-03-10 21:30:47,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:30:47,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:47,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:30:47,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:47,663 INFO L87 Difference]: Start difference. First operand 46 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:47,705 INFO L93 Difference]: Finished difference Result 59 states and 113 transitions. [2021-03-10 21:30:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:30:47,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:30:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:47,705 INFO L225 Difference]: With dead ends: 59 [2021-03-10 21:30:47,705 INFO L226 Difference]: Without dead ends: 55 [2021-03-10 21:30:47,705 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:30:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-03-10 21:30:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-03-10 21:30:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2021-03-10 21:30:47,707 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 14 [2021-03-10 21:30:47,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:47,708 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2021-03-10 21:30:47,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2021-03-10 21:30:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:30:47,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:47,708 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:47,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 21:30:47,919 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:47,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1431397132, now seen corresponding path program 8 times [2021-03-10 21:30:47,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:47,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482898582] [2021-03-10 21:30:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:47,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482898582] [2021-03-10 21:30:47,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996190582] [2021-03-10 21:30:47,945 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:30:47,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:47,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:47,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:30:47,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:48,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:48,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:30:48,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612946542] [2021-03-10 21:30:48,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:30:48,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:48,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:30:48,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:48,009 INFO L87 Difference]: Start difference. First operand 46 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:48,052 INFO L93 Difference]: Finished difference Result 91 states and 166 transitions. [2021-03-10 21:30:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:30:48,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:30:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:48,053 INFO L225 Difference]: With dead ends: 91 [2021-03-10 21:30:48,053 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 21:30:48,053 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:30:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 21:30:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2021-03-10 21:30:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 46 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2021-03-10 21:30:48,055 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 14 [2021-03-10 21:30:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:48,055 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2021-03-10 21:30:48,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2021-03-10 21:30:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:30:48,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:48,055 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:48,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 21:30:48,263 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1331032439, now seen corresponding path program 13 times [2021-03-10 21:30:48,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:48,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385175036] [2021-03-10 21:30:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:48,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385175036] [2021-03-10 21:30:48,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938171017] [2021-03-10 21:30:48,287 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 [2021-03-10 21:30:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:48,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:30:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:48,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:48,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:30:48,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878340113] [2021-03-10 21:30:48,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:30:48,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:48,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:30:48,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:48,340 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:48,371 INFO L93 Difference]: Finished difference Result 62 states and 119 transitions. [2021-03-10 21:30:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:30:48,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:30:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:48,372 INFO L225 Difference]: With dead ends: 62 [2021-03-10 21:30:48,372 INFO L226 Difference]: Without dead ends: 56 [2021-03-10 21:30:48,372 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:30:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-03-10 21:30:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-03-10 21:30:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-03-10 21:30:48,373 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-03-10 21:30:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:48,373 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-03-10 21:30:48,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-03-10 21:30:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:30:48,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:48,374 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:48,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 21:30:48,583 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:48,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:48,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2050651766, now seen corresponding path program 9 times [2021-03-10 21:30:48,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:48,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296888118] [2021-03-10 21:30:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:48,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296888118] [2021-03-10 21:30:48,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259423372] [2021-03-10 21:30:48,606 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 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 [2021-03-10 21:30:48,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:30:48,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:48,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:30:48,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:48,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:48,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:30:48,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113616300] [2021-03-10 21:30:48,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:30:48,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:48,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:30:48,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:48,663 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:48,716 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2021-03-10 21:30:48,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:30:48,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:30:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:48,716 INFO L225 Difference]: With dead ends: 88 [2021-03-10 21:30:48,716 INFO L226 Difference]: Without dead ends: 88 [2021-03-10 21:30:48,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:30:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-10 21:30:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-03-10 21:30:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-03-10 21:30:48,718 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-03-10 21:30:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:48,718 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-03-10 21:30:48,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-03-10 21:30:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:30:48,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:48,718 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:48,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:48,919 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 653527467, now seen corresponding path program 14 times [2021-03-10 21:30:48,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:48,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368130377] [2021-03-10 21:30:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:48,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368130377] [2021-03-10 21:30:48,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:30:48,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:30:48,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419842289] [2021-03-10 21:30:48,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:30:48,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:48,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:30:48,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:30:48,943 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:48,958 INFO L93 Difference]: Finished difference Result 53 states and 106 transitions. [2021-03-10 21:30:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:30:48,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:30:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:48,959 INFO L225 Difference]: With dead ends: 53 [2021-03-10 21:30:48,959 INFO L226 Difference]: Without dead ends: 45 [2021-03-10 21:30:48,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:30:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-03-10 21:30:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-03-10 21:30:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 95 transitions. [2021-03-10 21:30:48,965 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 95 transitions. Word has length 14 [2021-03-10 21:30:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:48,965 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 95 transitions. [2021-03-10 21:30:48,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 95 transitions. [2021-03-10 21:30:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:30:48,966 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:48,966 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:48,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-03-10 21:30:48,966 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:48,967 INFO L82 PathProgramCache]: Analyzing trace with hash -227291060, now seen corresponding path program 10 times [2021-03-10 21:30:48,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:48,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225702248] [2021-03-10 21:30:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:48,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225702248] [2021-03-10 21:30:48,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493267130] [2021-03-10 21:30:48,990 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 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 [2021-03-10 21:30:49,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:49,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:49,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:30:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:49,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:49,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:30:49,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460898132] [2021-03-10 21:30:49,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:30:49,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:49,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:30:49,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:30:49,028 INFO L87 Difference]: Start difference. First operand 45 states and 95 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-03-10 21:30:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:49,083 INFO L93 Difference]: Finished difference Result 91 states and 185 transitions. [2021-03-10 21:30:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:30:49,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 14 [2021-03-10 21:30:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:49,084 INFO L225 Difference]: With dead ends: 91 [2021-03-10 21:30:49,084 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 21:30:49,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:30:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 21:30:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-03-10 21:30:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 110 transitions. [2021-03-10 21:30:49,086 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 110 transitions. Word has length 14 [2021-03-10 21:30:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:49,086 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 110 transitions. [2021-03-10 21:30:49,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-03-10 21:30:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 110 transitions. [2021-03-10 21:30:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:49,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:49,086 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:49,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:49,295 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:49,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1836816026, now seen corresponding path program 11 times [2021-03-10 21:30:49,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:49,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214785717] [2021-03-10 21:30:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:49,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214785717] [2021-03-10 21:30:49,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461182422] [2021-03-10 21:30:49,354 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 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 [2021-03-10 21:30:49,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:30:49,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:49,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:30:49,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:49,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:49,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:49,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:49,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:49,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:49,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:3 [2021-03-10 21:30:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:49,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:49,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:49,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463381652] [2021-03-10 21:30:49,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:49,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:49,579 INFO L87 Difference]: Start difference. First operand 51 states and 110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:49,673 INFO L93 Difference]: Finished difference Result 66 states and 137 transitions. [2021-03-10 21:30:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:30:49,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:49,673 INFO L225 Difference]: With dead ends: 66 [2021-03-10 21:30:49,673 INFO L226 Difference]: Without dead ends: 56 [2021-03-10 21:30:49,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:30:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-03-10 21:30:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-03-10 21:30:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 114 transitions. [2021-03-10 21:30:49,676 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 114 transitions. Word has length 15 [2021-03-10 21:30:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:49,676 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 114 transitions. [2021-03-10 21:30:49,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 114 transitions. [2021-03-10 21:30:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:49,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:49,676 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:49,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:49,891 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:49,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash 170412228, now seen corresponding path program 12 times [2021-03-10 21:30:49,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:49,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010984534] [2021-03-10 21:30:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:49,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010984534] [2021-03-10 21:30:49,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543757432] [2021-03-10 21:30:49,955 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 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 [2021-03-10 21:30:49,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:30:49,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:49,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:50,243 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 2061 DAG size of output: 48 [2021-03-10 21:30:50,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:50,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:50,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:50,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:50,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:50,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:30:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:50,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:50,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:50,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798595107] [2021-03-10 21:30:50,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:50,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:50,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:50,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:50,300 INFO L87 Difference]: Start difference. First operand 53 states and 114 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:50,459 INFO L93 Difference]: Finished difference Result 83 states and 179 transitions. [2021-03-10 21:30:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:30:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:50,460 INFO L225 Difference]: With dead ends: 83 [2021-03-10 21:30:50,460 INFO L226 Difference]: Without dead ends: 69 [2021-03-10 21:30:50,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:30:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-03-10 21:30:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-03-10 21:30:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-03-10 21:30:50,463 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-03-10 21:30:50,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:50,463 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-03-10 21:30:50,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:50,463 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-03-10 21:30:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:50,463 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:50,463 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:50,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-10 21:30:50,678 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:50,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:50,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1029286758, now seen corresponding path program 13 times [2021-03-10 21:30:50,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:50,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149121249] [2021-03-10 21:30:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:50,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149121249] [2021-03-10 21:30:50,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664160668] [2021-03-10 21:30:50,730 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 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 [2021-03-10 21:30:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:50,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:50,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:50,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:50,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:30:50,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:50,969 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:50,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:50,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:50,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:50,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:50,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:51,014 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:51,026 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:30:51,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:51,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:30:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:51,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:51,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:51,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942958930] [2021-03-10 21:30:51,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:51,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:51,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:51,052 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:51,231 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-03-10 21:30:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:30:51,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:51,235 INFO L225 Difference]: With dead ends: 102 [2021-03-10 21:30:51,235 INFO L226 Difference]: Without dead ends: 92 [2021-03-10 21:30:51,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:30:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-10 21:30:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2021-03-10 21:30:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-03-10 21:30:51,237 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-03-10 21:30:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:51,237 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-03-10 21:30:51,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-03-10 21:30:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:51,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:51,237 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:51,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 21:30:51,438 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:51,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:51,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1887821798, now seen corresponding path program 14 times [2021-03-10 21:30:51,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:51,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987323727] [2021-03-10 21:30:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:51,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987323727] [2021-03-10 21:30:51,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308188881] [2021-03-10 21:30:51,496 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 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 [2021-03-10 21:30:51,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:51,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:51,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:51,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:51,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:51,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:51,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:51,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:51,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:51,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:30:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:51,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:51,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:51,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022098002] [2021-03-10 21:30:51,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:51,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:51,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:51,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:51,670 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:51,843 INFO L93 Difference]: Finished difference Result 93 states and 210 transitions. [2021-03-10 21:30:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:30:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:51,844 INFO L225 Difference]: With dead ends: 93 [2021-03-10 21:30:51,844 INFO L226 Difference]: Without dead ends: 79 [2021-03-10 21:30:51,845 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:30:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-03-10 21:30:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-03-10 21:30:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.515151515151515) internal successors, (166), 66 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2021-03-10 21:30:51,846 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 15 [2021-03-10 21:30:51,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:51,847 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2021-03-10 21:30:51,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:51,847 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2021-03-10 21:30:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:51,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:51,847 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:52,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:52,047 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:52,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1028947268, now seen corresponding path program 15 times [2021-03-10 21:30:52,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:52,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576245667] [2021-03-10 21:30:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:52,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576245667] [2021-03-10 21:30:52,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149395488] [2021-03-10 21:30:52,114 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 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 [2021-03-10 21:30:52,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:30:52,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:52,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:52,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:52,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:30:52,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:52,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:52,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:52,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:52,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:52,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:52,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:52,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:52,367 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:30:52,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:52,368 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:30:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:52,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:52,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:52,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435222819] [2021-03-10 21:30:52,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:52,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:52,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:52,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:52,403 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:52,628 INFO L93 Difference]: Finished difference Result 119 states and 261 transitions. [2021-03-10 21:30:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:30:52,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:52,629 INFO L225 Difference]: With dead ends: 119 [2021-03-10 21:30:52,629 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 21:30:52,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 21:30:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2021-03-10 21:30:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-03-10 21:30:52,631 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-03-10 21:30:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:52,631 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-03-10 21:30:52,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-03-10 21:30:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:52,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:52,632 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:52,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:52,843 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:52,843 INFO L82 PathProgramCache]: Analyzing trace with hash 681666040, now seen corresponding path program 16 times [2021-03-10 21:30:52,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:52,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526754321] [2021-03-10 21:30:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:52,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526754321] [2021-03-10 21:30:52,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802445417] [2021-03-10 21:30:52,897 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 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 [2021-03-10 21:30:52,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:52,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:52,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:53,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:53,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:30:53,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:53,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:53,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:53,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:53,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:53,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:53,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:53,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:53,147 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:30:53,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:53,148 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:30:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:53,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:53,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:53,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309042580] [2021-03-10 21:30:53,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:53,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:53,179 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:53,375 INFO L93 Difference]: Finished difference Result 98 states and 230 transitions. [2021-03-10 21:30:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:30:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:53,376 INFO L225 Difference]: With dead ends: 98 [2021-03-10 21:30:53,376 INFO L226 Difference]: Without dead ends: 93 [2021-03-10 21:30:53,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-03-10 21:30:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2021-03-10 21:30:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-03-10 21:30:53,378 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-03-10 21:30:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:53,378 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-03-10 21:30:53,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:53,378 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-03-10 21:30:53,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:53,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:53,378 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:53,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:53,579 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1268567164, now seen corresponding path program 17 times [2021-03-10 21:30:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:53,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780195458] [2021-03-10 21:30:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:53,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780195458] [2021-03-10 21:30:53,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590004088] [2021-03-10 21:30:53,633 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 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 [2021-03-10 21:30:53,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:30:53,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:53,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:53,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:53,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:53,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:53,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:53,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:53,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:30:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:53,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:53,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:53,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576143353] [2021-03-10 21:30:53,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:53,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:53,845 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:54,001 INFO L93 Difference]: Finished difference Result 100 states and 238 transitions. [2021-03-10 21:30:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:30:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:54,002 INFO L225 Difference]: With dead ends: 100 [2021-03-10 21:30:54,002 INFO L226 Difference]: Without dead ends: 86 [2021-03-10 21:30:54,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:30:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-03-10 21:30:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-03-10 21:30:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-03-10 21:30:54,004 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-03-10 21:30:54,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:54,004 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-03-10 21:30:54,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-03-10 21:30:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:54,004 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:54,004 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:54,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:54,219 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash -409692634, now seen corresponding path program 18 times [2021-03-10 21:30:54,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:54,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730139627] [2021-03-10 21:30:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:54,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730139627] [2021-03-10 21:30:54,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777157297] [2021-03-10 21:30:54,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:30:54,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:30:54,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:54,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:54,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:54,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:54,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:30:54,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:54,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:54,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:54,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:54,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:54,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:54,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:54,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:54,613 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:30:54,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:54,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:30:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:54,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:54,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192521665] [2021-03-10 21:30:54,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:54,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:54,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:54,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:54,637 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:54,854 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2021-03-10 21:30:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:30:54,854 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:54,855 INFO L225 Difference]: With dead ends: 120 [2021-03-10 21:30:54,855 INFO L226 Difference]: Without dead ends: 110 [2021-03-10 21:30:54,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-03-10 21:30:54,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-03-10 21:30:54,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-03-10 21:30:54,857 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-03-10 21:30:54,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:54,857 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-03-10 21:30:54,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-03-10 21:30:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:54,857 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:54,857 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:55,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:55,058 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:55,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1300920674, now seen corresponding path program 19 times [2021-03-10 21:30:55,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:55,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145448895] [2021-03-10 21:30:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:55,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145448895] [2021-03-10 21:30:55,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692206412] [2021-03-10 21:30:55,110 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 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 [2021-03-10 21:30:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:55,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:55,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:55,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:55,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:30:55,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:55,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:55,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:55,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:55,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:55,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:55,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:55,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:55,373 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:30:55,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:55,373 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:30:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:55,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:55,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:55,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706561524] [2021-03-10 21:30:55,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:55,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:55,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:55,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:55,393 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:55,600 INFO L93 Difference]: Finished difference Result 104 states and 252 transitions. [2021-03-10 21:30:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:30:55,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:55,601 INFO L225 Difference]: With dead ends: 104 [2021-03-10 21:30:55,601 INFO L226 Difference]: Without dead ends: 99 [2021-03-10 21:30:55,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-03-10 21:30:55,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2021-03-10 21:30:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-03-10 21:30:55,602 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-03-10 21:30:55,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:55,603 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-03-10 21:30:55,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:55,603 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-03-10 21:30:55,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:55,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:55,603 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:55,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2021-03-10 21:30:55,818 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:55,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:55,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1504641626, now seen corresponding path program 20 times [2021-03-10 21:30:55,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:55,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49426606] [2021-03-10 21:30:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49426606] [2021-03-10 21:30:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187218733] [2021-03-10 21:30:55,873 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 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 [2021-03-10 21:30:55,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:55,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:55,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:56,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:56,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:30:56,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:56,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:56,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:56,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:56,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:56,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:56,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:56,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:56,131 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:30:56,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:56,132 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:30:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:56,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:56,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:56,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816115639] [2021-03-10 21:30:56,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:56,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:56,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:56,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:56,165 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:56,386 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2021-03-10 21:30:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:30:56,386 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:56,386 INFO L225 Difference]: With dead ends: 121 [2021-03-10 21:30:56,386 INFO L226 Difference]: Without dead ends: 116 [2021-03-10 21:30:56,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-10 21:30:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2021-03-10 21:30:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-03-10 21:30:56,388 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-03-10 21:30:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:56,389 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-03-10 21:30:56,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-03-10 21:30:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:56,389 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:56,389 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:56,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:56,593 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:56,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:56,593 INFO L82 PathProgramCache]: Analyzing trace with hash 748457306, now seen corresponding path program 21 times [2021-03-10 21:30:56,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:56,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551621920] [2021-03-10 21:30:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:56,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551621920] [2021-03-10 21:30:56,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351219307] [2021-03-10 21:30:56,652 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 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 [2021-03-10 21:30:56,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:30:56,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:56,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:56,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:56,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:56,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:56,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:56,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:30:56,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:30:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:56,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:56,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:56,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853756078] [2021-03-10 21:30:56,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:56,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:56,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:56,839 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:56,987 INFO L93 Difference]: Finished difference Result 107 states and 266 transitions. [2021-03-10 21:30:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:30:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:56,988 INFO L225 Difference]: With dead ends: 107 [2021-03-10 21:30:56,988 INFO L226 Difference]: Without dead ends: 93 [2021-03-10 21:30:56,988 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:30:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-03-10 21:30:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-03-10 21:30:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-03-10 21:30:56,990 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-03-10 21:30:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:56,990 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-03-10 21:30:56,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-03-10 21:30:56,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:56,991 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:56,991 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:57,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:57,206 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1607331836, now seen corresponding path program 22 times [2021-03-10 21:30:57,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:57,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856069771] [2021-03-10 21:30:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:57,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856069771] [2021-03-10 21:30:57,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672588257] [2021-03-10 21:30:57,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:30:57,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:57,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:57,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:57,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:57,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:57,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:30:57,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:57,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:57,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:57,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:57,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:57,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:57,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:57,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:57,628 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:30:57,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:57,629 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:30:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:57,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:57,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:57,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887931985] [2021-03-10 21:30:57,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:57,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:57,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:57,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:57,651 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:57,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:57,894 INFO L93 Difference]: Finished difference Result 129 states and 314 transitions. [2021-03-10 21:30:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:30:57,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:57,895 INFO L225 Difference]: With dead ends: 129 [2021-03-10 21:30:57,895 INFO L226 Difference]: Without dead ends: 119 [2021-03-10 21:30:57,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:57,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-03-10 21:30:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-03-10 21:30:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-03-10 21:30:57,897 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-03-10 21:30:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:57,897 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-03-10 21:30:57,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-03-10 21:30:57,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:57,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:57,898 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:58,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-03-10 21:30:58,098 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:58,099 INFO L82 PathProgramCache]: Analyzing trace with hash -977022152, now seen corresponding path program 23 times [2021-03-10 21:30:58,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:58,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264909870] [2021-03-10 21:30:58,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:58,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264909870] [2021-03-10 21:30:58,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170987322] [2021-03-10 21:30:58,164 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 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 [2021-03-10 21:30:58,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:30:58,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:58,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:58,814 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 2608 DAG size of output: 46 [2021-03-10 21:30:58,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:58,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:30:58,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:58,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:58,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:58,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:58,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:58,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:58,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:58,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:58,974 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:30:58,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:58,975 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:30:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:58,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:58,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:58,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84657218] [2021-03-10 21:30:58,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:58,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:58,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:58,999 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:59,190 INFO L93 Difference]: Finished difference Result 111 states and 280 transitions. [2021-03-10 21:30:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:30:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:59,191 INFO L225 Difference]: With dead ends: 111 [2021-03-10 21:30:59,191 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 21:30:59,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 21:30:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-03-10 21:30:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-03-10 21:30:59,193 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-03-10 21:30:59,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:59,193 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-03-10 21:30:59,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-03-10 21:30:59,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:59,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:59,194 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:59,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:59,394 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash 512382844, now seen corresponding path program 24 times [2021-03-10 21:30:59,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:59,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18962245] [2021-03-10 21:30:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:59,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18962245] [2021-03-10 21:30:59,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922668478] [2021-03-10 21:30:59,451 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 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 [2021-03-10 21:30:59,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:30:59,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:30:59,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:59,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:59,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:30:59,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:30:59,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:59,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:59,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:30:59,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:59,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:30:59,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:30:59,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:30:59,721 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:30:59,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:30:59,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:30:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:59,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:59,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:30:59,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761722803] [2021-03-10 21:30:59,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:59,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:59,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:59,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:59,746 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:59,990 INFO L93 Difference]: Finished difference Result 125 states and 307 transitions. [2021-03-10 21:30:59,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:30:59,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:30:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:59,991 INFO L225 Difference]: With dead ends: 125 [2021-03-10 21:30:59,991 INFO L226 Difference]: Without dead ends: 120 [2021-03-10 21:30:59,991 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:30:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-10 21:30:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2021-03-10 21:30:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-03-10 21:30:59,993 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-03-10 21:30:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:59,993 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-03-10 21:30:59,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-03-10 21:30:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:30:59,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:59,994 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:00,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-03-10 21:31:00,194 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash -560702536, now seen corresponding path program 25 times [2021-03-10 21:31:00,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:00,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586647870] [2021-03-10 21:31:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:00,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586647870] [2021-03-10 21:31:00,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552996924] [2021-03-10 21:31:00,251 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 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 [2021-03-10 21:31:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:31:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:00,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:00,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:31:00,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:00,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:00,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:00,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:00,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:00,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:00,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:31:00,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:00,532 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:31:00,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:00,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:31:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:00,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:00,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:31:00,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017939778] [2021-03-10 21:31:00,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:00,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:00,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:00,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:00,556 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:00,872 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2021-03-10 21:31:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:31:00,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:31:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:00,873 INFO L225 Difference]: With dead ends: 139 [2021-03-10 21:31:00,873 INFO L226 Difference]: Without dead ends: 134 [2021-03-10 21:31:00,873 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:31:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-03-10 21:31:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2021-03-10 21:31:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-03-10 21:31:00,876 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-03-10 21:31:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:00,876 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-03-10 21:31:00,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-03-10 21:31:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:31:00,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:00,876 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:01,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:01,087 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:01,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1148293564, now seen corresponding path program 26 times [2021-03-10 21:31:01,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:01,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218411930] [2021-03-10 21:31:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:01,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218411930] [2021-03-10 21:31:01,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527465798] [2021-03-10 21:31:01,142 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:31:01,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:01,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:01,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:31:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:01,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:01,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:31:01,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:01,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:01,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:01,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:31:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:01,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:01,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:31:01,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773493104] [2021-03-10 21:31:01,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:01,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:01,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:01,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:01,332 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:01,486 INFO L93 Difference]: Finished difference Result 117 states and 300 transitions. [2021-03-10 21:31:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:31:01,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:31:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:01,487 INFO L225 Difference]: With dead ends: 117 [2021-03-10 21:31:01,487 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 21:31:01,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:31:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 21:31:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-03-10 21:31:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-03-10 21:31:01,489 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-03-10 21:31:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:01,491 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-03-10 21:31:01,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-03-10 21:31:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:31:01,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:01,491 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:01,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:01,705 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:01,705 INFO L82 PathProgramCache]: Analyzing trace with hash -289419034, now seen corresponding path program 27 times [2021-03-10 21:31:01,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:01,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893609764] [2021-03-10 21:31:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:01,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893609764] [2021-03-10 21:31:01,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596046158] [2021-03-10 21:31:01,760 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 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 [2021-03-10 21:31:01,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:01,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:01,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:31:01,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:01,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:01,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:31:01,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:02,001 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:02,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:02,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:02,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:02,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:02,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:31:02,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:02,046 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:31:02,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:02,046 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:31:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:02,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:02,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:31:02,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068110554] [2021-03-10 21:31:02,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:02,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:02,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:02,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:02,069 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:02,346 INFO L93 Difference]: Finished difference Result 141 states and 356 transitions. [2021-03-10 21:31:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:31:02,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:31:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:02,347 INFO L225 Difference]: With dead ends: 141 [2021-03-10 21:31:02,347 INFO L226 Difference]: Without dead ends: 131 [2021-03-10 21:31:02,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-03-10 21:31:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-03-10 21:31:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-03-10 21:31:02,349 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-03-10 21:31:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:02,350 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-03-10 21:31:02,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-03-10 21:31:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:31:02,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:02,350 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:02,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-03-10 21:31:02,566 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1421194274, now seen corresponding path program 28 times [2021-03-10 21:31:02,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:02,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077079281] [2021-03-10 21:31:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:02,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077079281] [2021-03-10 21:31:02,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619335985] [2021-03-10 21:31:02,618 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 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 [2021-03-10 21:31:02,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:02,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:02,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:31:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:02,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:02,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:31:02,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:02,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:02,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:02,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:02,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:02,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:02,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:31:02,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:02,873 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:31:02,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:02,873 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:31:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:02,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:02,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:31:02,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350306318] [2021-03-10 21:31:02,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:02,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:02,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:02,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:02,898 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:03,063 INFO L93 Difference]: Finished difference Result 128 states and 330 transitions. [2021-03-10 21:31:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:31:03,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:31:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:03,064 INFO L225 Difference]: With dead ends: 128 [2021-03-10 21:31:03,064 INFO L226 Difference]: Without dead ends: 123 [2021-03-10 21:31:03,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-03-10 21:31:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-03-10 21:31:03,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-03-10 21:31:03,066 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-03-10 21:31:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:03,067 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-03-10 21:31:03,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-03-10 21:31:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:31:03,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:03,067 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:03,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-03-10 21:31:03,278 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:03,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1384368026, now seen corresponding path program 29 times [2021-03-10 21:31:03,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:03,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943229533] [2021-03-10 21:31:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:03,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943229533] [2021-03-10 21:31:03,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817875894] [2021-03-10 21:31:03,327 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 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 [2021-03-10 21:31:03,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:31:03,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:03,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:31:03,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:03,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:03,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:31:03,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-03-10 21:31:03,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:03,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:03,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:03,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:03,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:03,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:31:03,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:03,587 INFO L628 ElimStorePlain]: treesize reduction 20, result has 42.9 percent of original size [2021-03-10 21:31:03,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:03,587 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:31:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:03,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:03,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:31:03,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661428185] [2021-03-10 21:31:03,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:03,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:03,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:03,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:03,610 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:03,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:03,862 INFO L93 Difference]: Finished difference Result 142 states and 360 transitions. [2021-03-10 21:31:03,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:31:03,863 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:31:03,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:03,863 INFO L225 Difference]: With dead ends: 142 [2021-03-10 21:31:03,863 INFO L226 Difference]: Without dead ends: 137 [2021-03-10 21:31:03,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:31:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-03-10 21:31:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-03-10 21:31:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-03-10 21:31:03,865 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-03-10 21:31:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:03,866 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-03-10 21:31:03,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-03-10 21:31:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:31:03,866 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:03,866 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:04,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:04,066 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:04,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:04,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1837513890, now seen corresponding path program 30 times [2021-03-10 21:31:04,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:04,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420471253] [2021-03-10 21:31:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:04,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420471253] [2021-03-10 21:31:04,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003234477] [2021-03-10 21:31:04,121 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) [2021-03-10 21:31:04,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:31:04,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:31:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:04,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:04,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:31:04,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-03-10 21:31:04,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:04,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:04,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:04,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:04,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:04,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:31:04,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:04,386 INFO L628 ElimStorePlain]: treesize reduction 20, result has 42.9 percent of original size [2021-03-10 21:31:04,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:04,387 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:31:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:04,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:04,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:31:04,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531240740] [2021-03-10 21:31:04,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:04,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:04,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:04,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:04,409 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:04,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:04,709 INFO L93 Difference]: Finished difference Result 154 states and 387 transitions. [2021-03-10 21:31:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:31:04,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:31:04,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:04,710 INFO L225 Difference]: With dead ends: 154 [2021-03-10 21:31:04,710 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 21:31:04,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:31:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 21:31:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 94. [2021-03-10 21:31:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-03-10 21:31:04,712 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-03-10 21:31:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:04,712 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-03-10 21:31:04,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-03-10 21:31:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:31:04,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:04,712 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:04,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:04,931 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:04,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:04,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1363361818, now seen corresponding path program 31 times [2021-03-10 21:31:04,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:04,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018860129] [2021-03-10 21:31:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:04,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018860129] [2021-03-10 21:31:04,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503639830] [2021-03-10 21:31:04,983 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 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 [2021-03-10 21:31:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:31:04,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:05,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:05,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-03-10 21:31:05,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:05,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:05,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:05,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:31:05,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:05,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:05,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:31:05,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:05,266 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 21:31:05,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:05,266 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-03-10 21:31:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:05,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:05,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:31:05,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114473301] [2021-03-10 21:31:05,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:05,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:05,292 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:05,608 INFO L93 Difference]: Finished difference Result 159 states and 400 transitions. [2021-03-10 21:31:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:31:05,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:31:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:05,609 INFO L225 Difference]: With dead ends: 159 [2021-03-10 21:31:05,609 INFO L226 Difference]: Without dead ends: 154 [2021-03-10 21:31:05,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:31:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-10 21:31:05,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 96. [2021-03-10 21:31:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.7578947368421054) internal successors, (262), 95 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 262 transitions. [2021-03-10 21:31:05,611 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 262 transitions. Word has length 15 [2021-03-10 21:31:05,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:05,612 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 262 transitions. [2021-03-10 21:31:05,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 262 transitions. [2021-03-10 21:31:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:05,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:05,612 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:05,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:05,823 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:05,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2020244300, now seen corresponding path program 32 times [2021-03-10 21:31:05,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:05,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596433989] [2021-03-10 21:31:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:05,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596433989] [2021-03-10 21:31:05,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277293093] [2021-03-10 21:31:05,898 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 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 [2021-03-10 21:31:05,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:05,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:05,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:06,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:06,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:06,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:06,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:06,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:06,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:31:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:06,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:06,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:06,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786828157] [2021-03-10 21:31:06,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:06,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:06,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:06,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:06,103 INFO L87 Difference]: Start difference. First operand 96 states and 262 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:06,295 INFO L93 Difference]: Finished difference Result 123 states and 314 transitions. [2021-03-10 21:31:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:06,295 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:06,296 INFO L225 Difference]: With dead ends: 123 [2021-03-10 21:31:06,296 INFO L226 Difference]: Without dead ends: 109 [2021-03-10 21:31:06,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-03-10 21:31:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-03-10 21:31:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7346938775510203) internal successors, (268), 98 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 268 transitions. [2021-03-10 21:31:06,298 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 268 transitions. Word has length 16 [2021-03-10 21:31:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:06,298 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 268 transitions. [2021-03-10 21:31:06,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 268 transitions. [2021-03-10 21:31:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:06,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:06,298 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:06,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-03-10 21:31:06,513 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:06,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:06,513 INFO L82 PathProgramCache]: Analyzing trace with hash 353840502, now seen corresponding path program 33 times [2021-03-10 21:31:06,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:06,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687917560] [2021-03-10 21:31:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:06,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687917560] [2021-03-10 21:31:06,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525399133] [2021-03-10 21:31:06,635 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 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 [2021-03-10 21:31:06,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:06,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:06,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:06,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:06,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:06,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:06,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:06,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:06,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:31:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:06,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:06,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:06,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944047201] [2021-03-10 21:31:06,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:06,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:06,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:06,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:06,856 INFO L87 Difference]: Start difference. First operand 99 states and 268 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:07,145 INFO L93 Difference]: Finished difference Result 118 states and 307 transitions. [2021-03-10 21:31:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:31:07,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:07,146 INFO L225 Difference]: With dead ends: 118 [2021-03-10 21:31:07,146 INFO L226 Difference]: Without dead ends: 109 [2021-03-10 21:31:07,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:07,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-03-10 21:31:07,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-03-10 21:31:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-03-10 21:31:07,148 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-03-10 21:31:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:07,148 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-03-10 21:31:07,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-03-10 21:31:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:07,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:07,148 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:07,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-03-10 21:31:07,359 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:07,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:07,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1212715032, now seen corresponding path program 34 times [2021-03-10 21:31:07,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:07,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636985694] [2021-03-10 21:31:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:07,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636985694] [2021-03-10 21:31:07,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056250010] [2021-03-10 21:31:07,469 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 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 [2021-03-10 21:31:07,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:07,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:07,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:07,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:07,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:07,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:07,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:07,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:07,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:07,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:07,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:08,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:08,088 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:08,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:08,089 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:08,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:08,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:08,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871806249] [2021-03-10 21:31:08,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:08,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:08,116 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:08,333 INFO L93 Difference]: Finished difference Result 140 states and 346 transitions. [2021-03-10 21:31:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:31:08,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:08,334 INFO L225 Difference]: With dead ends: 140 [2021-03-10 21:31:08,334 INFO L226 Difference]: Without dead ends: 130 [2021-03-10 21:31:08,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:31:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-03-10 21:31:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-03-10 21:31:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-03-10 21:31:08,336 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-03-10 21:31:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:08,336 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-03-10 21:31:08,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-03-10 21:31:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:08,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:08,337 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:08,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable797,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:08,543 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:08,543 INFO L82 PathProgramCache]: Analyzing trace with hash 865094314, now seen corresponding path program 35 times [2021-03-10 21:31:08,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:08,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358339107] [2021-03-10 21:31:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:08,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358339107] [2021-03-10 21:31:08,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089698476] [2021-03-10 21:31:08,617 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 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 [2021-03-10 21:31:08,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:31:08,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:08,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:08,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:08,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:08,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:08,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:08,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:08,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:08,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:09,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:09,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:09,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:09,473 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:09,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:09,474 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:09,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:09,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 21:31:09,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286169307] [2021-03-10 21:31:09,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:09,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:09,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:09,501 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:09,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:09,844 INFO L93 Difference]: Finished difference Result 156 states and 373 transitions. [2021-03-10 21:31:09,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:31:09,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:09,845 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:31:09,845 INFO L226 Difference]: Without dead ends: 146 [2021-03-10 21:31:09,845 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-03-10 21:31:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2021-03-10 21:31:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.7254901960784315) internal successors, (278), 102 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 278 transitions. [2021-03-10 21:31:09,847 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 278 transitions. Word has length 16 [2021-03-10 21:31:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:09,847 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 278 transitions. [2021-03-10 21:31:09,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 278 transitions. [2021-03-10 21:31:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:09,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:09,847 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:10,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-03-10 21:31:10,062 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:10,062 INFO L82 PathProgramCache]: Analyzing trace with hash -770929815, now seen corresponding path program 36 times [2021-03-10 21:31:10,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:10,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590244262] [2021-03-10 21:31:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:10,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590244262] [2021-03-10 21:31:10,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318757673] [2021-03-10 21:31:10,088 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 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 [2021-03-10 21:31:10,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:31:10,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:10,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:31:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:10,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:10,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:31:10,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657074241] [2021-03-10 21:31:10,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:31:10,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:10,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:31:10,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:31:10,127 INFO L87 Difference]: Start difference. First operand 103 states and 278 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:10,165 INFO L93 Difference]: Finished difference Result 216 states and 471 transitions. [2021-03-10 21:31:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:31:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:10,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:10,166 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:31:10,166 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:31:10,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:31:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 109. [2021-03-10 21:31:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.787037037037037) internal successors, (301), 108 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 301 transitions. [2021-03-10 21:31:10,169 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 301 transitions. Word has length 16 [2021-03-10 21:31:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:10,169 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 301 transitions. [2021-03-10 21:31:10,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 301 transitions. [2021-03-10 21:31:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:10,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:10,169 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:10,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-03-10 21:31:10,375 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:10,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:10,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1085138890, now seen corresponding path program 37 times [2021-03-10 21:31:10,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:10,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079459497] [2021-03-10 21:31:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:10,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079459497] [2021-03-10 21:31:10,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436067371] [2021-03-10 21:31:10,525 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 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 [2021-03-10 21:31:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:10,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:10,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:10,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:10,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:10,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:10,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:10,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:10,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:31:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:10,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:10,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:10,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967847263] [2021-03-10 21:31:10,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:10,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:10,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:10,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:10,754 INFO L87 Difference]: Start difference. First operand 109 states and 301 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:10,995 INFO L93 Difference]: Finished difference Result 126 states and 330 transitions. [2021-03-10 21:31:11,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:31:11,007 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:11,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:11,008 INFO L225 Difference]: With dead ends: 126 [2021-03-10 21:31:11,008 INFO L226 Difference]: Without dead ends: 117 [2021-03-10 21:31:11,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-03-10 21:31:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2021-03-10 21:31:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-03-10 21:31:11,010 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-03-10 21:31:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:11,010 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-03-10 21:31:11,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-03-10 21:31:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:11,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:11,010 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:11,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1290,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:11,223 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash -226264360, now seen corresponding path program 38 times [2021-03-10 21:31:11,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:11,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123582289] [2021-03-10 21:31:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:11,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123582289] [2021-03-10 21:31:11,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879817775] [2021-03-10 21:31:11,363 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:31:11,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:11,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:11,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:11,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:11,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:11,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:11,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:11,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:11,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:11,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:11,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:11,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:12,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-03-10 21:31:12,033 INFO L628 ElimStorePlain]: treesize reduction 54, result has 25.0 percent of original size [2021-03-10 21:31:12,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:12,033 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:12,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:12,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:12,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630506531] [2021-03-10 21:31:12,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:12,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:12,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:12,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:12,058 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:12,323 INFO L93 Difference]: Finished difference Result 150 states and 373 transitions. [2021-03-10 21:31:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:31:12,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:12,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:12,324 INFO L225 Difference]: With dead ends: 150 [2021-03-10 21:31:12,324 INFO L226 Difference]: Without dead ends: 140 [2021-03-10 21:31:12,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-03-10 21:31:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2021-03-10 21:31:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-03-10 21:31:12,326 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-03-10 21:31:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:12,326 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-03-10 21:31:12,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-03-10 21:31:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:12,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:12,326 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:12,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-03-10 21:31:12,541 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1484348948, now seen corresponding path program 39 times [2021-03-10 21:31:12,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:12,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103705717] [2021-03-10 21:31:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:12,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103705717] [2021-03-10 21:31:12,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945760046] [2021-03-10 21:31:12,626 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:31:12,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:12,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:12,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:12,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:12,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:12,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:12,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:12,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:13,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:13,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:13,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:13,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:13,364 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:13,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:13,364 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:13,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:13,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:13,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542796157] [2021-03-10 21:31:13,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:13,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:13,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:13,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:13,391 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:13,732 INFO L93 Difference]: Finished difference Result 171 states and 410 transitions. [2021-03-10 21:31:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:13,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:13,732 INFO L225 Difference]: With dead ends: 171 [2021-03-10 21:31:13,733 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 21:31:13,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:31:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 21:31:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 109. [2021-03-10 21:31:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-03-10 21:31:13,735 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-03-10 21:31:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:13,735 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-03-10 21:31:13,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-03-10 21:31:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:13,735 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:13,735 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:13,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1524,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:13,948 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:13,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1321213352, now seen corresponding path program 40 times [2021-03-10 21:31:13,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:13,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048039548] [2021-03-10 21:31:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:14,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048039548] [2021-03-10 21:31:14,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045119914] [2021-03-10 21:31:14,027 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 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 [2021-03-10 21:31:14,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:14,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:14,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:14,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:14,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:14,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:14,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:14,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:14,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:14,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:14,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:14,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:14,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:14,915 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:14,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:14,916 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:14,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:14,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983826602] [2021-03-10 21:31:14,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:14,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:14,942 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:15,342 INFO L93 Difference]: Finished difference Result 188 states and 439 transitions. [2021-03-10 21:31:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:15,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:15,342 INFO L225 Difference]: With dead ends: 188 [2021-03-10 21:31:15,342 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 21:31:15,343 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 381.5ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 21:31:15,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-03-10 21:31:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7636363636363637) internal successors, (304), 110 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 304 transitions. [2021-03-10 21:31:15,351 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 304 transitions. Word has length 16 [2021-03-10 21:31:15,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:15,351 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 304 transitions. [2021-03-10 21:31:15,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 304 transitions. [2021-03-10 21:31:15,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:15,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:15,352 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:15,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1757 [2021-03-10 21:31:15,557 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:15,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2082432313, now seen corresponding path program 41 times [2021-03-10 21:31:15,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:15,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82870816] [2021-03-10 21:31:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:15,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82870816] [2021-03-10 21:31:15,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544649305] [2021-03-10 21:31:15,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:31:15,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:31:15,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:31:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:15,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:15,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:31:15,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319466281] [2021-03-10 21:31:15,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:15,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:15,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:15,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:15,655 INFO L87 Difference]: Start difference. First operand 111 states and 304 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:15,710 INFO L93 Difference]: Finished difference Result 260 states and 558 transitions. [2021-03-10 21:31:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:31:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:15,711 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:31:15,711 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:31:15,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:31:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:31:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 121. [2021-03-10 21:31:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.825) internal successors, (339), 120 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 339 transitions. [2021-03-10 21:31:15,713 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 339 transitions. Word has length 16 [2021-03-10 21:31:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:15,713 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 339 transitions. [2021-03-10 21:31:15,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 339 transitions. [2021-03-10 21:31:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:15,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:15,714 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:15,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2026 [2021-03-10 21:31:15,927 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash 931885580, now seen corresponding path program 42 times [2021-03-10 21:31:15,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:15,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311740056] [2021-03-10 21:31:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:16,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311740056] [2021-03-10 21:31:16,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125697676] [2021-03-10 21:31:16,055 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 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 [2021-03-10 21:31:16,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:31:16,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:16,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:16,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:16,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:16,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:16,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:16,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:16,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:16,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:31:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:16,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:16,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:16,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169971397] [2021-03-10 21:31:16,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:16,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:16,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:16,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:16,261 INFO L87 Difference]: Start difference. First operand 121 states and 339 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:16,519 INFO L93 Difference]: Finished difference Result 136 states and 365 transitions. [2021-03-10 21:31:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:31:16,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:16,519 INFO L225 Difference]: With dead ends: 136 [2021-03-10 21:31:16,519 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 21:31:16,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 21:31:16,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-03-10 21:31:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-03-10 21:31:16,525 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-03-10 21:31:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:16,525 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-03-10 21:31:16,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-03-10 21:31:16,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:16,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:16,525 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:16,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2027,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:16,739 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:16,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1790760110, now seen corresponding path program 43 times [2021-03-10 21:31:16,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:16,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949386019] [2021-03-10 21:31:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:16,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949386019] [2021-03-10 21:31:16,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360390401] [2021-03-10 21:31:16,865 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 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 [2021-03-10 21:31:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:16,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:16,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:17,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:17,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:17,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:17,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:17,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:17,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:17,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:17,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:17,948 INFO L628 ElimStorePlain]: treesize reduction 51, result has 26.1 percent of original size [2021-03-10 21:31:17,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:17,949 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:17,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:17,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:17,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036857460] [2021-03-10 21:31:17,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:17,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:17,973 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:18,254 INFO L93 Difference]: Finished difference Result 163 states and 416 transitions. [2021-03-10 21:31:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:18,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:18,255 INFO L225 Difference]: With dead ends: 163 [2021-03-10 21:31:18,255 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 21:31:18,255 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:31:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 21:31:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-03-10 21:31:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-03-10 21:31:18,257 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-03-10 21:31:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:18,257 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-03-10 21:31:18,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-03-10 21:31:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:18,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:18,258 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:18,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2050,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:18,471 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:18,471 INFO L82 PathProgramCache]: Analyzing trace with hash -793593878, now seen corresponding path program 44 times [2021-03-10 21:31:18,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:18,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557028745] [2021-03-10 21:31:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:18,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557028745] [2021-03-10 21:31:18,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851094138] [2021-03-10 21:31:18,555 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:31:18,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:18,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:18,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:18,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:18,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:18,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:18,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:18,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:18,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:18,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:19,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:19,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:19,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:19,351 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:19,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:19,352 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:19,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:19,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:19,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261308511] [2021-03-10 21:31:19,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:19,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:19,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:19,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:19,384 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:19,774 INFO L93 Difference]: Finished difference Result 192 states and 470 transitions. [2021-03-10 21:31:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:31:19,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:19,775 INFO L225 Difference]: With dead ends: 192 [2021-03-10 21:31:19,776 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 21:31:19,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 21:31:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2021-03-10 21:31:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-03-10 21:31:19,778 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-03-10 21:31:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:19,778 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-03-10 21:31:19,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-03-10 21:31:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:19,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:19,778 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:19,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2523,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:19,983 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:19,983 INFO L82 PathProgramCache]: Analyzing trace with hash 695811118, now seen corresponding path program 45 times [2021-03-10 21:31:19,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:19,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853150245] [2021-03-10 21:31:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:20,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853150245] [2021-03-10 21:31:20,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968837805] [2021-03-10 21:31:20,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:31:20,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:20,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:20,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:20,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:20,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:20,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:20,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:20,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:20,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:20,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:20,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:20,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:20,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:20,660 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:20,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:20,661 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:20,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:20,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:20,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18750991] [2021-03-10 21:31:20,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:20,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:20,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:20,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:20,684 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:21,105 INFO L93 Difference]: Finished difference Result 205 states and 493 transitions. [2021-03-10 21:31:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:31:21,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:21,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:21,106 INFO L225 Difference]: With dead ends: 205 [2021-03-10 21:31:21,106 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 21:31:21,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:31:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 21:31:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 121. [2021-03-10 21:31:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-03-10 21:31:21,108 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-03-10 21:31:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:21,108 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-03-10 21:31:21,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:21,108 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-03-10 21:31:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:21,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:21,109 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:21,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2778 [2021-03-10 21:31:21,323 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:21,323 INFO L82 PathProgramCache]: Analyzing trace with hash -377274262, now seen corresponding path program 46 times [2021-03-10 21:31:21,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:21,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963803077] [2021-03-10 21:31:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:21,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963803077] [2021-03-10 21:31:21,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730715447] [2021-03-10 21:31:21,403 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 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 [2021-03-10 21:31:21,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:21,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:21,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:21,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:21,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:21,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:21,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:21,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:21,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:21,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:21,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:22,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:22,191 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:22,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:22,192 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:22,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:22,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:22,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982759317] [2021-03-10 21:31:22,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:22,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:22,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:22,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:22,216 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:22,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:22,599 INFO L93 Difference]: Finished difference Result 165 states and 407 transitions. [2021-03-10 21:31:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:22,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:22,600 INFO L225 Difference]: With dead ends: 165 [2021-03-10 21:31:22,600 INFO L226 Difference]: Without dead ends: 155 [2021-03-10 21:31:22,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-03-10 21:31:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2021-03-10 21:31:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.7868852459016393) internal successors, (340), 122 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 340 transitions. [2021-03-10 21:31:22,603 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 340 transitions. Word has length 16 [2021-03-10 21:31:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:22,603 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 340 transitions. [2021-03-10 21:31:22,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 340 transitions. [2021-03-10 21:31:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:22,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:22,604 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:22,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2962,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:22,804 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:22,804 INFO L82 PathProgramCache]: Analyzing trace with hash 342345065, now seen corresponding path program 47 times [2021-03-10 21:31:22,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:22,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029322537] [2021-03-10 21:31:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:22,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029322537] [2021-03-10 21:31:22,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196575069] [2021-03-10 21:31:22,834 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 [2021-03-10 21:31:22,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:31:22,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:22,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:31:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:22,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:22,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:31:22,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814934674] [2021-03-10 21:31:22,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:22,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:22,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:22,884 INFO L87 Difference]: Start difference. First operand 123 states and 340 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:22,969 INFO L93 Difference]: Finished difference Result 247 states and 556 transitions. [2021-03-10 21:31:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:31:22,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:22,970 INFO L225 Difference]: With dead ends: 247 [2021-03-10 21:31:22,970 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 21:31:22,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:31:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 21:31:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 134. [2021-03-10 21:31:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-03-10 21:31:22,974 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 16 [2021-03-10 21:31:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:22,974 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-03-10 21:31:22,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-03-10 21:31:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:22,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:22,975 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:23,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3209 [2021-03-10 21:31:23,190 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash -964865290, now seen corresponding path program 48 times [2021-03-10 21:31:23,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:23,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023136390] [2021-03-10 21:31:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:23,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023136390] [2021-03-10 21:31:23,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342287130] [2021-03-10 21:31:23,331 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 [2021-03-10 21:31:23,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:31:23,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:23,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:23,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:23,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:23,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:23,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:23,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:23,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:23,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:31:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:23,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:23,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:23,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064062083] [2021-03-10 21:31:23,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:23,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:23,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:23,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:23,528 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:23,767 INFO L93 Difference]: Finished difference Result 150 states and 406 transitions. [2021-03-10 21:31:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:31:23,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:23,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:23,768 INFO L225 Difference]: With dead ends: 150 [2021-03-10 21:31:23,768 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 21:31:23,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 311.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 21:31:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-03-10 21:31:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-03-10 21:31:23,771 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-03-10 21:31:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:23,771 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-03-10 21:31:23,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-03-10 21:31:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:23,771 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:23,771 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:23,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3210 [2021-03-10 21:31:23,972 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:23,972 INFO L82 PathProgramCache]: Analyzing trace with hash -105990760, now seen corresponding path program 49 times [2021-03-10 21:31:23,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:23,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730179244] [2021-03-10 21:31:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:24,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730179244] [2021-03-10 21:31:24,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588594656] [2021-03-10 21:31:24,099 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 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 [2021-03-10 21:31:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:24,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:24,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:24,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:24,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:24,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:24,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:24,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:24,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:24,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:24,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:24,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:25,001 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:25,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:25,002 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:25,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:25,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:25,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136363745] [2021-03-10 21:31:25,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:25,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:25,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:25,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:25,026 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:25,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:25,370 INFO L93 Difference]: Finished difference Result 179 states and 464 transitions. [2021-03-10 21:31:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:25,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:25,371 INFO L225 Difference]: With dead ends: 179 [2021-03-10 21:31:25,371 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 21:31:25,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:31:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 21:31:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-03-10 21:31:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-03-10 21:31:25,373 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-03-10 21:31:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:25,373 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-03-10 21:31:25,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-03-10 21:31:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:25,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:25,374 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:25,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3232 [2021-03-10 21:31:25,584 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:25,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1604622548, now seen corresponding path program 50 times [2021-03-10 21:31:25,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:25,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089328895] [2021-03-10 21:31:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:25,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089328895] [2021-03-10 21:31:25,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352132018] [2021-03-10 21:31:25,663 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 [2021-03-10 21:31:25,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:25,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:25,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:25,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:25,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:25,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:25,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:25,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:25,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:25,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:26,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:26,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:26,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:26,343 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:26,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:26,343 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:26,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:26,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:26,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286920826] [2021-03-10 21:31:26,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:26,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:26,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:26,367 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:26,697 INFO L93 Difference]: Finished difference Result 203 states and 504 transitions. [2021-03-10 21:31:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:26,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:26,698 INFO L225 Difference]: With dead ends: 203 [2021-03-10 21:31:26,698 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 21:31:26,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 21:31:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 134. [2021-03-10 21:31:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-03-10 21:31:26,701 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-03-10 21:31:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:26,701 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-03-10 21:31:26,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-03-10 21:31:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:26,701 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:26,701 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:26,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3578,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:26,915 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1200939752, now seen corresponding path program 51 times [2021-03-10 21:31:26,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:26,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185766383] [2021-03-10 21:31:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:26,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185766383] [2021-03-10 21:31:26,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791211999] [2021-03-10 21:31:26,987 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 [2021-03-10 21:31:27,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:27,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:27,003 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:27,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:27,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:27,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:27,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:27,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:27,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:27,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:27,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:27,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:27,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:27,730 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:27,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:27,731 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:27,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:27,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:27,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097249654] [2021-03-10 21:31:27,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:27,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:27,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:27,756 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:28,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:28,318 INFO L93 Difference]: Finished difference Result 226 states and 546 transitions. [2021-03-10 21:31:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:31:28,319 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:28,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:28,319 INFO L225 Difference]: With dead ends: 226 [2021-03-10 21:31:28,320 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:31:28,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:31:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:31:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 134. [2021-03-10 21:31:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-03-10 21:31:28,322 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-03-10 21:31:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:28,322 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-03-10 21:31:28,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-03-10 21:31:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:28,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:28,322 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:28,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3801 [2021-03-10 21:31:28,523 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:28,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2020942164, now seen corresponding path program 52 times [2021-03-10 21:31:28,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:28,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112713707] [2021-03-10 21:31:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:28,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112713707] [2021-03-10 21:31:28,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179438672] [2021-03-10 21:31:28,590 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 [2021-03-10 21:31:28,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:28,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:28,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:28,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:28,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:28,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:28,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:28,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:28,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:28,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:29,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:29,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:29,292 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:29,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:29,292 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:29,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:29,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:29,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640595157] [2021-03-10 21:31:29,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:29,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:29,316 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:29,696 INFO L93 Difference]: Finished difference Result 186 states and 456 transitions. [2021-03-10 21:31:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:29,697 INFO L225 Difference]: With dead ends: 186 [2021-03-10 21:31:29,697 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 21:31:29,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:31:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 21:31:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 134. [2021-03-10 21:31:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-03-10 21:31:29,699 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-03-10 21:31:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:29,699 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-03-10 21:31:29,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-03-10 21:31:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:29,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:29,700 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:29,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-03-10 21:31:29,911 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:29,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:29,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1179933544, now seen corresponding path program 53 times [2021-03-10 21:31:29,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:29,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351620432] [2021-03-10 21:31:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:29,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351620432] [2021-03-10 21:31:29,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009053015] [2021-03-10 21:31:29,979 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 [2021-03-10 21:31:29,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:31:29,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:29,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:29,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:30,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:30,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:30,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:30,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:30,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:30,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:30,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:30,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:30,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:30,663 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:30,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:30,664 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:30,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:30,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:30,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17414673] [2021-03-10 21:31:30,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:30,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:30,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:30,688 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:31,139 INFO L93 Difference]: Finished difference Result 186 states and 464 transitions. [2021-03-10 21:31:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:31,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:31,140 INFO L225 Difference]: With dead ends: 186 [2021-03-10 21:31:31,140 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 21:31:31,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 549.5ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:31:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 21:31:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-03-10 21:31:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8) internal successors, (378), 135 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 378 transitions. [2021-03-10 21:31:31,142 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 378 transitions. Word has length 16 [2021-03-10 21:31:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:31,143 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 378 transitions. [2021-03-10 21:31:31,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 378 transitions. [2021-03-10 21:31:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:31,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:31,143 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:31,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4247,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:31,357 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:31,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2060752071, now seen corresponding path program 54 times [2021-03-10 21:31:31,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:31,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679562157] [2021-03-10 21:31:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:31,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679562157] [2021-03-10 21:31:31,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199993221] [2021-03-10 21:31:31,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:31:31,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:31:31,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:31,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:31:31,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:31,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:31,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:31:31,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737026007] [2021-03-10 21:31:31,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:31,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:31,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:31,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:31,434 INFO L87 Difference]: Start difference. First operand 136 states and 378 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:31,543 INFO L93 Difference]: Finished difference Result 245 states and 574 transitions. [2021-03-10 21:31:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:31:31,543 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:31,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:31,544 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:31:31,544 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 21:31:31,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 21:31:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 144. [2021-03-10 21:31:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-03-10 21:31:31,547 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-03-10 21:31:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:31,547 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-03-10 21:31:31,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,547 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-03-10 21:31:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:31,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:31,547 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:31,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4454,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:31,755 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:31,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:31,755 INFO L82 PathProgramCache]: Analyzing trace with hash 365399884, now seen corresponding path program 55 times [2021-03-10 21:31:31,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:31,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801029378] [2021-03-10 21:31:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:31,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801029378] [2021-03-10 21:31:31,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703610698] [2021-03-10 21:31:31,902 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 [2021-03-10 21:31:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:31,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:31,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:32,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:32,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:32,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:32,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:32,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:32,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-03-10 21:31:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:32,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:32,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:32,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143469929] [2021-03-10 21:31:32,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:32,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:32,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:32,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:32,106 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:32,291 INFO L93 Difference]: Finished difference Result 164 states and 445 transitions. [2021-03-10 21:31:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:31:32,292 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:32,292 INFO L225 Difference]: With dead ends: 164 [2021-03-10 21:31:32,292 INFO L226 Difference]: Without dead ends: 155 [2021-03-10 21:31:32,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-03-10 21:31:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-03-10 21:31:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-03-10 21:31:32,294 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-03-10 21:31:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:32,294 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-03-10 21:31:32,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-03-10 21:31:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:32,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:32,295 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:32,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4455,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:32,509 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:32,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1224274414, now seen corresponding path program 56 times [2021-03-10 21:31:32,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:32,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149534277] [2021-03-10 21:31:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:32,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149534277] [2021-03-10 21:31:32,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913350682] [2021-03-10 21:31:32,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:31:32,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:32,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:32,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:32,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:32,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:32,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:32,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:32,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:32,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:32,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:33,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:33,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:33,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:33,589 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:33,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:33,590 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:33,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:33,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:33,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953727142] [2021-03-10 21:31:33,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:33,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:33,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:33,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:33,614 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:33,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:33,922 INFO L93 Difference]: Finished difference Result 199 states and 522 transitions. [2021-03-10 21:31:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:33,923 INFO L225 Difference]: With dead ends: 199 [2021-03-10 21:31:33,923 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:31:33,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:31:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-03-10 21:31:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-03-10 21:31:33,925 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-03-10 21:31:33,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:33,926 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-03-10 21:31:33,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-03-10 21:31:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:33,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:33,926 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:34,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4486 [2021-03-10 21:31:34,139 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:34,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:34,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1360079574, now seen corresponding path program 57 times [2021-03-10 21:31:34,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:34,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582964506] [2021-03-10 21:31:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:34,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582964506] [2021-03-10 21:31:34,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873243222] [2021-03-10 21:31:34,235 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) [2021-03-10 21:31:34,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:34,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:34,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:34,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:34,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:34,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:34,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:34,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:34,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-03-10 21:31:34,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:35,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:35,166 INFO L628 ElimStorePlain]: treesize reduction 59, result has 23.4 percent of original size [2021-03-10 21:31:35,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:35,166 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:35,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:35,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:35,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435485320] [2021-03-10 21:31:35,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:35,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:35,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:35,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:35,190 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:35,607 INFO L93 Difference]: Finished difference Result 222 states and 560 transitions. [2021-03-10 21:31:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:31:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:35,608 INFO L225 Difference]: With dead ends: 222 [2021-03-10 21:31:35,608 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:31:35,608 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:31:35,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:31:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 145. [2021-03-10 21:31:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-03-10 21:31:35,610 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-03-10 21:31:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:35,610 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-03-10 21:31:35,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-03-10 21:31:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:35,611 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:35,611 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:35,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4855 [2021-03-10 21:31:35,811 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:35,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1298863593, now seen corresponding path program 58 times [2021-03-10 21:31:35,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:35,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063365174] [2021-03-10 21:31:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:35,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063365174] [2021-03-10 21:31:35,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060705019] [2021-03-10 21:31:35,843 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) [2021-03-10 21:31:35,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:35,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:35,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:31:35,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:35,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:35,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:31:35,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7664117] [2021-03-10 21:31:35,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:31:35,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:35,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:31:35,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:31:35,885 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:35,928 INFO L93 Difference]: Finished difference Result 273 states and 654 transitions. [2021-03-10 21:31:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:31:35,928 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:35,929 INFO L225 Difference]: With dead ends: 273 [2021-03-10 21:31:35,929 INFO L226 Difference]: Without dead ends: 273 [2021-03-10 21:31:35,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-03-10 21:31:35,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 175. [2021-03-10 21:31:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8908045977011496) internal successors, (503), 174 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 503 transitions. [2021-03-10 21:31:35,932 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 503 transitions. Word has length 16 [2021-03-10 21:31:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:35,932 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 503 transitions. [2021-03-10 21:31:35,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 503 transitions. [2021-03-10 21:31:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:35,932 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:35,932 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:36,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5218,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:36,143 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:36,143 INFO L82 PathProgramCache]: Analyzing trace with hash 129325422, now seen corresponding path program 59 times [2021-03-10 21:31:36,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:36,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125933828] [2021-03-10 21:31:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:36,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125933828] [2021-03-10 21:31:36,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427676537] [2021-03-10 21:31:36,209 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 [2021-03-10 21:31:36,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:31:36,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:36,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:36,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:36,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:36,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:36,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:36,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:36,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:36,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:36,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:36,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:36,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:36,850 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:36,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:36,850 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:36,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:36,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:36,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20662950] [2021-03-10 21:31:36,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:36,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:36,874 INFO L87 Difference]: Start difference. First operand 175 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:37,346 INFO L93 Difference]: Finished difference Result 273 states and 689 transitions. [2021-03-10 21:31:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:31:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:37,348 INFO L225 Difference]: With dead ends: 273 [2021-03-10 21:31:37,348 INFO L226 Difference]: Without dead ends: 263 [2021-03-10 21:31:37,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:31:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-03-10 21:31:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 176. [2021-03-10 21:31:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.874285714285714) internal successors, (503), 175 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 503 transitions. [2021-03-10 21:31:37,350 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 503 transitions. Word has length 16 [2021-03-10 21:31:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:37,350 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 503 transitions. [2021-03-10 21:31:37,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 503 transitions. [2021-03-10 21:31:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:37,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:37,351 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:37,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5219 [2021-03-10 21:31:37,559 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:37,559 INFO L82 PathProgramCache]: Analyzing trace with hash -761996209, now seen corresponding path program 60 times [2021-03-10 21:31:37,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:37,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000876653] [2021-03-10 21:31:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:37,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000876653] [2021-03-10 21:31:37,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986076156] [2021-03-10 21:31:37,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:31:37,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:31:37,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:31:37,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:37,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:37,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:31:37,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325064350] [2021-03-10 21:31:37,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:37,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:37,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:37,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:37,633 INFO L87 Difference]: Start difference. First operand 176 states and 503 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:37,691 INFO L93 Difference]: Finished difference Result 300 states and 694 transitions. [2021-03-10 21:31:37,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:31:37,691 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:37,692 INFO L225 Difference]: With dead ends: 300 [2021-03-10 21:31:37,692 INFO L226 Difference]: Without dead ends: 300 [2021-03-10 21:31:37,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:31:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-03-10 21:31:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 174. [2021-03-10 21:31:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-03-10 21:31:37,695 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-03-10 21:31:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:37,695 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-03-10 21:31:37,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-03-10 21:31:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:37,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:37,695 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:37,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5427,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:37,899 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:37,899 INFO L82 PathProgramCache]: Analyzing trace with hash -943759958, now seen corresponding path program 61 times [2021-03-10 21:31:37,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:37,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221811371] [2021-03-10 21:31:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:37,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221811371] [2021-03-10 21:31:37,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978106206] [2021-03-10 21:31:37,984 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 [2021-03-10 21:31:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:38,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:38,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:38,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:38,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:38,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:38,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:38,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:38,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:38,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:38,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:38,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:38,957 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:38,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:38,958 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:38,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:38,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:38,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881728451] [2021-03-10 21:31:38,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:38,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:38,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:38,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:38,983 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:39,424 INFO L93 Difference]: Finished difference Result 242 states and 614 transitions. [2021-03-10 21:31:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:39,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:39,425 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:31:39,426 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:31:39,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 534.5ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:31:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:31:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 174. [2021-03-10 21:31:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-03-10 21:31:39,436 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-03-10 21:31:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:39,437 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-03-10 21:31:39,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-03-10 21:31:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:39,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:39,437 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:39,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5428 [2021-03-10 21:31:39,652 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash -224140631, now seen corresponding path program 62 times [2021-03-10 21:31:39,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:39,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295434362] [2021-03-10 21:31:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:39,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295434362] [2021-03-10 21:31:39,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404315339] [2021-03-10 21:31:39,678 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 [2021-03-10 21:31:39,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:39,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:39,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:31:39,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:39,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:39,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:31:39,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114519390] [2021-03-10 21:31:39,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:39,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:39,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:39,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:39,722 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:39,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:39,797 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2021-03-10 21:31:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:31:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:39,798 INFO L225 Difference]: With dead ends: 262 [2021-03-10 21:31:39,798 INFO L226 Difference]: Without dead ends: 262 [2021-03-10 21:31:39,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:31:39,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-03-10 21:31:39,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 167. [2021-03-10 21:31:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-03-10 21:31:39,801 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-03-10 21:31:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:39,801 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-03-10 21:31:39,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-03-10 21:31:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:39,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:39,801 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:40,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5771,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:40,016 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:40,016 INFO L82 PathProgramCache]: Analyzing trace with hash 150331630, now seen corresponding path program 63 times [2021-03-10 21:31:40,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:40,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656457369] [2021-03-10 21:31:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:40,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656457369] [2021-03-10 21:31:40,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874697366] [2021-03-10 21:31:40,081 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 [2021-03-10 21:31:40,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:31:40,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:40,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:40,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:40,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:40,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:40,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:40,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:40,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:40,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:40,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:40,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:41,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:41,044 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:41,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:41,045 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:41,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:41,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:41,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673442648] [2021-03-10 21:31:41,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:41,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:41,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:41,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:41,069 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:41,588 INFO L93 Difference]: Finished difference Result 233 states and 590 transitions. [2021-03-10 21:31:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:41,589 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:31:41,589 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 21:31:41,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:31:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 21:31:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2021-03-10 21:31:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-03-10 21:31:41,592 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-03-10 21:31:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:41,592 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-03-10 21:31:41,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-03-10 21:31:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:41,592 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:41,592 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:41,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5772 [2021-03-10 21:31:41,793 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash -730486897, now seen corresponding path program 64 times [2021-03-10 21:31:41,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:41,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56450284] [2021-03-10 21:31:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:41,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56450284] [2021-03-10 21:31:41,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498891490] [2021-03-10 21:31:41,823 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 [2021-03-10 21:31:41,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:41,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:41,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:31:41,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:41,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:41,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:31:41,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491241208] [2021-03-10 21:31:41,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:41,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:41,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:41,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:41,865 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:41,959 INFO L93 Difference]: Finished difference Result 257 states and 618 transitions. [2021-03-10 21:31:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:31:41,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:41,960 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:31:41,960 INFO L226 Difference]: Without dead ends: 257 [2021-03-10 21:31:41,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-03-10 21:31:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 167. [2021-03-10 21:31:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-03-10 21:31:41,962 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-03-10 21:31:41,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:41,962 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-03-10 21:31:41,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,962 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-03-10 21:31:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:41,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:41,963 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:42,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6121 [2021-03-10 21:31:42,172 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash -292567510, now seen corresponding path program 65 times [2021-03-10 21:31:42,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:42,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461182073] [2021-03-10 21:31:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:42,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461182073] [2021-03-10 21:31:42,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505133037] [2021-03-10 21:31:42,244 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 [2021-03-10 21:31:42,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:31:42,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:42,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:31:42,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:42,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:42,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-03-10 21:31:42,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:42,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:42,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-03-10 21:31:42,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:42,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:42,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-03-10 21:31:43,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:43,116 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-03-10 21:31:43,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:43,117 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-03-10 21:31:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:43,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:43,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:31:43,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949181506] [2021-03-10 21:31:43,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:43,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:43,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:43,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:43,150 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:43,703 INFO L93 Difference]: Finished difference Result 220 states and 566 transitions. [2021-03-10 21:31:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:43,704 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:31:43,704 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 21:31:43,704 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 678.1ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:31:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 21:31:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-03-10 21:31:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.8392857142857144) internal successors, (477), 168 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 477 transitions. [2021-03-10 21:31:43,706 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 477 transitions. Word has length 16 [2021-03-10 21:31:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:43,706 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 477 transitions. [2021-03-10 21:31:43,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 477 transitions. [2021-03-10 21:31:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:31:43,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:43,707 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:43,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6122 [2021-03-10 21:31:43,907 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:43,908 INFO L82 PathProgramCache]: Analyzing trace with hash 752648041, now seen corresponding path program 66 times [2021-03-10 21:31:43,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:43,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246114473] [2021-03-10 21:31:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246114473] [2021-03-10 21:31:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563480352] [2021-03-10 21:31:43,939 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 [2021-03-10 21:31:43,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:31:43,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:43,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:31:43,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:43,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:43,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:31:43,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679675362] [2021-03-10 21:31:43,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:43,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:43,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:43,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:43,981 INFO L87 Difference]: Start difference. First operand 169 states and 477 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:44,077 INFO L93 Difference]: Finished difference Result 283 states and 699 transitions. [2021-03-10 21:31:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:31:44,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:31:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:44,078 INFO L225 Difference]: With dead ends: 283 [2021-03-10 21:31:44,078 INFO L226 Difference]: Without dead ends: 283 [2021-03-10 21:31:44,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-03-10 21:31:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 176. [2021-03-10 21:31:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8457142857142856) internal successors, (498), 175 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 498 transitions. [2021-03-10 21:31:44,081 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 498 transitions. Word has length 16 [2021-03-10 21:31:44,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:44,081 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 498 transitions. [2021-03-10 21:31:44,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 498 transitions. [2021-03-10 21:31:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:44,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:44,081 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:44,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6422,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:44,291 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:44,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:44,291 INFO L82 PathProgramCache]: Analyzing trace with hash -883413798, now seen corresponding path program 67 times [2021-03-10 21:31:44,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:44,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266653653] [2021-03-10 21:31:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:44,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266653653] [2021-03-10 21:31:44,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079180738] [2021-03-10 21:31:44,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:31:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:44,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:44,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:44,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:44,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:44,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:44,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:44,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:31:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:44,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:44,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:44,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902317272] [2021-03-10 21:31:44,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:44,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:44,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:44,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:44,730 INFO L87 Difference]: Start difference. First operand 176 states and 498 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:44,970 INFO L93 Difference]: Finished difference Result 212 states and 582 transitions. [2021-03-10 21:31:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:44,971 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:31:44,971 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 21:31:44,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 21:31:44,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2021-03-10 21:31:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8702702702702703) internal successors, (531), 185 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 531 transitions. [2021-03-10 21:31:44,974 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 531 transitions. Word has length 17 [2021-03-10 21:31:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:44,974 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 531 transitions. [2021-03-10 21:31:44,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 531 transitions. [2021-03-10 21:31:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:44,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:44,974 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:45,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6423,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:45,184 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:45,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:45,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1745149700, now seen corresponding path program 68 times [2021-03-10 21:31:45,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:45,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066335347] [2021-03-10 21:31:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:45,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066335347] [2021-03-10 21:31:45,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790895535] [2021-03-10 21:31:45,291 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 [2021-03-10 21:31:45,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:45,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:45,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:45,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:45,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:45,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:45,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:45,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:45,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:45,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:31:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:45,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:45,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:45,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879312544] [2021-03-10 21:31:45,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:45,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:45,598 INFO L87 Difference]: Start difference. First operand 186 states and 531 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:45,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:45,880 INFO L93 Difference]: Finished difference Result 207 states and 575 transitions. [2021-03-10 21:31:45,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:31:45,880 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:45,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:45,881 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:31:45,881 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 21:31:45,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 21:31:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2021-03-10 21:31:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:45,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-03-10 21:31:45,883 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-03-10 21:31:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:45,883 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-03-10 21:31:45,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:45,884 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-03-10 21:31:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:45,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:45,884 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:46,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6507,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:46,098 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:46,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1690943066, now seen corresponding path program 69 times [2021-03-10 21:31:46,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:46,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584980905] [2021-03-10 21:31:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:46,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584980905] [2021-03-10 21:31:46,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582979498] [2021-03-10 21:31:46,207 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 [2021-03-10 21:31:46,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:46,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:46,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:46,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:46,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-03-10 21:31:46,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:46,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:46,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:46,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:46,998 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:46,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:46,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-03-10 21:31:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:47,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:47,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:47,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179059249] [2021-03-10 21:31:47,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:47,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:47,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:47,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:47,025 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:47,343 INFO L93 Difference]: Finished difference Result 235 states and 628 transitions. [2021-03-10 21:31:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:47,344 INFO L225 Difference]: With dead ends: 235 [2021-03-10 21:31:47,344 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 21:31:47,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:31:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 21:31:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2021-03-10 21:31:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8594594594594596) internal successors, (529), 185 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 529 transitions. [2021-03-10 21:31:47,347 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 529 transitions. Word has length 17 [2021-03-10 21:31:47,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:47,347 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 529 transitions. [2021-03-10 21:31:47,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,347 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 529 transitions. [2021-03-10 21:31:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:47,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:47,347 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:47,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6553 [2021-03-10 21:31:47,551 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:47,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2038563784, now seen corresponding path program 70 times [2021-03-10 21:31:47,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:47,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176859845] [2021-03-10 21:31:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:47,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176859845] [2021-03-10 21:31:47,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816283135] [2021-03-10 21:31:47,668 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 [2021-03-10 21:31:47,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:47,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:47,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:47,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:47,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:47,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-03-10 21:31:48,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:48,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:48,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:48,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:48,239 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:48,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:48,240 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-03-10 21:31:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:48,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:48,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:48,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615628663] [2021-03-10 21:31:48,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:48,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:48,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:48,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:48,266 INFO L87 Difference]: Start difference. First operand 186 states and 529 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:48,683 INFO L93 Difference]: Finished difference Result 263 states and 678 transitions. [2021-03-10 21:31:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:31:48,683 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:48,684 INFO L225 Difference]: With dead ends: 263 [2021-03-10 21:31:48,684 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 21:31:48,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 21:31:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 187. [2021-03-10 21:31:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-03-10 21:31:48,687 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-03-10 21:31:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:48,687 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-03-10 21:31:48,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-03-10 21:31:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:48,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:48,687 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:48,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6860 [2021-03-10 21:31:48,888 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:48,888 INFO L82 PathProgramCache]: Analyzing trace with hash 620379383, now seen corresponding path program 71 times [2021-03-10 21:31:48,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:48,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429318496] [2021-03-10 21:31:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:48,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429318496] [2021-03-10 21:31:48,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969755980] [2021-03-10 21:31:48,918 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 [2021-03-10 21:31:48,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:31:48,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:48,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:48,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:48,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:48,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:31:48,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204107732] [2021-03-10 21:31:48,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:48,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:48,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:48,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:48,968 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:49,015 INFO L93 Difference]: Finished difference Result 357 states and 825 transitions. [2021-03-10 21:31:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:31:49,015 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:49,016 INFO L225 Difference]: With dead ends: 357 [2021-03-10 21:31:49,016 INFO L226 Difference]: Without dead ends: 357 [2021-03-10 21:31:49,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:31:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-03-10 21:31:49,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-03-10 21:31:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-03-10 21:31:49,020 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-03-10 21:31:49,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:49,020 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-03-10 21:31:49,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-03-10 21:31:49,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:49,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:49,020 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:49,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7051 [2021-03-10 21:31:49,227 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:49,227 INFO L82 PathProgramCache]: Analyzing trace with hash -821225785, now seen corresponding path program 72 times [2021-03-10 21:31:49,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:49,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628190698] [2021-03-10 21:31:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:49,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628190698] [2021-03-10 21:31:49,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786564086] [2021-03-10 21:31:49,256 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 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 [2021-03-10 21:31:49,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:31:49,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:49,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:49,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:49,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:49,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:31:49,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229530052] [2021-03-10 21:31:49,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:49,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:49,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:49,306 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:49,361 INFO L93 Difference]: Finished difference Result 374 states and 857 transitions. [2021-03-10 21:31:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:31:49,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:49,362 INFO L225 Difference]: With dead ends: 374 [2021-03-10 21:31:49,362 INFO L226 Difference]: Without dead ends: 374 [2021-03-10 21:31:49,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:31:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-03-10 21:31:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 189. [2021-03-10 21:31:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-03-10 21:31:49,365 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-03-10 21:31:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:49,365 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-03-10 21:31:49,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-03-10 21:31:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:49,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:49,366 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:49,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7052,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:49,566 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1971772518, now seen corresponding path program 73 times [2021-03-10 21:31:49,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:49,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577512128] [2021-03-10 21:31:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:49,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577512128] [2021-03-10 21:31:49,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024581374] [2021-03-10 21:31:49,715 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:31:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:49,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:49,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:49,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:49,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:50,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:50,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:50,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:50,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:31:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:50,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:50,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:50,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416395186] [2021-03-10 21:31:50,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:50,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:50,019 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:50,250 INFO L93 Difference]: Finished difference Result 202 states and 560 transitions. [2021-03-10 21:31:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:31:50,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:50,251 INFO L225 Difference]: With dead ends: 202 [2021-03-10 21:31:50,251 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 21:31:50,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 370.1ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:31:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 21:31:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-03-10 21:31:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-03-10 21:31:50,261 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-03-10 21:31:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:50,261 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-03-10 21:31:50,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-03-10 21:31:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:50,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:50,262 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:50,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7053 [2021-03-10 21:31:50,471 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1112897988, now seen corresponding path program 74 times [2021-03-10 21:31:50,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:50,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354980504] [2021-03-10 21:31:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:50,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354980504] [2021-03-10 21:31:50,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157272291] [2021-03-10 21:31:50,601 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 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 [2021-03-10 21:31:50,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:50,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:50,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:50,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:50,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-03-10 21:31:50,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:31:51,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:51,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:51,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:51,160 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:31:51,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:51,161 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-03-10 21:31:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:51,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:51,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:51,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101361399] [2021-03-10 21:31:51,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:51,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:51,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:51,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:51,186 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:51,503 INFO L93 Difference]: Finished difference Result 227 states and 606 transitions. [2021-03-10 21:31:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:51,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:51,505 INFO L225 Difference]: With dead ends: 227 [2021-03-10 21:31:51,505 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:31:51,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:31:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:31:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 189. [2021-03-10 21:31:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-03-10 21:31:51,507 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-03-10 21:31:51,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:51,507 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-03-10 21:31:51,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-03-10 21:31:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:51,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:51,508 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:51,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7096 [2021-03-10 21:31:51,708 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1195798685, now seen corresponding path program 75 times [2021-03-10 21:31:51,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:51,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922417506] [2021-03-10 21:31:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:51,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922417506] [2021-03-10 21:31:51,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124155811] [2021-03-10 21:31:51,737 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 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 [2021-03-10 21:31:51,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:51,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:51,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:51,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:51,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:51,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:31:51,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644515580] [2021-03-10 21:31:51,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:51,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:51,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:51,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:51,779 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:51,833 INFO L93 Difference]: Finished difference Result 377 states and 865 transitions. [2021-03-10 21:31:51,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:31:51,834 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:51,835 INFO L225 Difference]: With dead ends: 377 [2021-03-10 21:31:51,835 INFO L226 Difference]: Without dead ends: 377 [2021-03-10 21:31:51,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:31:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-03-10 21:31:51,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 197. [2021-03-10 21:31:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-03-10 21:31:51,848 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-03-10 21:31:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:51,848 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-03-10 21:31:51,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-03-10 21:31:51,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:51,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:51,848 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:52,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7284,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:52,055 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:52,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:52,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1733654263, now seen corresponding path program 76 times [2021-03-10 21:31:52,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:52,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029804998] [2021-03-10 21:31:52,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:52,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029804998] [2021-03-10 21:31:52,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840464054] [2021-03-10 21:31:52,084 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 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 [2021-03-10 21:31:52,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:52,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:52,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:52,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:52,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:52,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:31:52,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455045678] [2021-03-10 21:31:52,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:31:52,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:52,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:31:52,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:31:52,128 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:52,213 INFO L93 Difference]: Finished difference Result 413 states and 931 transitions. [2021-03-10 21:31:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:31:52,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:52,214 INFO L225 Difference]: With dead ends: 413 [2021-03-10 21:31:52,214 INFO L226 Difference]: Without dead ends: 413 [2021-03-10 21:31:52,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-03-10 21:31:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 197. [2021-03-10 21:31:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.872448979591837) internal successors, (563), 196 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 563 transitions. [2021-03-10 21:31:52,217 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 563 transitions. Word has length 17 [2021-03-10 21:31:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:52,217 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 563 transitions. [2021-03-10 21:31:52,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 563 transitions. [2021-03-10 21:31:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:52,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:52,218 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:52,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7285,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:52,432 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash 426443908, now seen corresponding path program 77 times [2021-03-10 21:31:52,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:52,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988892792] [2021-03-10 21:31:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:52,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988892792] [2021-03-10 21:31:52,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556119175] [2021-03-10 21:31:52,565 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 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 [2021-03-10 21:31:52,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:31:52,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:52,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:52,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:52,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:52,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:52,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:52,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:52,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:31:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:52,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:52,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:52,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054854616] [2021-03-10 21:31:52,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:52,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:52,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:52,846 INFO L87 Difference]: Start difference. First operand 197 states and 563 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:53,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:53,149 INFO L93 Difference]: Finished difference Result 211 states and 586 transitions. [2021-03-10 21:31:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:31:53,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:53,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:53,150 INFO L225 Difference]: With dead ends: 211 [2021-03-10 21:31:53,150 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 21:31:53,150 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 334.2ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:31:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 21:31:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2021-03-10 21:31:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-03-10 21:31:53,155 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-03-10 21:31:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:53,155 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-03-10 21:31:53,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-03-10 21:31:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:53,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:53,155 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:53,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7286,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:53,356 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1285318438, now seen corresponding path program 78 times [2021-03-10 21:31:53,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:53,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911993596] [2021-03-10 21:31:53,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:53,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911993596] [2021-03-10 21:31:53,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964397896] [2021-03-10 21:31:53,487 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 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 [2021-03-10 21:31:53,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:31:53,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:53,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:53,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:53,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-03-10 21:31:53,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-03-10 21:31:54,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:54,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:54,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:54,108 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-03-10 21:31:54,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:54,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-03-10 21:31:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:54,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:54,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:54,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251527464] [2021-03-10 21:31:54,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:54,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:54,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:54,135 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:54,474 INFO L93 Difference]: Finished difference Result 244 states and 655 transitions. [2021-03-10 21:31:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:54,474 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:54,475 INFO L225 Difference]: With dead ends: 244 [2021-03-10 21:31:54,475 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:31:54,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 381.5ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:31:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 197. [2021-03-10 21:31:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-03-10 21:31:54,477 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-03-10 21:31:54,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:54,477 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-03-10 21:31:54,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,477 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-03-10 21:31:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:54,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:54,478 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:54,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7330 [2021-03-10 21:31:54,687 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:54,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:54,687 INFO L82 PathProgramCache]: Analyzing trace with hash -163096607, now seen corresponding path program 79 times [2021-03-10 21:31:54,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:54,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528896431] [2021-03-10 21:31:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:54,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528896431] [2021-03-10 21:31:54,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661544631] [2021-03-10 21:31:54,717 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 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 [2021-03-10 21:31:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:54,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:54,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:54,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:54,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:31:54,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878029763] [2021-03-10 21:31:54,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:31:54,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:54,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:31:54,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:31:54,761 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:54,846 INFO L93 Difference]: Finished difference Result 427 states and 977 transitions. [2021-03-10 21:31:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:31:54,847 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:54,848 INFO L225 Difference]: With dead ends: 427 [2021-03-10 21:31:54,848 INFO L226 Difference]: Without dead ends: 427 [2021-03-10 21:31:54,848 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-03-10 21:31:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 207. [2021-03-10 21:31:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.907766990291262) internal successors, (599), 206 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 599 transitions. [2021-03-10 21:31:54,851 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 599 transitions. Word has length 17 [2021-03-10 21:31:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:54,851 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 599 transitions. [2021-03-10 21:31:54,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 599 transitions. [2021-03-10 21:31:54,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:54,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:54,852 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:55,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7526,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:55,052 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:55,052 INFO L82 PathProgramCache]: Analyzing trace with hash -669442873, now seen corresponding path program 80 times [2021-03-10 21:31:55,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:55,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565927727] [2021-03-10 21:31:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:55,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565927727] [2021-03-10 21:31:55,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960079621] [2021-03-10 21:31:55,085 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 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 [2021-03-10 21:31:55,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:55,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:55,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:55,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:55,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:31:55,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698908793] [2021-03-10 21:31:55,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:31:55,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:55,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:31:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:31:55,130 INFO L87 Difference]: Start difference. First operand 207 states and 599 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:55,244 INFO L93 Difference]: Finished difference Result 378 states and 905 transitions. [2021-03-10 21:31:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:31:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:55,245 INFO L225 Difference]: With dead ends: 378 [2021-03-10 21:31:55,245 INFO L226 Difference]: Without dead ends: 378 [2021-03-10 21:31:55,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-03-10 21:31:55,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 204. [2021-03-10 21:31:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-03-10 21:31:55,248 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-03-10 21:31:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:55,248 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-03-10 21:31:55,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-03-10 21:31:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:55,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:55,249 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:55,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7527 [2021-03-10 21:31:55,449 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:55,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:55,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1756709082, now seen corresponding path program 81 times [2021-03-10 21:31:55,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:55,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349290873] [2021-03-10 21:31:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:55,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349290873] [2021-03-10 21:31:55,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946212153] [2021-03-10 21:31:55,583 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 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 [2021-03-10 21:31:55,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:55,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:55,603 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:55,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:55,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:55,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:55,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:55,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:55,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:55,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:31:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:55,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:55,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:55,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539512799] [2021-03-10 21:31:55,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:55,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:55,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:55,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:55,937 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:56,161 INFO L93 Difference]: Finished difference Result 222 states and 624 transitions. [2021-03-10 21:31:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:56,162 INFO L225 Difference]: With dead ends: 222 [2021-03-10 21:31:56,162 INFO L226 Difference]: Without dead ends: 213 [2021-03-10 21:31:56,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-10 21:31:56,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-03-10 21:31:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.9019607843137254) internal successors, (592), 204 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 592 transitions. [2021-03-10 21:31:56,165 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 592 transitions. Word has length 17 [2021-03-10 21:31:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:56,165 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 592 transitions. [2021-03-10 21:31:56,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 592 transitions. [2021-03-10 21:31:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:56,165 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:56,165 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:56,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7528,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:56,366 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:56,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1679383684, now seen corresponding path program 82 times [2021-03-10 21:31:56,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:56,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696818262] [2021-03-10 21:31:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:56,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696818262] [2021-03-10 21:31:56,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516086198] [2021-03-10 21:31:56,506 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 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 [2021-03-10 21:31:56,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:56,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:56,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:56,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:56,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-03-10 21:31:56,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-03-10 21:31:56,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:56,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:57,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:57,029 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-03-10 21:31:57,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:31:57,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-03-10 21:31:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:57,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:57,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:57,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156651175] [2021-03-10 21:31:57,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:57,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:57,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:57,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:57,055 INFO L87 Difference]: Start difference. First operand 205 states and 592 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:57,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:57,374 INFO L93 Difference]: Finished difference Result 256 states and 697 transitions. [2021-03-10 21:31:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:31:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:57,375 INFO L225 Difference]: With dead ends: 256 [2021-03-10 21:31:57,375 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 21:31:57,375 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:31:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 21:31:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 204. [2021-03-10 21:31:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-03-10 21:31:57,378 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-03-10 21:31:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:57,378 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-03-10 21:31:57,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-03-10 21:31:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:57,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:57,378 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:57,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7606,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:57,591 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:57,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:57,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1604794505, now seen corresponding path program 83 times [2021-03-10 21:31:57,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:57,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923479050] [2021-03-10 21:31:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:57,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923479050] [2021-03-10 21:31:57,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51522466] [2021-03-10 21:31:57,617 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 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 [2021-03-10 21:31:57,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:31:57,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:57,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:57,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:31:57,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:57,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:31:57,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871327042] [2021-03-10 21:31:57,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:31:57,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:31:57,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:31:57,658 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:57,690 INFO L93 Difference]: Finished difference Result 345 states and 847 transitions. [2021-03-10 21:31:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:31:57,691 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:57,692 INFO L225 Difference]: With dead ends: 345 [2021-03-10 21:31:57,692 INFO L226 Difference]: Without dead ends: 345 [2021-03-10 21:31:57,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-03-10 21:31:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 227. [2021-03-10 21:31:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.938053097345133) internal successors, (664), 226 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 664 transitions. [2021-03-10 21:31:57,695 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 664 transitions. Word has length 17 [2021-03-10 21:31:57,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:57,695 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 664 transitions. [2021-03-10 21:31:57,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 664 transitions. [2021-03-10 21:31:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:57,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:57,695 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:57,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7767,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:57,907 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash 629312989, now seen corresponding path program 84 times [2021-03-10 21:31:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:57,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211490254] [2021-03-10 21:31:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:57,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211490254] [2021-03-10 21:31:57,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016673098] [2021-03-10 21:31:57,943 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 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 [2021-03-10 21:31:57,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:31:57,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:57,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:57,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:57,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:57,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:31:57,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030282660] [2021-03-10 21:31:57,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:31:57,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:31:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:31:57,987 INFO L87 Difference]: Start difference. First operand 227 states and 664 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:58,043 INFO L93 Difference]: Finished difference Result 369 states and 882 transitions. [2021-03-10 21:31:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:31:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:58,045 INFO L225 Difference]: With dead ends: 369 [2021-03-10 21:31:58,045 INFO L226 Difference]: Without dead ends: 369 [2021-03-10 21:31:58,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:31:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-03-10 21:31:58,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 215. [2021-03-10 21:31:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-03-10 21:31:58,048 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 17 [2021-03-10 21:31:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:58,048 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-03-10 21:31:58,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-03-10 21:31:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:58,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:58,049 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:58,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7768,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:58,264 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1167168567, now seen corresponding path program 85 times [2021-03-10 21:31:58,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:58,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367523471] [2021-03-10 21:31:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:58,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367523471] [2021-03-10 21:31:58,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286369458] [2021-03-10 21:31:58,295 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 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 [2021-03-10 21:31:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:58,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:58,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:58,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:58,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:31:58,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117121283] [2021-03-10 21:31:58,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:31:58,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:58,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:31:58,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:31:58,340 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:58,421 INFO L93 Difference]: Finished difference Result 388 states and 893 transitions. [2021-03-10 21:31:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:31:58,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:58,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:58,422 INFO L225 Difference]: With dead ends: 388 [2021-03-10 21:31:58,422 INFO L226 Difference]: Without dead ends: 388 [2021-03-10 21:31:58,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-03-10 21:31:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 204. [2021-03-10 21:31:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.896551724137931) internal successors, (588), 203 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 588 transitions. [2021-03-10 21:31:58,425 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 588 transitions. Word has length 17 [2021-03-10 21:31:58,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:58,425 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 588 transitions. [2021-03-10 21:31:58,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,425 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 588 transitions. [2021-03-10 21:31:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:58,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:58,425 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:58,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7769,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:58,627 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:58,627 INFO L82 PathProgramCache]: Analyzing trace with hash 660822301, now seen corresponding path program 86 times [2021-03-10 21:31:58,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:58,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149222103] [2021-03-10 21:31:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:58,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149222103] [2021-03-10 21:31:58,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765615639] [2021-03-10 21:31:58,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:31:58,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:58,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:58,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:58,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:58,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:31:58,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982975239] [2021-03-10 21:31:58,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:31:58,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:58,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:31:58,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:31:58,713 INFO L87 Difference]: Start difference. First operand 204 states and 588 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:58,824 INFO L93 Difference]: Finished difference Result 319 states and 762 transitions. [2021-03-10 21:31:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:31:58,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:58,825 INFO L225 Difference]: With dead ends: 319 [2021-03-10 21:31:58,825 INFO L226 Difference]: Without dead ends: 319 [2021-03-10 21:31:58,825 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:58,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-03-10 21:31:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 198. [2021-03-10 21:31:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.8934010152284264) internal successors, (570), 197 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 570 transitions. [2021-03-10 21:31:58,828 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 570 transitions. Word has length 17 [2021-03-10 21:31:58,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:58,828 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 570 transitions. [2021-03-10 21:31:58,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 570 transitions. [2021-03-10 21:31:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:58,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:58,828 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:59,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7770 [2021-03-10 21:31:59,044 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:59,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:59,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2143957239, now seen corresponding path program 87 times [2021-03-10 21:31:59,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:59,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72986543] [2021-03-10 21:31:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:59,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72986543] [2021-03-10 21:31:59,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088263054] [2021-03-10 21:31:59,075 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 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 [2021-03-10 21:31:59,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:31:59,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:59,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:31:59,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:59,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:59,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:31:59,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917477035] [2021-03-10 21:31:59,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:31:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:31:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:31:59,120 INFO L87 Difference]: Start difference. First operand 198 states and 570 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:59,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:59,249 INFO L93 Difference]: Finished difference Result 345 states and 840 transitions. [2021-03-10 21:31:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:59,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:31:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:59,249 INFO L225 Difference]: With dead ends: 345 [2021-03-10 21:31:59,250 INFO L226 Difference]: Without dead ends: 345 [2021-03-10 21:31:59,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-03-10 21:31:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 202. [2021-03-10 21:31:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8955223880597014) internal successors, (582), 201 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 582 transitions. [2021-03-10 21:31:59,252 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 582 transitions. Word has length 17 [2021-03-10 21:31:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:59,252 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 582 transitions. [2021-03-10 21:31:59,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 582 transitions. [2021-03-10 21:31:59,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:31:59,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:59,253 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:59,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7771,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:59,453 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:59,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:59,453 INFO L82 PathProgramCache]: Analyzing trace with hash 45256516, now seen corresponding path program 88 times [2021-03-10 21:31:59,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:59,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472067129] [2021-03-10 21:31:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:59,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472067129] [2021-03-10 21:31:59,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934014260] [2021-03-10 21:31:59,590 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 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 [2021-03-10 21:31:59,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:59,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:59,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:31:59,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:59,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:59,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:31:59,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:59,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:59,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:59,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:31:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:59,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:59,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:31:59,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739657154] [2021-03-10 21:31:59,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:31:59,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:59,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:31:59,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:59,888 INFO L87 Difference]: Start difference. First operand 202 states and 582 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:00,131 INFO L93 Difference]: Finished difference Result 234 states and 664 transitions. [2021-03-10 21:32:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:00,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:32:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:00,132 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:32:00,132 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 21:32:00,132 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 21:32:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2021-03-10 21:32:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.928909952606635) internal successors, (618), 211 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 618 transitions. [2021-03-10 21:32:00,134 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 618 transitions. Word has length 17 [2021-03-10 21:32:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:00,134 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 618 transitions. [2021-03-10 21:32:00,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 618 transitions. [2021-03-10 21:32:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:32:00,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:00,135 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:00,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7772 [2021-03-10 21:32:00,347 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:00,347 INFO L82 PathProgramCache]: Analyzing trace with hash 904131046, now seen corresponding path program 89 times [2021-03-10 21:32:00,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:00,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382691330] [2021-03-10 21:32:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:00,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382691330] [2021-03-10 21:32:00,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94657751] [2021-03-10 21:32:00,482 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 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 [2021-03-10 21:32:00,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:00,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:00,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:00,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:00,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:00,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-03-10 21:32:00,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-03-10 21:32:00,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:00,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:32:01,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:01,122 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-03-10 21:32:01,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:01,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-03-10 21:32:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:01,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:01,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:01,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216058843] [2021-03-10 21:32:01,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:01,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:01,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:01,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:01,150 INFO L87 Difference]: Start difference. First operand 212 states and 618 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:01,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:01,574 INFO L93 Difference]: Finished difference Result 272 states and 753 transitions. [2021-03-10 21:32:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:01,575 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:32:01,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:01,575 INFO L225 Difference]: With dead ends: 272 [2021-03-10 21:32:01,575 INFO L226 Difference]: Without dead ends: 262 [2021-03-10 21:32:01,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-03-10 21:32:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 212. [2021-03-10 21:32:01,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.933649289099526) internal successors, (619), 211 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 619 transitions. [2021-03-10 21:32:01,578 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 619 transitions. Word has length 17 [2021-03-10 21:32:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:01,578 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 619 transitions. [2021-03-10 21:32:01,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 619 transitions. [2021-03-10 21:32:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:32:01,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:01,578 INFO L519 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:01,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7834,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:01,791 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:01,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:01,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1680222942, now seen corresponding path program 90 times [2021-03-10 21:32:01,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:01,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798179107] [2021-03-10 21:32:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:01,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798179107] [2021-03-10 21:32:01,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193646529] [2021-03-10 21:32:01,933 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 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 [2021-03-10 21:32:01,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:32:01,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:01,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:32:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:02,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:02,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-03-10 21:32:02,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 21:32:02,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:02,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:32:02,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:02,542 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-03-10 21:32:02,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:32:02,543 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-03-10 21:32:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:02,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:02,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:02,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18419294] [2021-03-10 21:32:02,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:02,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:02,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:02,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:02,570 INFO L87 Difference]: Start difference. First operand 212 states and 619 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:03,257 INFO L93 Difference]: Finished difference Result 304 states and 812 transitions. [2021-03-10 21:32:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:32:03,257 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:32:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:03,258 INFO L225 Difference]: With dead ends: 304 [2021-03-10 21:32:03,258 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 21:32:03,258 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 568.5ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:32:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 21:32:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 213. [2021-03-10 21:32:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.938679245283019) internal successors, (623), 212 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 623 transitions. [2021-03-10 21:32:03,260 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 623 transitions. Word has length 17 [2021-03-10 21:32:03,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:03,261 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 623 transitions. [2021-03-10 21:32:03,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,261 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 623 transitions. [2021-03-10 21:32:03,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:32:03,261 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:03,261 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:03,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8050 [2021-03-10 21:32:03,461 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:03,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:03,462 INFO L82 PathProgramCache]: Analyzing trace with hash 978720225, now seen corresponding path program 91 times [2021-03-10 21:32:03,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:03,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657007233] [2021-03-10 21:32:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:03,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657007233] [2021-03-10 21:32:03,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045044685] [2021-03-10 21:32:03,509 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 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 [2021-03-10 21:32:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:03,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:32:03,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:03,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:03,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:03,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804656917] [2021-03-10 21:32:03,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:03,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:03,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:03,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:03,554 INFO L87 Difference]: Start difference. First operand 213 states and 623 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:03,604 INFO L93 Difference]: Finished difference Result 364 states and 870 transitions. [2021-03-10 21:32:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:32:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:32:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:03,605 INFO L225 Difference]: With dead ends: 364 [2021-03-10 21:32:03,605 INFO L226 Difference]: Without dead ends: 364 [2021-03-10 21:32:03,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-03-10 21:32:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 220. [2021-03-10 21:32:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.954337899543379) internal successors, (647), 219 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 647 transitions. [2021-03-10 21:32:03,608 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 647 transitions. Word has length 17 [2021-03-10 21:32:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:03,608 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 647 transitions. [2021-03-10 21:32:03,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 647 transitions. [2021-03-10 21:32:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:32:03,609 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:03,609 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:03,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8248 [2021-03-10 21:32:03,823 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:03,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:03,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1082139577, now seen corresponding path program 92 times [2021-03-10 21:32:03,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:03,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861737426] [2021-03-10 21:32:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:03,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861737426] [2021-03-10 21:32:03,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851232842] [2021-03-10 21:32:03,865 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 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 [2021-03-10 21:32:03,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:03,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:03,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:32:03,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:03,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:03,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:03,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631342675] [2021-03-10 21:32:03,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:03,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:03,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:03,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:03,908 INFO L87 Difference]: Start difference. First operand 220 states and 647 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:03,965 INFO L93 Difference]: Finished difference Result 346 states and 892 transitions. [2021-03-10 21:32:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:32:03,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:32:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:03,966 INFO L225 Difference]: With dead ends: 346 [2021-03-10 21:32:03,966 INFO L226 Difference]: Without dead ends: 346 [2021-03-10 21:32:03,966 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:03,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-03-10 21:32:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 250. [2021-03-10 21:32:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9759036144578315) internal successors, (741), 249 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 741 transitions. [2021-03-10 21:32:03,969 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 741 transitions. Word has length 17 [2021-03-10 21:32:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:03,969 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 741 transitions. [2021-03-10 21:32:03,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 741 transitions. [2021-03-10 21:32:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:32:03,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:03,970 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:04,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8249,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:04,187 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash -544283999, now seen corresponding path program 93 times [2021-03-10 21:32:04,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:04,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31151038] [2021-03-10 21:32:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:04,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31151038] [2021-03-10 21:32:04,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011585153] [2021-03-10 21:32:04,221 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 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 [2021-03-10 21:32:04,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:04,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:04,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:32:04,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:04,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:04,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:32:04,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743566795] [2021-03-10 21:32:04,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:04,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:04,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:04,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:04,276 INFO L87 Difference]: Start difference. First operand 250 states and 741 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:04,360 INFO L93 Difference]: Finished difference Result 372 states and 930 transitions. [2021-03-10 21:32:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:32:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:32:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:04,361 INFO L225 Difference]: With dead ends: 372 [2021-03-10 21:32:04,361 INFO L226 Difference]: Without dead ends: 372 [2021-03-10 21:32:04,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-03-10 21:32:04,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 247. [2021-03-10 21:32:04,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9715447154471546) internal successors, (731), 246 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 731 transitions. [2021-03-10 21:32:04,364 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 731 transitions. Word has length 17 [2021-03-10 21:32:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:04,364 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 731 transitions. [2021-03-10 21:32:04,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 731 transitions. [2021-03-10 21:32:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:32:04,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:04,365 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:04,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8250,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:04,579 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:04,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:04,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1050630265, now seen corresponding path program 94 times [2021-03-10 21:32:04,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:04,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307259012] [2021-03-10 21:32:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:04,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307259012] [2021-03-10 21:32:04,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502688772] [2021-03-10 21:32:04,613 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 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 [2021-03-10 21:32:04,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:04,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:04,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:32:04,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:04,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:04,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:32:04,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901678443] [2021-03-10 21:32:04,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:04,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:04,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:04,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:04,659 INFO L87 Difference]: Start difference. First operand 247 states and 731 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:04,761 INFO L93 Difference]: Finished difference Result 335 states and 866 transitions. [2021-03-10 21:32:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:32:04,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:32:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:04,762 INFO L225 Difference]: With dead ends: 335 [2021-03-10 21:32:04,762 INFO L226 Difference]: Without dead ends: 335 [2021-03-10 21:32:04,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:04,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-03-10 21:32:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 244. [2021-03-10 21:32:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-03-10 21:32:04,765 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-03-10 21:32:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:04,765 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-03-10 21:32:04,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-03-10 21:32:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:32:04,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:04,765 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:04,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8251,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:04,966 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:04,966 INFO L82 PathProgramCache]: Analyzing trace with hash 432504673, now seen corresponding path program 95 times [2021-03-10 21:32:04,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:04,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110420591] [2021-03-10 21:32:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:05,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110420591] [2021-03-10 21:32:05,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309426321] [2021-03-10 21:32:05,011 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 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 [2021-03-10 21:32:05,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:05,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:05,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:32:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:05,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:05,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:32:05,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468417936] [2021-03-10 21:32:05,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:05,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:05,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:05,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:05,058 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:05,172 INFO L93 Difference]: Finished difference Result 346 states and 896 transitions. [2021-03-10 21:32:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:32:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:05,173 INFO L225 Difference]: With dead ends: 346 [2021-03-10 21:32:05,173 INFO L226 Difference]: Without dead ends: 346 [2021-03-10 21:32:05,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-03-10 21:32:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 244. [2021-03-10 21:32:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-03-10 21:32:05,176 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-03-10 21:32:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:05,176 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-03-10 21:32:05,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-03-10 21:32:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:32:05,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:05,176 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:05,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8252,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:05,391 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:05,391 INFO L82 PathProgramCache]: Analyzing trace with hash -834952505, now seen corresponding path program 96 times [2021-03-10 21:32:05,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:05,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313841117] [2021-03-10 21:32:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:05,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313841117] [2021-03-10 21:32:05,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541372263] [2021-03-10 21:32:05,429 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 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 [2021-03-10 21:32:05,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:05,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:05,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:32:05,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:05,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:05,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:32:05,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990370797] [2021-03-10 21:32:05,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:05,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:05,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:05,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:05,474 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:05,583 INFO L93 Difference]: Finished difference Result 385 states and 1019 transitions. [2021-03-10 21:32:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:32:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:05,584 INFO L225 Difference]: With dead ends: 385 [2021-03-10 21:32:05,584 INFO L226 Difference]: Without dead ends: 385 [2021-03-10 21:32:05,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-03-10 21:32:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 252. [2021-03-10 21:32:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9721115537848606) internal successors, (746), 251 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 746 transitions. [2021-03-10 21:32:05,587 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 746 transitions. Word has length 17 [2021-03-10 21:32:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:05,587 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 746 transitions. [2021-03-10 21:32:05,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 746 transitions. [2021-03-10 21:32:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:05,587 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:05,587 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:05,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8253 [2021-03-10 21:32:05,788 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:05,788 INFO L82 PathProgramCache]: Analyzing trace with hash -702501620, now seen corresponding path program 97 times [2021-03-10 21:32:05,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:05,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850925498] [2021-03-10 21:32:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:05,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850925498] [2021-03-10 21:32:05,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531754824] [2021-03-10 21:32:05,873 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 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 [2021-03-10 21:32:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:05,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:05,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:06,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:06,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:06,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:06,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:06,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:06,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:06,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:06,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:06,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758133112] [2021-03-10 21:32:06,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:06,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:06,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:06,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:06,623 INFO L87 Difference]: Start difference. First operand 252 states and 746 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:06,897 INFO L93 Difference]: Finished difference Result 306 states and 891 transitions. [2021-03-10 21:32:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:06,897 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:06,898 INFO L225 Difference]: With dead ends: 306 [2021-03-10 21:32:06,898 INFO L226 Difference]: Without dead ends: 301 [2021-03-10 21:32:06,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-03-10 21:32:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 272. [2021-03-10 21:32:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-03-10 21:32:06,901 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-03-10 21:32:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:06,901 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-03-10 21:32:06,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-03-10 21:32:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:06,901 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:06,902 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:07,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8254,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:07,102 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:07,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:07,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1857651606, now seen corresponding path program 98 times [2021-03-10 21:32:07,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:07,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433146205] [2021-03-10 21:32:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:07,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433146205] [2021-03-10 21:32:07,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649252094] [2021-03-10 21:32:07,189 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 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 [2021-03-10 21:32:07,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:07,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:07,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:07,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:07,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:07,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:07,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:07,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:07,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:07,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:07,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:07,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539235504] [2021-03-10 21:32:07,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:07,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:07,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:07,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:07,685 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:08,282 INFO L93 Difference]: Finished difference Result 402 states and 1031 transitions. [2021-03-10 21:32:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:32:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:08,283 INFO L225 Difference]: With dead ends: 402 [2021-03-10 21:32:08,283 INFO L226 Difference]: Without dead ends: 392 [2021-03-10 21:32:08,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:32:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-03-10 21:32:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 272. [2021-03-10 21:32:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-03-10 21:32:08,286 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-03-10 21:32:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:08,286 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-03-10 21:32:08,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-03-10 21:32:08,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:08,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:08,287 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:08,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8470 [2021-03-10 21:32:08,487 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:08,487 INFO L82 PathProgramCache]: Analyzing trace with hash 801291561, now seen corresponding path program 99 times [2021-03-10 21:32:08,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:08,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578687331] [2021-03-10 21:32:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:08,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578687331] [2021-03-10 21:32:08,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806714374] [2021-03-10 21:32:08,522 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 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 [2021-03-10 21:32:08,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:32:08,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:08,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:08,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:08,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:08,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:32:08,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716965499] [2021-03-10 21:32:08,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:08,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:08,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:08,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:08,571 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:08,621 INFO L93 Difference]: Finished difference Result 460 states and 1135 transitions. [2021-03-10 21:32:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:32:08,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:08,622 INFO L225 Difference]: With dead ends: 460 [2021-03-10 21:32:08,622 INFO L226 Difference]: Without dead ends: 460 [2021-03-10 21:32:08,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-03-10 21:32:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 274. [2021-03-10 21:32:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9963369963369964) internal successors, (818), 273 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 818 transitions. [2021-03-10 21:32:08,625 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 818 transitions. Word has length 18 [2021-03-10 21:32:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:08,625 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 818 transitions. [2021-03-10 21:32:08,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 818 transitions. [2021-03-10 21:32:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:08,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:08,626 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:08,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8577 [2021-03-10 21:32:08,826 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:08,827 INFO L82 PathProgramCache]: Analyzing trace with hash -640313607, now seen corresponding path program 100 times [2021-03-10 21:32:08,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:08,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872030333] [2021-03-10 21:32:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:08,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872030333] [2021-03-10 21:32:08,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542384594] [2021-03-10 21:32:08,860 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 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 [2021-03-10 21:32:08,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:08,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:08,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:08,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:08,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:08,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:32:08,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483454804] [2021-03-10 21:32:08,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:08,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:08,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:08,907 INFO L87 Difference]: Start difference. First operand 274 states and 818 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:08,971 INFO L93 Difference]: Finished difference Result 492 states and 1194 transitions. [2021-03-10 21:32:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:08,972 INFO L225 Difference]: With dead ends: 492 [2021-03-10 21:32:08,972 INFO L226 Difference]: Without dead ends: 492 [2021-03-10 21:32:08,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:32:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-03-10 21:32:08,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 276. [2021-03-10 21:32:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-03-10 21:32:08,975 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-03-10 21:32:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:08,975 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-03-10 21:32:08,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-03-10 21:32:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:08,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:08,976 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:09,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8578 [2021-03-10 21:32:09,187 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:09,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1790860340, now seen corresponding path program 101 times [2021-03-10 21:32:09,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:09,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648629002] [2021-03-10 21:32:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:09,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648629002] [2021-03-10 21:32:09,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179756794] [2021-03-10 21:32:09,287 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 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 [2021-03-10 21:32:09,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:09,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:09,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:09,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:09,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:09,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:09,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:09,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:09,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:09,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:09,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:09,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127476065] [2021-03-10 21:32:09,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:09,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:09,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:09,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:09,738 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:09,965 INFO L93 Difference]: Finished difference Result 323 states and 904 transitions. [2021-03-10 21:32:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:09,966 INFO L225 Difference]: With dead ends: 323 [2021-03-10 21:32:09,966 INFO L226 Difference]: Without dead ends: 318 [2021-03-10 21:32:09,966 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-03-10 21:32:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2021-03-10 21:32:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-03-10 21:32:09,969 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-03-10 21:32:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:09,969 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-03-10 21:32:09,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-03-10 21:32:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:09,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:09,970 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:10,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8579,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:10,184 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:10,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2026934802, now seen corresponding path program 102 times [2021-03-10 21:32:10,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:10,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072909063] [2021-03-10 21:32:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:10,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072909063] [2021-03-10 21:32:10,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215605894] [2021-03-10 21:32:10,266 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 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 [2021-03-10 21:32:10,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:10,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:10,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:10,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:10,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:10,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:10,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:10,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:10,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:10,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:10,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:10,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712786742] [2021-03-10 21:32:10,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:10,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:10,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:10,765 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:11,096 INFO L93 Difference]: Finished difference Result 333 states and 930 transitions. [2021-03-10 21:32:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:11,097 INFO L225 Difference]: With dead ends: 333 [2021-03-10 21:32:11,097 INFO L226 Difference]: Without dead ends: 322 [2021-03-10 21:32:11,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:32:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-03-10 21:32:11,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 278. [2021-03-10 21:32:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9819494584837547) internal successors, (826), 277 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 826 transitions. [2021-03-10 21:32:11,100 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 826 transitions. Word has length 18 [2021-03-10 21:32:11,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:11,100 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 826 transitions. [2021-03-10 21:32:11,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:11,101 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 826 transitions. [2021-03-10 21:32:11,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:11,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:11,101 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:11,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8688 [2021-03-10 21:32:11,301 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:11,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1194947114, now seen corresponding path program 103 times [2021-03-10 21:32:11,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:11,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9926331] [2021-03-10 21:32:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:11,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9926331] [2021-03-10 21:32:11,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647188205] [2021-03-10 21:32:11,379 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 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 [2021-03-10 21:32:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:11,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:11,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:11,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:12,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:12,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:12,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:12,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:12,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:12,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:12,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60437828] [2021-03-10 21:32:12,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:12,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:12,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:12,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:12,026 INFO L87 Difference]: Start difference. First operand 278 states and 826 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:12,473 INFO L93 Difference]: Finished difference Result 351 states and 960 transitions. [2021-03-10 21:32:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:32:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:12,474 INFO L225 Difference]: With dead ends: 351 [2021-03-10 21:32:12,474 INFO L226 Difference]: Without dead ends: 338 [2021-03-10 21:32:12,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:12,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-03-10 21:32:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 280. [2021-03-10 21:32:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-03-10 21:32:12,485 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-03-10 21:32:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:12,485 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-03-10 21:32:12,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-03-10 21:32:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:12,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:12,486 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:12,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8797,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:12,691 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:12,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:12,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1914566441, now seen corresponding path program 104 times [2021-03-10 21:32:12,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:12,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362610608] [2021-03-10 21:32:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:12,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362610608] [2021-03-10 21:32:12,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291469115] [2021-03-10 21:32:12,730 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 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 [2021-03-10 21:32:12,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:12,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:12,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:12,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:12,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:12,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:12,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123405007] [2021-03-10 21:32:12,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:12,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:12,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:12,773 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:12,858 INFO L93 Difference]: Finished difference Result 527 states and 1263 transitions. [2021-03-10 21:32:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:32:12,858 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:12,859 INFO L225 Difference]: With dead ends: 527 [2021-03-10 21:32:12,859 INFO L226 Difference]: Without dead ends: 527 [2021-03-10 21:32:12,859 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-03-10 21:32:12,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 280. [2021-03-10 21:32:12,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-03-10 21:32:12,862 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-03-10 21:32:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:12,863 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-03-10 21:32:12,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-03-10 21:32:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:12,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:12,863 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:13,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8992,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:13,063 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash 607356086, now seen corresponding path program 105 times [2021-03-10 21:32:13,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:13,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962791802] [2021-03-10 21:32:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:13,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962791802] [2021-03-10 21:32:13,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370258471] [2021-03-10 21:32:13,155 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 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 [2021-03-10 21:32:13,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:13,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:13,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:13,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:13,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:13,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:13,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:13,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:13,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:13,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:13,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:13,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:13,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684154721] [2021-03-10 21:32:13,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:13,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:13,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:13,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:13,866 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:14,058 INFO L93 Difference]: Finished difference Result 307 states and 875 transitions. [2021-03-10 21:32:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:14,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:14,059 INFO L225 Difference]: With dead ends: 307 [2021-03-10 21:32:14,059 INFO L226 Difference]: Without dead ends: 302 [2021-03-10 21:32:14,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-03-10 21:32:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2021-03-10 21:32:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-03-10 21:32:14,062 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-03-10 21:32:14,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:14,062 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-03-10 21:32:14,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-03-10 21:32:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:14,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:14,062 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:14,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8993 [2021-03-10 21:32:14,263 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:14,263 INFO L82 PathProgramCache]: Analyzing trace with hash -520040007, now seen corresponding path program 106 times [2021-03-10 21:32:14,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:14,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892433720] [2021-03-10 21:32:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:14,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892433720] [2021-03-10 21:32:14,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656465223] [2021-03-10 21:32:14,292 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 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 [2021-03-10 21:32:14,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:14,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:14,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:14,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:14,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:14,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:14,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742649735] [2021-03-10 21:32:14,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:14,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:14,340 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:14,396 INFO L93 Difference]: Finished difference Result 474 states and 1151 transitions. [2021-03-10 21:32:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:32:14,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:14,397 INFO L225 Difference]: With dead ends: 474 [2021-03-10 21:32:14,397 INFO L226 Difference]: Without dead ends: 474 [2021-03-10 21:32:14,397 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-03-10 21:32:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 291. [2021-03-10 21:32:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.986206896551724) internal successors, (866), 290 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 866 transitions. [2021-03-10 21:32:14,401 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 866 transitions. Word has length 18 [2021-03-10 21:32:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:14,401 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 866 transitions. [2021-03-10 21:32:14,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 866 transitions. [2021-03-10 21:32:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:14,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:14,401 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:14,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9195,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:14,602 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:14,602 INFO L82 PathProgramCache]: Analyzing trace with hash -701803756, now seen corresponding path program 107 times [2021-03-10 21:32:14,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:14,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947245933] [2021-03-10 21:32:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:14,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947245933] [2021-03-10 21:32:14,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478167254] [2021-03-10 21:32:14,681 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 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 [2021-03-10 21:32:14,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:14,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:14,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:14,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:14,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:15,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:15,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:15,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:15,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:15,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:15,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:15,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180992542] [2021-03-10 21:32:15,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:15,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:15,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:15,171 INFO L87 Difference]: Start difference. First operand 291 states and 866 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:15,591 INFO L93 Difference]: Finished difference Result 373 states and 1019 transitions. [2021-03-10 21:32:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:15,592 INFO L225 Difference]: With dead ends: 373 [2021-03-10 21:32:15,592 INFO L226 Difference]: Without dead ends: 356 [2021-03-10 21:32:15,592 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:32:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-03-10 21:32:15,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 291. [2021-03-10 21:32:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-03-10 21:32:15,595 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 18 [2021-03-10 21:32:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:15,595 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-03-10 21:32:15,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-03-10 21:32:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:15,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:15,596 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:15,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9196,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:15,796 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash 17815571, now seen corresponding path program 108 times [2021-03-10 21:32:15,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:15,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840783386] [2021-03-10 21:32:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:15,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840783386] [2021-03-10 21:32:15,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933831339] [2021-03-10 21:32:15,832 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 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 [2021-03-10 21:32:15,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:15,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:15,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:15,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:15,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:15,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539610080] [2021-03-10 21:32:15,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:15,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:15,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:15,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:15,879 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:15,972 INFO L93 Difference]: Finished difference Result 514 states and 1221 transitions. [2021-03-10 21:32:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:32:15,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:15,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:15,973 INFO L225 Difference]: With dead ends: 514 [2021-03-10 21:32:15,973 INFO L226 Difference]: Without dead ends: 514 [2021-03-10 21:32:15,973 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-03-10 21:32:15,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 280. [2021-03-10 21:32:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.949820788530466) internal successors, (823), 279 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 823 transitions. [2021-03-10 21:32:15,976 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 823 transitions. Word has length 18 [2021-03-10 21:32:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:15,976 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 823 transitions. [2021-03-10 21:32:15,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 823 transitions. [2021-03-10 21:32:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:15,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:15,977 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:16,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9339,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:16,178 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash -488530695, now seen corresponding path program 109 times [2021-03-10 21:32:16,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:16,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711775427] [2021-03-10 21:32:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:16,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711775427] [2021-03-10 21:32:16,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114642670] [2021-03-10 21:32:16,223 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 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 [2021-03-10 21:32:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:16,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:16,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:16,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:16,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704933561] [2021-03-10 21:32:16,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:16,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:16,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:16,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:16,277 INFO L87 Difference]: Start difference. First operand 280 states and 823 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:16,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:16,414 INFO L93 Difference]: Finished difference Result 554 states and 1291 transitions. [2021-03-10 21:32:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:16,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:32:16,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:16,415 INFO L225 Difference]: With dead ends: 554 [2021-03-10 21:32:16,415 INFO L226 Difference]: Without dead ends: 554 [2021-03-10 21:32:16,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-03-10 21:32:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 283. [2021-03-10 21:32:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9397163120567376) internal successors, (829), 282 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 829 transitions. [2021-03-10 21:32:16,418 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 829 transitions. Word has length 18 [2021-03-10 21:32:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:16,418 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 829 transitions. [2021-03-10 21:32:16,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 829 transitions. [2021-03-10 21:32:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:16,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:16,419 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:16,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9340,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:16,619 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:16,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1937621260, now seen corresponding path program 110 times [2021-03-10 21:32:16,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:16,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433059632] [2021-03-10 21:32:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433059632] [2021-03-10 21:32:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487821249] [2021-03-10 21:32:16,721 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 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 [2021-03-10 21:32:16,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:16,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:16,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:16,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:16,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:16,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:17,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:17,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:17,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:17,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:17,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:17,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:17,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685324637] [2021-03-10 21:32:17,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:17,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:17,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:17,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:17,200 INFO L87 Difference]: Start difference. First operand 283 states and 829 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:17,441 INFO L93 Difference]: Finished difference Result 301 states and 868 transitions. [2021-03-10 21:32:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:17,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:17,442 INFO L225 Difference]: With dead ends: 301 [2021-03-10 21:32:17,442 INFO L226 Difference]: Without dead ends: 296 [2021-03-10 21:32:17,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:17,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-03-10 21:32:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-03-10 21:32:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.943462897526502) internal successors, (833), 283 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 833 transitions. [2021-03-10 21:32:17,445 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 833 transitions. Word has length 18 [2021-03-10 21:32:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:17,445 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 833 transitions. [2021-03-10 21:32:17,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 833 transitions. [2021-03-10 21:32:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:17,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:17,446 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:17,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9341 [2021-03-10 21:32:17,659 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1423882327, now seen corresponding path program 111 times [2021-03-10 21:32:17,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:17,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714392637] [2021-03-10 21:32:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:17,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714392637] [2021-03-10 21:32:17,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827331577] [2021-03-10 21:32:17,685 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 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 [2021-03-10 21:32:17,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:32:17,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:17,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:32:17,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:17,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:32:17,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429414284] [2021-03-10 21:32:17,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:32:17,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:17,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:32:17,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:32:17,730 INFO L87 Difference]: Start difference. First operand 284 states and 833 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:17,769 INFO L93 Difference]: Finished difference Result 435 states and 1110 transitions. [2021-03-10 21:32:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:32:17,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:17,770 INFO L225 Difference]: With dead ends: 435 [2021-03-10 21:32:17,770 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 21:32:17,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 21:32:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 311. [2021-03-10 21:32:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.967741935483871) internal successors, (920), 310 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 920 transitions. [2021-03-10 21:32:17,773 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 920 transitions. Word has length 18 [2021-03-10 21:32:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:17,774 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 920 transitions. [2021-03-10 21:32:17,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 920 transitions. [2021-03-10 21:32:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:17,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:17,774 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:17,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9501 [2021-03-10 21:32:17,983 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:17,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:17,983 INFO L82 PathProgramCache]: Analyzing trace with hash 810225167, now seen corresponding path program 112 times [2021-03-10 21:32:17,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:17,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247513547] [2021-03-10 21:32:17,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:18,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247513547] [2021-03-10 21:32:18,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271615920] [2021-03-10 21:32:18,013 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 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 [2021-03-10 21:32:18,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:18,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:18,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:18,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:18,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830465934] [2021-03-10 21:32:18,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:18,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:18,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:18,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:18,055 INFO L87 Difference]: Start difference. First operand 311 states and 920 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:18,105 INFO L93 Difference]: Finished difference Result 471 states and 1163 transitions. [2021-03-10 21:32:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:32:18,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:18,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:18,106 INFO L225 Difference]: With dead ends: 471 [2021-03-10 21:32:18,106 INFO L226 Difference]: Without dead ends: 471 [2021-03-10 21:32:18,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:18,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-03-10 21:32:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 309. [2021-03-10 21:32:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9642857142857144) internal successors, (913), 308 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 913 transitions. [2021-03-10 21:32:18,123 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 913 transitions. Word has length 18 [2021-03-10 21:32:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:18,123 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 913 transitions. [2021-03-10 21:32:18,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:18,124 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 913 transitions. [2021-03-10 21:32:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:18,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:18,124 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:18,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9502 [2021-03-10 21:32:18,338 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:18,338 INFO L82 PathProgramCache]: Analyzing trace with hash 628461418, now seen corresponding path program 113 times [2021-03-10 21:32:18,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:18,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070776403] [2021-03-10 21:32:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:18,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070776403] [2021-03-10 21:32:18,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620964930] [2021-03-10 21:32:18,407 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 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 [2021-03-10 21:32:18,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:18,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:18,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 21:32:18,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:18,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:18,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:18,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:18,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:18,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:18,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:18,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:18,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:18,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956696476] [2021-03-10 21:32:18,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:18,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:18,944 INFO L87 Difference]: Start difference. First operand 309 states and 913 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:19,222 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-03-10 21:32:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:19,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:19,224 INFO L225 Difference]: With dead ends: 383 [2021-03-10 21:32:19,224 INFO L226 Difference]: Without dead ends: 366 [2021-03-10 21:32:19,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-03-10 21:32:19,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 309. [2021-03-10 21:32:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-03-10 21:32:19,227 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-03-10 21:32:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:19,227 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-03-10 21:32:19,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-03-10 21:32:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:19,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:19,227 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:19,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9503,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:19,429 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1348080745, now seen corresponding path program 114 times [2021-03-10 21:32:19,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:19,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205723101] [2021-03-10 21:32:19,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:19,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205723101] [2021-03-10 21:32:19,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232407324] [2021-03-10 21:32:19,462 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 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 [2021-03-10 21:32:19,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:19,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:19,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:19,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:19,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:19,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:19,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274520331] [2021-03-10 21:32:19,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:19,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:19,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:19,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:19,507 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:19,597 INFO L93 Difference]: Finished difference Result 503 states and 1214 transitions. [2021-03-10 21:32:19,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:19,598 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:19,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:19,598 INFO L225 Difference]: With dead ends: 503 [2021-03-10 21:32:19,598 INFO L226 Difference]: Without dead ends: 503 [2021-03-10 21:32:19,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-03-10 21:32:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 309. [2021-03-10 21:32:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-03-10 21:32:19,602 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-03-10 21:32:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:19,602 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-03-10 21:32:19,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-03-10 21:32:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:19,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:19,603 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:19,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9641 [2021-03-10 21:32:19,817 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:19,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:19,818 INFO L82 PathProgramCache]: Analyzing trace with hash 841734479, now seen corresponding path program 115 times [2021-03-10 21:32:19,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:19,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693308852] [2021-03-10 21:32:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:19,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693308852] [2021-03-10 21:32:19,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715467994] [2021-03-10 21:32:19,853 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:32:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:19,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:19,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:19,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:19,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:19,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379524659] [2021-03-10 21:32:19,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:19,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:19,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:19,924 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:20,049 INFO L93 Difference]: Finished difference Result 546 states and 1298 transitions. [2021-03-10 21:32:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:20,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:32:20,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:20,050 INFO L225 Difference]: With dead ends: 546 [2021-03-10 21:32:20,050 INFO L226 Difference]: Without dead ends: 546 [2021-03-10 21:32:20,050 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-03-10 21:32:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2021-03-10 21:32:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-03-10 21:32:20,054 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-03-10 21:32:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:20,054 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-03-10 21:32:20,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-03-10 21:32:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:20,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:20,055 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:20,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9642 [2021-03-10 21:32:20,255 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1970097879, now seen corresponding path program 116 times [2021-03-10 21:32:20,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:20,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614205028] [2021-03-10 21:32:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:20,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614205028] [2021-03-10 21:32:20,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423663784] [2021-03-10 21:32:20,293 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 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 [2021-03-10 21:32:20,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:20,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:20,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:20,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:20,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:20,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282896627] [2021-03-10 21:32:20,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:20,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:20,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:20,347 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:20,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:20,513 INFO L93 Difference]: Finished difference Result 544 states and 1360 transitions. [2021-03-10 21:32:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:32:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:20,524 INFO L225 Difference]: With dead ends: 544 [2021-03-10 21:32:20,524 INFO L226 Difference]: Without dead ends: 544 [2021-03-10 21:32:20,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:32:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-10 21:32:20,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 311. [2021-03-10 21:32:20,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-03-10 21:32:20,528 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 18 [2021-03-10 21:32:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:20,528 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-03-10 21:32:20,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-03-10 21:32:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:20,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:20,528 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:20,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9643 [2021-03-10 21:32:20,729 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash 226168694, now seen corresponding path program 117 times [2021-03-10 21:32:20,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:20,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31973979] [2021-03-10 21:32:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:20,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31973979] [2021-03-10 21:32:20,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990263326] [2021-03-10 21:32:20,820 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 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 [2021-03-10 21:32:20,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:20,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:20,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:21,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:21,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:21,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:21,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:21,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:21,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:21,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:21,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:21,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445559275] [2021-03-10 21:32:21,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:21,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:21,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:21,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:21,270 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:21,610 INFO L93 Difference]: Finished difference Result 365 states and 1058 transitions. [2021-03-10 21:32:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:21,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:21,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:21,611 INFO L225 Difference]: With dead ends: 365 [2021-03-10 21:32:21,611 INFO L226 Difference]: Without dead ends: 360 [2021-03-10 21:32:21,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-03-10 21:32:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 329. [2021-03-10 21:32:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-03-10 21:32:21,614 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-03-10 21:32:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:21,614 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-03-10 21:32:21,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-03-10 21:32:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:21,615 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:21,615 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:21,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9644,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:21,815 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:21,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1499310764, now seen corresponding path program 118 times [2021-03-10 21:32:21,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:21,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581727267] [2021-03-10 21:32:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:21,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581727267] [2021-03-10 21:32:21,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531378907] [2021-03-10 21:32:21,906 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 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 [2021-03-10 21:32:21,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:21,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:21,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:21,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:22,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:22,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:22,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:22,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:22,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:22,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:22,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:22,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:22,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574825405] [2021-03-10 21:32:22,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:22,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:22,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:22,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:22,554 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:22,870 INFO L93 Difference]: Finished difference Result 375 states and 1069 transitions. [2021-03-10 21:32:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:22,871 INFO L225 Difference]: With dead ends: 375 [2021-03-10 21:32:22,871 INFO L226 Difference]: Without dead ends: 370 [2021-03-10 21:32:22,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-03-10 21:32:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 329. [2021-03-10 21:32:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-03-10 21:32:22,875 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-03-10 21:32:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:22,875 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-03-10 21:32:22,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-03-10 21:32:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:22,875 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:22,875 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:23,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9751,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:23,085 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1159632403, now seen corresponding path program 119 times [2021-03-10 21:32:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:23,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801730072] [2021-03-10 21:32:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:23,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801730072] [2021-03-10 21:32:23,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611074590] [2021-03-10 21:32:23,115 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 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 [2021-03-10 21:32:23,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:23,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:23,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:23,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:23,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:23,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064731875] [2021-03-10 21:32:23,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:23,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:23,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:23,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:23,164 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:23,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:23,216 INFO L93 Difference]: Finished difference Result 498 states and 1262 transitions. [2021-03-10 21:32:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:32:23,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:23,217 INFO L225 Difference]: With dead ends: 498 [2021-03-10 21:32:23,217 INFO L226 Difference]: Without dead ends: 498 [2021-03-10 21:32:23,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-10 21:32:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 300. [2021-03-10 21:32:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9732441471571907) internal successors, (889), 299 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 889 transitions. [2021-03-10 21:32:23,221 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 889 transitions. Word has length 18 [2021-03-10 21:32:23,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:23,221 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 889 transitions. [2021-03-10 21:32:23,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 889 transitions. [2021-03-10 21:32:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:23,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:23,222 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:23,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9951 [2021-03-10 21:32:23,435 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:23,435 INFO L82 PathProgramCache]: Analyzing trace with hash -901227399, now seen corresponding path program 120 times [2021-03-10 21:32:23,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:23,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899557432] [2021-03-10 21:32:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:23,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899557432] [2021-03-10 21:32:23,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633044051] [2021-03-10 21:32:23,465 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 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 [2021-03-10 21:32:23,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:23,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:23,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:23,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:23,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:23,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851350754] [2021-03-10 21:32:23,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:23,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:23,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:23,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:23,510 INFO L87 Difference]: Start difference. First operand 300 states and 889 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:23,553 INFO L93 Difference]: Finished difference Result 440 states and 1150 transitions. [2021-03-10 21:32:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:32:23,553 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:23,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:23,554 INFO L225 Difference]: With dead ends: 440 [2021-03-10 21:32:23,554 INFO L226 Difference]: Without dead ends: 440 [2021-03-10 21:32:23,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-03-10 21:32:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 328. [2021-03-10 21:32:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9877675840978593) internal successors, (977), 327 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 977 transitions. [2021-03-10 21:32:23,558 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 977 transitions. Word has length 18 [2021-03-10 21:32:23,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:23,558 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 977 transitions. [2021-03-10 21:32:23,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 977 transitions. [2021-03-10 21:32:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:23,558 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:23,558 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:23,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9952 [2021-03-10 21:32:23,758 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1082991148, now seen corresponding path program 121 times [2021-03-10 21:32:23,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:23,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522802403] [2021-03-10 21:32:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:23,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522802403] [2021-03-10 21:32:23,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963788547] [2021-03-10 21:32:23,831 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 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 [2021-03-10 21:32:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:23,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:23,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:24,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:24,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:24,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:24,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:24,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:24,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:24,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:24,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:24,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974301975] [2021-03-10 21:32:24,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:24,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:24,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:24,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:24,375 INFO L87 Difference]: Start difference. First operand 328 states and 977 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:24,664 INFO L93 Difference]: Finished difference Result 386 states and 1061 transitions. [2021-03-10 21:32:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:24,664 INFO L225 Difference]: With dead ends: 386 [2021-03-10 21:32:24,664 INFO L226 Difference]: Without dead ends: 373 [2021-03-10 21:32:24,665 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:32:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-03-10 21:32:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 328. [2021-03-10 21:32:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.984709480122324) internal successors, (976), 327 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 976 transitions. [2021-03-10 21:32:24,668 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 976 transitions. Word has length 18 [2021-03-10 21:32:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:24,668 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 976 transitions. [2021-03-10 21:32:24,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 976 transitions. [2021-03-10 21:32:24,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:24,672 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:24,672 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:24,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9953 [2021-03-10 21:32:24,875 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:24,876 INFO L82 PathProgramCache]: Analyzing trace with hash -363371821, now seen corresponding path program 122 times [2021-03-10 21:32:24,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:24,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070277733] [2021-03-10 21:32:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:24,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070277733] [2021-03-10 21:32:24,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460586514] [2021-03-10 21:32:24,910 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 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 [2021-03-10 21:32:24,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:24,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:24,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:24,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:24,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:24,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:24,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589065121] [2021-03-10 21:32:24,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:24,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:24,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:24,953 INFO L87 Difference]: Start difference. First operand 328 states and 976 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:25,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:25,022 INFO L93 Difference]: Finished difference Result 472 states and 1196 transitions. [2021-03-10 21:32:25,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:32:25,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:25,024 INFO L225 Difference]: With dead ends: 472 [2021-03-10 21:32:25,024 INFO L226 Difference]: Without dead ends: 472 [2021-03-10 21:32:25,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-03-10 21:32:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2021-03-10 21:32:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9710610932475885) internal successors, (924), 311 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 924 transitions. [2021-03-10 21:32:25,027 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 924 transitions. Word has length 18 [2021-03-10 21:32:25,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:25,027 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 924 transitions. [2021-03-10 21:32:25,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:25,027 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 924 transitions. [2021-03-10 21:32:25,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:25,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:25,028 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:25,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10116 [2021-03-10 21:32:25,242 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:25,242 INFO L82 PathProgramCache]: Analyzing trace with hash -869718087, now seen corresponding path program 123 times [2021-03-10 21:32:25,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:25,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767597578] [2021-03-10 21:32:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:25,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767597578] [2021-03-10 21:32:25,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461826757] [2021-03-10 21:32:25,282 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 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 [2021-03-10 21:32:25,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:32:25,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:25,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:25,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:25,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:25,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:25,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334600342] [2021-03-10 21:32:25,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:25,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:25,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:25,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:25,332 INFO L87 Difference]: Start difference. First operand 312 states and 924 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:25,451 INFO L93 Difference]: Finished difference Result 490 states and 1202 transitions. [2021-03-10 21:32:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:25,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:32:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:25,452 INFO L225 Difference]: With dead ends: 490 [2021-03-10 21:32:25,452 INFO L226 Difference]: Without dead ends: 490 [2021-03-10 21:32:25,452 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-03-10 21:32:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 300. [2021-03-10 21:32:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9665551839464883) internal successors, (887), 299 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 887 transitions. [2021-03-10 21:32:25,455 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 887 transitions. Word has length 18 [2021-03-10 21:32:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:25,455 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 887 transitions. [2021-03-10 21:32:25,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 887 transitions. [2021-03-10 21:32:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:25,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:25,456 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:25,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10117,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:25,656 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash 613416851, now seen corresponding path program 124 times [2021-03-10 21:32:25,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:25,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512214086] [2021-03-10 21:32:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:25,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512214086] [2021-03-10 21:32:25,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826149005] [2021-03-10 21:32:25,693 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 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 [2021-03-10 21:32:25,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:25,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:25,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:25,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:25,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:25,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321029901] [2021-03-10 21:32:25,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:25,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:25,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:25,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:25,745 INFO L87 Difference]: Start difference. First operand 300 states and 887 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:25,888 INFO L93 Difference]: Finished difference Result 433 states and 1094 transitions. [2021-03-10 21:32:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:25,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:32:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:25,889 INFO L225 Difference]: With dead ends: 433 [2021-03-10 21:32:25,889 INFO L226 Difference]: Without dead ends: 433 [2021-03-10 21:32:25,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:25,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-03-10 21:32:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 294. [2021-03-10 21:32:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:25,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-03-10 21:32:25,892 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 18 [2021-03-10 21:32:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:25,892 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-03-10 21:32:25,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-03-10 21:32:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:25,893 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:25,893 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:26,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10118 [2021-03-10 21:32:26,107 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:26,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:26,107 INFO L82 PathProgramCache]: Analyzing trace with hash -654040327, now seen corresponding path program 125 times [2021-03-10 21:32:26,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:26,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414680154] [2021-03-10 21:32:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:26,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414680154] [2021-03-10 21:32:26,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683434901] [2021-03-10 21:32:26,159 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 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 [2021-03-10 21:32:26,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:32:26,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:26,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:26,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:26,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:26,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190210086] [2021-03-10 21:32:26,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:26,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:26,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:26,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:26,209 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:26,376 INFO L93 Difference]: Finished difference Result 474 states and 1217 transitions. [2021-03-10 21:32:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:32:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:26,377 INFO L225 Difference]: With dead ends: 474 [2021-03-10 21:32:26,377 INFO L226 Difference]: Without dead ends: 474 [2021-03-10 21:32:26,378 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:32:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-03-10 21:32:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 298. [2021-03-10 21:32:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9663299663299663) internal successors, (881), 297 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 881 transitions. [2021-03-10 21:32:26,381 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 881 transitions. Word has length 18 [2021-03-10 21:32:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:26,381 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 881 transitions. [2021-03-10 21:32:26,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:32:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 881 transitions. [2021-03-10 21:32:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:26,381 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:26,381 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:26,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10119,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:26,582 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:26,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1289253300, now seen corresponding path program 126 times [2021-03-10 21:32:26,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:26,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377928509] [2021-03-10 21:32:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377928509] [2021-03-10 21:32:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71596177] [2021-03-10 21:32:26,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:32:26,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:26,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:26,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:26,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:26,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:26,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:27,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:27,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:27,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:27,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:27,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:27,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:27,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131337667] [2021-03-10 21:32:27,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:27,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:27,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:27,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:27,393 INFO L87 Difference]: Start difference. First operand 298 states and 881 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:27,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:27,801 INFO L93 Difference]: Finished difference Result 381 states and 1116 transitions. [2021-03-10 21:32:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:27,802 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:27,802 INFO L225 Difference]: With dead ends: 381 [2021-03-10 21:32:27,802 INFO L226 Difference]: Without dead ends: 376 [2021-03-10 21:32:27,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-03-10 21:32:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 341. [2021-03-10 21:32:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-03-10 21:32:27,806 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-03-10 21:32:27,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:27,806 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-03-10 21:32:27,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-03-10 21:32:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:27,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:27,806 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:28,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10120,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:28,007 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:28,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1280234538, now seen corresponding path program 127 times [2021-03-10 21:32:28,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:28,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471291865] [2021-03-10 21:32:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:28,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471291865] [2021-03-10 21:32:28,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985300364] [2021-03-10 21:32:28,100 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 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 [2021-03-10 21:32:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:28,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:28,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:28,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:28,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:28,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:28,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:28,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:28,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:28,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:28,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:28,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228188975] [2021-03-10 21:32:28,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:28,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:28,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:28,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:28,789 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:29,229 INFO L93 Difference]: Finished difference Result 396 states and 1134 transitions. [2021-03-10 21:32:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:32:29,229 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:29,230 INFO L225 Difference]: With dead ends: 396 [2021-03-10 21:32:29,230 INFO L226 Difference]: Without dead ends: 391 [2021-03-10 21:32:29,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:32:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-03-10 21:32:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 341. [2021-03-10 21:32:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-03-10 21:32:29,233 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-03-10 21:32:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:29,233 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-03-10 21:32:29,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-03-10 21:32:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:29,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:29,234 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:29,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10306,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:29,434 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:29,435 INFO L82 PathProgramCache]: Analyzing trace with hash -355789591, now seen corresponding path program 128 times [2021-03-10 21:32:29,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:29,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526435821] [2021-03-10 21:32:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:29,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526435821] [2021-03-10 21:32:29,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477390931] [2021-03-10 21:32:29,475 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 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 [2021-03-10 21:32:29,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:29,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:29,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:29,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:29,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:29,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:29,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423464465] [2021-03-10 21:32:29,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:29,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:29,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:29,521 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:29,579 INFO L93 Difference]: Finished difference Result 539 states and 1358 transitions. [2021-03-10 21:32:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:29,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:32:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:29,580 INFO L225 Difference]: With dead ends: 539 [2021-03-10 21:32:29,580 INFO L226 Difference]: Without dead ends: 539 [2021-03-10 21:32:29,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:32:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-03-10 21:32:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 352. [2021-03-10 21:32:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0484330484330484) internal successors, (1070), 351 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1070 transitions. [2021-03-10 21:32:29,584 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1070 transitions. Word has length 18 [2021-03-10 21:32:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:29,584 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1070 transitions. [2021-03-10 21:32:29,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1070 transitions. [2021-03-10 21:32:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:29,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:29,584 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:29,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10550 [2021-03-10 21:32:29,799 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:29,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1878317903, now seen corresponding path program 129 times [2021-03-10 21:32:29,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:29,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607701572] [2021-03-10 21:32:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:29,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607701572] [2021-03-10 21:32:29,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121895267] [2021-03-10 21:32:29,841 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 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 [2021-03-10 21:32:29,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:29,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:29,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:29,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:29,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:29,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272980812] [2021-03-10 21:32:29,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:29,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:29,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:29,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:29,887 INFO L87 Difference]: Start difference. First operand 352 states and 1070 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:29,948 INFO L93 Difference]: Finished difference Result 516 states and 1352 transitions. [2021-03-10 21:32:29,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:32:29,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:32:29,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:29,949 INFO L225 Difference]: With dead ends: 516 [2021-03-10 21:32:29,949 INFO L226 Difference]: Without dead ends: 516 [2021-03-10 21:32:29,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-03-10 21:32:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 368. [2021-03-10 21:32:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-03-10 21:32:29,953 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-03-10 21:32:29,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:29,953 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-03-10 21:32:29,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,953 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-03-10 21:32:29,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:29,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:29,954 INFO L519 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:30,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10551 [2021-03-10 21:32:30,171 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:30,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1696554154, now seen corresponding path program 130 times [2021-03-10 21:32:30,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:30,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77829832] [2021-03-10 21:32:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:30,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77829832] [2021-03-10 21:32:30,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209843852] [2021-03-10 21:32:30,241 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 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 [2021-03-10 21:32:30,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:30,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:30,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:32:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:30,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:30,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-03-10 21:32:30,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:30,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:30,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:30,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-03-10 21:32:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:30,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:30,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:32:30,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938717018] [2021-03-10 21:32:30,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:32:30,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:30,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:32:30,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:30,679 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:30,919 INFO L93 Difference]: Finished difference Result 420 states and 1201 transitions. [2021-03-10 21:32:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:30,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:32:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:30,920 INFO L225 Difference]: With dead ends: 420 [2021-03-10 21:32:30,920 INFO L226 Difference]: Without dead ends: 415 [2021-03-10 21:32:30,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:32:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-03-10 21:32:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 368. [2021-03-10 21:32:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-03-10 21:32:30,924 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-03-10 21:32:30,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:30,924 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-03-10 21:32:30,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-03-10 21:32:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:30,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:30,925 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:31,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10552 [2021-03-10 21:32:31,125 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:31,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1878793815, now seen corresponding path program 131 times [2021-03-10 21:32:31,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:31,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465301518] [2021-03-10 21:32:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465301518] [2021-03-10 21:32:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524930780] [2021-03-10 21:32:31,166 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 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 [2021-03-10 21:32:31,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:31,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:31,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:31,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:31,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:31,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677429402] [2021-03-10 21:32:31,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:31,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:31,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:31,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:31,211 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:31,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:31,268 INFO L93 Difference]: Finished difference Result 489 states and 1363 transitions. [2021-03-10 21:32:31,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:32:31,268 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:32:31,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:31,269 INFO L225 Difference]: With dead ends: 489 [2021-03-10 21:32:31,269 INFO L226 Difference]: Without dead ends: 489 [2021-03-10 21:32:31,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:32:31,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-10 21:32:31,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 401. [2021-03-10 21:32:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0625) internal successors, (1225), 400 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1225 transitions. [2021-03-10 21:32:31,273 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1225 transitions. Word has length 18 [2021-03-10 21:32:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:31,273 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 1225 transitions. [2021-03-10 21:32:31,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1225 transitions. [2021-03-10 21:32:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:31,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:31,274 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:31,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10662 [2021-03-10 21:32:31,475 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:31,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:31,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1909827215, now seen corresponding path program 132 times [2021-03-10 21:32:31,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:31,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032493056] [2021-03-10 21:32:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:31,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032493056] [2021-03-10 21:32:31,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118427689] [2021-03-10 21:32:31,523 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 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 [2021-03-10 21:32:31,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:31,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:31,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:31,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:31,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:31,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:31,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776673969] [2021-03-10 21:32:31,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:31,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:31,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:31,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:31,577 INFO L87 Difference]: Start difference. First operand 401 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:31,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:31,668 INFO L93 Difference]: Finished difference Result 521 states and 1410 transitions. [2021-03-10 21:32:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:31,669 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:32:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:31,669 INFO L225 Difference]: With dead ends: 521 [2021-03-10 21:32:31,669 INFO L226 Difference]: Without dead ends: 521 [2021-03-10 21:32:31,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-10 21:32:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-03-10 21:32:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0606060606060606) internal successors, (1212), 396 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1212 transitions. [2021-03-10 21:32:31,673 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1212 transitions. Word has length 18 [2021-03-10 21:32:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:31,673 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 1212 transitions. [2021-03-10 21:32:31,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1212 transitions. [2021-03-10 21:32:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:31,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:31,674 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:31,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10663 [2021-03-10 21:32:31,874 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:31,875 INFO L82 PathProgramCache]: Analyzing trace with hash -902005143, now seen corresponding path program 133 times [2021-03-10 21:32:31,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:31,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562346834] [2021-03-10 21:32:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:31,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562346834] [2021-03-10 21:32:31,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359799680] [2021-03-10 21:32:31,914 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 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 [2021-03-10 21:32:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:31,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:31,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:31,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:31,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:31,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882448031] [2021-03-10 21:32:31,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:31,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:31,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:31,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:31,964 INFO L87 Difference]: Start difference. First operand 397 states and 1212 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:32,088 INFO L93 Difference]: Finished difference Result 501 states and 1377 transitions. [2021-03-10 21:32:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:32,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:32:32,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:32,089 INFO L225 Difference]: With dead ends: 501 [2021-03-10 21:32:32,089 INFO L226 Difference]: Without dead ends: 501 [2021-03-10 21:32:32,089 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:32,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-03-10 21:32:32,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 394. [2021-03-10 21:32:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-03-10 21:32:32,093 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-03-10 21:32:32,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:32,093 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-03-10 21:32:32,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-03-10 21:32:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:32,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:32,094 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:32,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10664 [2021-03-10 21:32:32,294 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:32,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:32,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2125504975, now seen corresponding path program 134 times [2021-03-10 21:32:32,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:32,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995589732] [2021-03-10 21:32:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:32,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995589732] [2021-03-10 21:32:32,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3110539] [2021-03-10 21:32:32,336 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 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 [2021-03-10 21:32:32,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:32,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:32,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:32,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:32,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:32,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231422645] [2021-03-10 21:32:32,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:32,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:32,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:32,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:32,396 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:32,523 INFO L93 Difference]: Finished difference Result 512 states and 1422 transitions. [2021-03-10 21:32:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:32:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:32,524 INFO L225 Difference]: With dead ends: 512 [2021-03-10 21:32:32,524 INFO L226 Difference]: Without dead ends: 512 [2021-03-10 21:32:32,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-03-10 21:32:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 394. [2021-03-10 21:32:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-03-10 21:32:32,528 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-03-10 21:32:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:32,528 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-03-10 21:32:32,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-03-10 21:32:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:32:32,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:32,529 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:32,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10665,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:32,729 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:32,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1489038121, now seen corresponding path program 135 times [2021-03-10 21:32:32,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:32,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424536390] [2021-03-10 21:32:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:32,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424536390] [2021-03-10 21:32:32,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125882757] [2021-03-10 21:32:32,773 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 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 [2021-03-10 21:32:32,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:32,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:32,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:32:32,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:32,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:32,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:32,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180673547] [2021-03-10 21:32:32,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:32,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:32,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:32,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:32,823 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:32,947 INFO L93 Difference]: Finished difference Result 594 states and 1635 transitions. [2021-03-10 21:32:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:32:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:32,948 INFO L225 Difference]: With dead ends: 594 [2021-03-10 21:32:32,948 INFO L226 Difference]: Without dead ends: 594 [2021-03-10 21:32:32,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:32:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-03-10 21:32:32,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-03-10 21:32:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0597014925373136) internal successors, (1230), 402 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1230 transitions. [2021-03-10 21:32:32,953 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1230 transitions. Word has length 18 [2021-03-10 21:32:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:32,954 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1230 transitions. [2021-03-10 21:32:32,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1230 transitions. [2021-03-10 21:32:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:32,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:32,954 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:33,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10666 [2021-03-10 21:32:33,167 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:33,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash 610808602, now seen corresponding path program 136 times [2021-03-10 21:32:33,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:33,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439991452] [2021-03-10 21:32:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:33,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439991452] [2021-03-10 21:32:33,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644957750] [2021-03-10 21:32:33,217 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 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 [2021-03-10 21:32:33,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:33,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:33,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:33,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:33,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:33,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631143540] [2021-03-10 21:32:33,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:33,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:33,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:33,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:33,267 INFO L87 Difference]: Start difference. First operand 403 states and 1230 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:33,366 INFO L93 Difference]: Finished difference Result 532 states and 1448 transitions. [2021-03-10 21:32:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:33,367 INFO L225 Difference]: With dead ends: 532 [2021-03-10 21:32:33,367 INFO L226 Difference]: Without dead ends: 532 [2021-03-10 21:32:33,367 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:33,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-03-10 21:32:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 415. [2021-03-10 21:32:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.07487922705314) internal successors, (1273), 414 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1273 transitions. [2021-03-10 21:32:33,371 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1273 transitions. Word has length 19 [2021-03-10 21:32:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:33,371 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1273 transitions. [2021-03-10 21:32:33,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1273 transitions. [2021-03-10 21:32:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:33,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:33,372 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:33,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10667 [2021-03-10 21:32:33,572 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:33,572 INFO L82 PathProgramCache]: Analyzing trace with hash 522898661, now seen corresponding path program 137 times [2021-03-10 21:32:33,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:33,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840612683] [2021-03-10 21:32:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:33,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840612683] [2021-03-10 21:32:33,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556000569] [2021-03-10 21:32:33,618 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 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 [2021-03-10 21:32:33,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:33,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:33,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:33,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:33,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574570327] [2021-03-10 21:32:33,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:33,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:33,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:33,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:33,665 INFO L87 Difference]: Start difference. First operand 415 states and 1273 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:33,845 INFO L93 Difference]: Finished difference Result 606 states and 1593 transitions. [2021-03-10 21:32:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:33,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:33,846 INFO L225 Difference]: With dead ends: 606 [2021-03-10 21:32:33,846 INFO L226 Difference]: Without dead ends: 597 [2021-03-10 21:32:33,846 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-03-10 21:32:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 419. [2021-03-10 21:32:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0717703349282295) internal successors, (1284), 418 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1284 transitions. [2021-03-10 21:32:33,850 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1284 transitions. Word has length 19 [2021-03-10 21:32:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:33,850 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 1284 transitions. [2021-03-10 21:32:33,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1284 transitions. [2021-03-10 21:32:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:33,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:33,851 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:34,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10668,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:34,051 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:34,052 INFO L82 PathProgramCache]: Analyzing trace with hash -544341384, now seen corresponding path program 138 times [2021-03-10 21:32:34,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:34,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141016473] [2021-03-10 21:32:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:34,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141016473] [2021-03-10 21:32:34,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147883868] [2021-03-10 21:32:34,094 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 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 [2021-03-10 21:32:34,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:34,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:34,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:34,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:34,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:34,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:34,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183582111] [2021-03-10 21:32:34,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:34,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:34,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:34,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:34,141 INFO L87 Difference]: Start difference. First operand 419 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:34,258 INFO L93 Difference]: Finished difference Result 466 states and 1355 transitions. [2021-03-10 21:32:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:34,259 INFO L225 Difference]: With dead ends: 466 [2021-03-10 21:32:34,259 INFO L226 Difference]: Without dead ends: 462 [2021-03-10 21:32:34,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-03-10 21:32:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 421. [2021-03-10 21:32:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.057142857142857) internal successors, (1284), 420 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1284 transitions. [2021-03-10 21:32:34,263 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1284 transitions. Word has length 19 [2021-03-10 21:32:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:34,263 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 1284 transitions. [2021-03-10 21:32:34,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1284 transitions. [2021-03-10 21:32:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:34,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:34,264 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:34,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10669 [2021-03-10 21:32:34,464 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:34,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2114601783, now seen corresponding path program 139 times [2021-03-10 21:32:34,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:34,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318648660] [2021-03-10 21:32:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318648660] [2021-03-10 21:32:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198100891] [2021-03-10 21:32:34,505 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 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 [2021-03-10 21:32:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:34,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:34,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:34,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:34,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159533042] [2021-03-10 21:32:34,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:34,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:34,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:34,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:34,556 INFO L87 Difference]: Start difference. First operand 421 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:34,612 INFO L93 Difference]: Finished difference Result 597 states and 1562 transitions. [2021-03-10 21:32:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:34,612 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:34,613 INFO L225 Difference]: With dead ends: 597 [2021-03-10 21:32:34,613 INFO L226 Difference]: Without dead ends: 597 [2021-03-10 21:32:34,613 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-03-10 21:32:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 407. [2021-03-10 21:32:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0320197044334973) internal successors, (1231), 406 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1231 transitions. [2021-03-10 21:32:34,617 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1231 transitions. Word has length 19 [2021-03-10 21:32:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:34,617 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 1231 transitions. [2021-03-10 21:32:34,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1231 transitions. [2021-03-10 21:32:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:34,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:34,618 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:34,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10670,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:34,827 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:34,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:34,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1564318246, now seen corresponding path program 140 times [2021-03-10 21:32:34,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:34,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815125236] [2021-03-10 21:32:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:34,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815125236] [2021-03-10 21:32:34,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793412412] [2021-03-10 21:32:34,872 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 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 [2021-03-10 21:32:34,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:34,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:34,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:34,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:34,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267491625] [2021-03-10 21:32:34,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:34,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:34,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:34,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:34,919 INFO L87 Difference]: Start difference. First operand 407 states and 1231 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:35,030 INFO L93 Difference]: Finished difference Result 489 states and 1403 transitions. [2021-03-10 21:32:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:35,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:35,031 INFO L225 Difference]: With dead ends: 489 [2021-03-10 21:32:35,031 INFO L226 Difference]: Without dead ends: 485 [2021-03-10 21:32:35,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-03-10 21:32:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 418. [2021-03-10 21:32:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0239808153477217) internal successors, (1261), 417 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1261 transitions. [2021-03-10 21:32:35,035 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1261 transitions. Word has length 19 [2021-03-10 21:32:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:35,035 INFO L480 AbstractCegarLoop]: Abstraction has 418 states and 1261 transitions. [2021-03-10 21:32:35,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1261 transitions. [2021-03-10 21:32:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:35,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:35,036 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:35,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10671,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:35,236 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash 672996615, now seen corresponding path program 141 times [2021-03-10 21:32:35,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:35,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970011478] [2021-03-10 21:32:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:35,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970011478] [2021-03-10 21:32:35,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526505810] [2021-03-10 21:32:35,277 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 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 [2021-03-10 21:32:35,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:35,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:35,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:35,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:35,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:35,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005373931] [2021-03-10 21:32:35,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:35,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:35,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:35,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:35,330 INFO L87 Difference]: Start difference. First operand 418 states and 1261 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:35,408 INFO L93 Difference]: Finished difference Result 636 states and 1639 transitions. [2021-03-10 21:32:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:35,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:35,409 INFO L225 Difference]: With dead ends: 636 [2021-03-10 21:32:35,409 INFO L226 Difference]: Without dead ends: 636 [2021-03-10 21:32:35,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-03-10 21:32:35,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 405. [2021-03-10 21:32:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.0024752475247523) internal successors, (1213), 404 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1213 transitions. [2021-03-10 21:32:35,413 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1213 transitions. Word has length 19 [2021-03-10 21:32:35,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:35,413 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1213 transitions. [2021-03-10 21:32:35,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1213 transitions. [2021-03-10 21:32:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:35,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:35,414 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:35,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10672 [2021-03-10 21:32:35,614 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1786709960, now seen corresponding path program 142 times [2021-03-10 21:32:35,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:35,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533969604] [2021-03-10 21:32:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:35,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533969604] [2021-03-10 21:32:35,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199267432] [2021-03-10 21:32:35,654 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 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 [2021-03-10 21:32:35,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:35,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:35,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:35,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:35,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711660331] [2021-03-10 21:32:35,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:35,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:35,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:35,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:35,700 INFO L87 Difference]: Start difference. First operand 405 states and 1213 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:35,793 INFO L93 Difference]: Finished difference Result 488 states and 1377 transitions. [2021-03-10 21:32:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:35,794 INFO L225 Difference]: With dead ends: 488 [2021-03-10 21:32:35,794 INFO L226 Difference]: Without dead ends: 482 [2021-03-10 21:32:35,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-03-10 21:32:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 409. [2021-03-10 21:32:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.9901960784313726) internal successors, (1220), 408 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1220 transitions. [2021-03-10 21:32:35,798 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1220 transitions. Word has length 19 [2021-03-10 21:32:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:35,798 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 1220 transitions. [2021-03-10 21:32:35,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1220 transitions. [2021-03-10 21:32:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:35,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:35,799 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:36,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10673 [2021-03-10 21:32:36,003 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:36,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1067090633, now seen corresponding path program 143 times [2021-03-10 21:32:36,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:36,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133703371] [2021-03-10 21:32:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:36,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133703371] [2021-03-10 21:32:36,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305398927] [2021-03-10 21:32:36,044 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 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 [2021-03-10 21:32:36,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:36,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:36,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:36,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:36,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:32:36,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489709338] [2021-03-10 21:32:36,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:36,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:36,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:36,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:36,096 INFO L87 Difference]: Start difference. First operand 409 states and 1220 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:36,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:36,188 INFO L93 Difference]: Finished difference Result 668 states and 1705 transitions. [2021-03-10 21:32:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:36,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:36,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:36,189 INFO L225 Difference]: With dead ends: 668 [2021-03-10 21:32:36,189 INFO L226 Difference]: Without dead ends: 668 [2021-03-10 21:32:36,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-03-10 21:32:36,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 429. [2021-03-10 21:32:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.0163551401869158) internal successors, (1291), 428 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1291 transitions. [2021-03-10 21:32:36,193 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1291 transitions. Word has length 19 [2021-03-10 21:32:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:36,194 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 1291 transitions. [2021-03-10 21:32:36,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1291 transitions. [2021-03-10 21:32:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:36,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:36,194 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:36,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10674 [2021-03-10 21:32:36,394 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1705598054, now seen corresponding path program 144 times [2021-03-10 21:32:36,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:36,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020995280] [2021-03-10 21:32:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:36,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020995280] [2021-03-10 21:32:36,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876760450] [2021-03-10 21:32:36,447 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 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 [2021-03-10 21:32:36,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:36,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:36,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:36,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:36,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:36,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:36,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100203513] [2021-03-10 21:32:36,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:36,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:36,498 INFO L87 Difference]: Start difference. First operand 429 states and 1291 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:36,588 INFO L93 Difference]: Finished difference Result 521 states and 1480 transitions. [2021-03-10 21:32:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:36,588 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:36,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:36,589 INFO L225 Difference]: With dead ends: 521 [2021-03-10 21:32:36,589 INFO L226 Difference]: Without dead ends: 513 [2021-03-10 21:32:36,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-03-10 21:32:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 427. [2021-03-10 21:32:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-03-10 21:32:36,594 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-03-10 21:32:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:36,594 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-03-10 21:32:36,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-03-10 21:32:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:36,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:36,594 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:36,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10675 [2021-03-10 21:32:36,795 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:36,795 INFO L82 PathProgramCache]: Analyzing trace with hash 824779527, now seen corresponding path program 145 times [2021-03-10 21:32:36,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:36,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497018386] [2021-03-10 21:32:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:36,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497018386] [2021-03-10 21:32:36,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456936703] [2021-03-10 21:32:36,837 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 [2021-03-10 21:32:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:36,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:36,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:36,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:36,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:36,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109357559] [2021-03-10 21:32:36,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:36,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:36,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:36,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:36,883 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:37,012 INFO L93 Difference]: Finished difference Result 690 states and 1758 transitions. [2021-03-10 21:32:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:37,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:37,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:37,013 INFO L225 Difference]: With dead ends: 690 [2021-03-10 21:32:37,013 INFO L226 Difference]: Without dead ends: 690 [2021-03-10 21:32:37,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-03-10 21:32:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 427. [2021-03-10 21:32:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-03-10 21:32:37,018 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-03-10 21:32:37,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:37,018 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-03-10 21:32:37,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-03-10 21:32:37,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:37,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:37,019 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:37,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10676 [2021-03-10 21:32:37,221 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:37,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1044035814, now seen corresponding path program 146 times [2021-03-10 21:32:37,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:37,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339056444] [2021-03-10 21:32:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:37,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339056444] [2021-03-10 21:32:37,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106611795] [2021-03-10 21:32:37,250 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 [2021-03-10 21:32:37,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:37,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:37,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:37,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:32:37,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:37,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:32:37,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200269326] [2021-03-10 21:32:37,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:32:37,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:37,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:32:37,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:32:37,298 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:37,350 INFO L93 Difference]: Finished difference Result 587 states and 1642 transitions. [2021-03-10 21:32:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:32:37,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:37,352 INFO L225 Difference]: With dead ends: 587 [2021-03-10 21:32:37,352 INFO L226 Difference]: Without dead ends: 587 [2021-03-10 21:32:37,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-03-10 21:32:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 451. [2021-03-10 21:32:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.0644444444444443) internal successors, (1379), 450 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1379 transitions. [2021-03-10 21:32:37,357 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1379 transitions. Word has length 19 [2021-03-10 21:32:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:37,357 INFO L480 AbstractCegarLoop]: Abstraction has 451 states and 1379 transitions. [2021-03-10 21:32:37,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1379 transitions. [2021-03-10 21:32:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:37,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:37,357 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:37,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10677,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:37,563 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:37,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:37,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1821185413, now seen corresponding path program 147 times [2021-03-10 21:32:37,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:37,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023445729] [2021-03-10 21:32:37,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:37,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023445729] [2021-03-10 21:32:37,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973100443] [2021-03-10 21:32:37,588 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:32:37,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:37,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:37,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:32:37,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:37,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:32:37,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612049996] [2021-03-10 21:32:37,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:32:37,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:32:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:32:37,645 INFO L87 Difference]: Start difference. First operand 451 states and 1379 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:37,731 INFO L93 Difference]: Finished difference Result 581 states and 1594 transitions. [2021-03-10 21:32:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:32:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:37,732 INFO L225 Difference]: With dead ends: 581 [2021-03-10 21:32:37,732 INFO L226 Difference]: Without dead ends: 579 [2021-03-10 21:32:37,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:32:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-03-10 21:32:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 466. [2021-03-10 21:32:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0709677419354837) internal successors, (1428), 465 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1428 transitions. [2021-03-10 21:32:37,737 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1428 transitions. Word has length 19 [2021-03-10 21:32:37,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:37,737 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 1428 transitions. [2021-03-10 21:32:37,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:37,737 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1428 transitions. [2021-03-10 21:32:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:37,738 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:37,738 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:37,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10678 [2021-03-10 21:32:37,947 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:37,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2123535389, now seen corresponding path program 148 times [2021-03-10 21:32:37,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:37,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619361426] [2021-03-10 21:32:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:37,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619361426] [2021-03-10 21:32:37,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87890677] [2021-03-10 21:32:37,978 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 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 [2021-03-10 21:32:37,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:37,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:37,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:37,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:38,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:38,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:38,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624344822] [2021-03-10 21:32:38,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:38,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:38,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:38,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:38,024 INFO L87 Difference]: Start difference. First operand 466 states and 1428 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:38,078 INFO L93 Difference]: Finished difference Result 595 states and 1618 transitions. [2021-03-10 21:32:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:32:38,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:38,079 INFO L225 Difference]: With dead ends: 595 [2021-03-10 21:32:38,079 INFO L226 Difference]: Without dead ends: 595 [2021-03-10 21:32:38,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-03-10 21:32:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 465. [2021-03-10 21:32:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-03-10 21:32:38,084 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-03-10 21:32:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:38,084 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-03-10 21:32:38,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-03-10 21:32:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:38,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:38,085 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:38,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10679,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:38,285 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1633576329, now seen corresponding path program 149 times [2021-03-10 21:32:38,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:38,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085256122] [2021-03-10 21:32:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:38,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085256122] [2021-03-10 21:32:38,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114986246] [2021-03-10 21:32:38,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:32:38,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:32:38,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:38,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:38,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:38,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:38,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926282214] [2021-03-10 21:32:38,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:38,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:38,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:38,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:38,371 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:38,450 INFO L93 Difference]: Finished difference Result 631 states and 1678 transitions. [2021-03-10 21:32:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:38,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:38,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:38,451 INFO L225 Difference]: With dead ends: 631 [2021-03-10 21:32:38,451 INFO L226 Difference]: Without dead ends: 631 [2021-03-10 21:32:38,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-03-10 21:32:38,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 465. [2021-03-10 21:32:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-03-10 21:32:38,456 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-03-10 21:32:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:38,456 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-03-10 21:32:38,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-03-10 21:32:38,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:38,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:38,456 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:38,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10680,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:38,657 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1259104068, now seen corresponding path program 150 times [2021-03-10 21:32:38,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:38,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794437709] [2021-03-10 21:32:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:38,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794437709] [2021-03-10 21:32:38,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767455892] [2021-03-10 21:32:38,700 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 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 [2021-03-10 21:32:38,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:32:38,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:38,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:38,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:38,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:38,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:38,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304455344] [2021-03-10 21:32:38,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:38,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:38,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:38,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:38,745 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:38,865 INFO L93 Difference]: Finished difference Result 578 states and 1659 transitions. [2021-03-10 21:32:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:38,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:38,866 INFO L225 Difference]: With dead ends: 578 [2021-03-10 21:32:38,866 INFO L226 Difference]: Without dead ends: 570 [2021-03-10 21:32:38,867 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-03-10 21:32:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 469. [2021-03-10 21:32:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-03-10 21:32:38,872 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-03-10 21:32:38,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:38,872 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-03-10 21:32:38,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-03-10 21:32:38,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:38,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:38,872 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:39,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10681 [2021-03-10 21:32:39,073 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:39,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2139922595, now seen corresponding path program 151 times [2021-03-10 21:32:39,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:39,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693258647] [2021-03-10 21:32:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:39,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693258647] [2021-03-10 21:32:39,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359591870] [2021-03-10 21:32:39,114 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 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 [2021-03-10 21:32:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:39,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:39,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:39,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:39,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:39,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751387607] [2021-03-10 21:32:39,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:39,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:39,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:39,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:39,161 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:39,287 INFO L93 Difference]: Finished difference Result 678 states and 1771 transitions. [2021-03-10 21:32:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:39,288 INFO L225 Difference]: With dead ends: 678 [2021-03-10 21:32:39,288 INFO L226 Difference]: Without dead ends: 678 [2021-03-10 21:32:39,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-03-10 21:32:39,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 469. [2021-03-10 21:32:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-03-10 21:32:39,293 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-03-10 21:32:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:39,293 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-03-10 21:32:39,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-03-10 21:32:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:39,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:39,294 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:39,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10682 [2021-03-10 21:32:39,494 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:39,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1702003208, now seen corresponding path program 152 times [2021-03-10 21:32:39,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:39,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927171618] [2021-03-10 21:32:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:39,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927171618] [2021-03-10 21:32:39,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991192159] [2021-03-10 21:32:39,540 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 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 [2021-03-10 21:32:39,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:39,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:39,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:39,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:39,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560566790] [2021-03-10 21:32:39,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:39,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:39,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:39,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:39,599 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:39,702 INFO L93 Difference]: Finished difference Result 606 states and 1712 transitions. [2021-03-10 21:32:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:39,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:39,703 INFO L225 Difference]: With dead ends: 606 [2021-03-10 21:32:39,703 INFO L226 Difference]: Without dead ends: 596 [2021-03-10 21:32:39,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-03-10 21:32:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 477. [2021-03-10 21:32:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.03781512605042) internal successors, (1446), 476 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1446 transitions. [2021-03-10 21:32:39,708 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1446 transitions. Word has length 19 [2021-03-10 21:32:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:39,708 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 1446 transitions. [2021-03-10 21:32:39,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1446 transitions. [2021-03-10 21:32:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:39,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:39,709 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:39,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10683,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:39,909 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:39,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:39,910 INFO L82 PathProgramCache]: Analyzing trace with hash -656787657, now seen corresponding path program 153 times [2021-03-10 21:32:39,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:39,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841886514] [2021-03-10 21:32:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:39,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841886514] [2021-03-10 21:32:39,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082017404] [2021-03-10 21:32:39,954 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 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 [2021-03-10 21:32:39,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:39,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:39,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:39,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:40,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:40,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:40,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960688753] [2021-03-10 21:32:40,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:40,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:40,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:40,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:40,008 INFO L87 Difference]: Start difference. First operand 477 states and 1446 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:40,192 INFO L93 Difference]: Finished difference Result 741 states and 1915 transitions. [2021-03-10 21:32:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:32:40,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:40,193 INFO L225 Difference]: With dead ends: 741 [2021-03-10 21:32:40,193 INFO L226 Difference]: Without dead ends: 741 [2021-03-10 21:32:40,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:40,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-03-10 21:32:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 466. [2021-03-10 21:32:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0279569892473117) internal successors, (1408), 465 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1408 transitions. [2021-03-10 21:32:40,198 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1408 transitions. Word has length 19 [2021-03-10 21:32:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:40,198 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 1408 transitions. [2021-03-10 21:32:40,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1408 transitions. [2021-03-10 21:32:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:40,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:40,199 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:40,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10684 [2021-03-10 21:32:40,400 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:40,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1539478916, now seen corresponding path program 154 times [2021-03-10 21:32:40,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:40,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664276406] [2021-03-10 21:32:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:40,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664276406] [2021-03-10 21:32:40,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820955872] [2021-03-10 21:32:40,434 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 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 [2021-03-10 21:32:40,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:40,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:40,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:40,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:40,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:40,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:40,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185815303] [2021-03-10 21:32:40,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:40,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:40,481 INFO L87 Difference]: Start difference. First operand 466 states and 1408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:40,536 INFO L93 Difference]: Finished difference Result 658 states and 1841 transitions. [2021-03-10 21:32:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:32:40,536 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:40,537 INFO L225 Difference]: With dead ends: 658 [2021-03-10 21:32:40,537 INFO L226 Difference]: Without dead ends: 658 [2021-03-10 21:32:40,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-03-10 21:32:40,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 506. [2021-03-10 21:32:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.091089108910891) internal successors, (1561), 505 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1561 transitions. [2021-03-10 21:32:40,543 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1561 transitions. Word has length 19 [2021-03-10 21:32:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:40,543 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1561 transitions. [2021-03-10 21:32:40,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1561 transitions. [2021-03-10 21:32:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:40,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:40,544 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:40,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10685 [2021-03-10 21:32:40,744 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:40,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:40,744 INFO L82 PathProgramCache]: Analyzing trace with hash 762329317, now seen corresponding path program 155 times [2021-03-10 21:32:40,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:40,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036936176] [2021-03-10 21:32:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:40,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036936176] [2021-03-10 21:32:40,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254239109] [2021-03-10 21:32:40,775 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 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 [2021-03-10 21:32:40,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:40,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:40,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:40,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:40,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:40,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:40,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984971150] [2021-03-10 21:32:40,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:40,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:40,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:40,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:40,820 INFO L87 Difference]: Start difference. First operand 506 states and 1561 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:40,920 INFO L93 Difference]: Finished difference Result 668 states and 1844 transitions. [2021-03-10 21:32:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:40,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:40,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:40,921 INFO L225 Difference]: With dead ends: 668 [2021-03-10 21:32:40,921 INFO L226 Difference]: Without dead ends: 666 [2021-03-10 21:32:40,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-03-10 21:32:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 524. [2021-03-10 21:32:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.108986615678776) internal successors, (1626), 523 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1626 transitions. [2021-03-10 21:32:40,926 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1626 transitions. Word has length 19 [2021-03-10 21:32:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:40,926 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1626 transitions. [2021-03-10 21:32:40,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,927 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1626 transitions. [2021-03-10 21:32:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:40,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:40,927 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:41,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10686 [2021-03-10 21:32:41,128 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:41,128 INFO L82 PathProgramCache]: Analyzing trace with hash -186000542, now seen corresponding path program 156 times [2021-03-10 21:32:41,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:41,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290359613] [2021-03-10 21:32:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:41,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290359613] [2021-03-10 21:32:41,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466587511] [2021-03-10 21:32:41,160 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 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 [2021-03-10 21:32:41,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:41,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:41,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:41,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:41,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032918830] [2021-03-10 21:32:41,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:41,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:41,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:41,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:41,207 INFO L87 Difference]: Start difference. First operand 524 states and 1626 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:41,302 INFO L93 Difference]: Finished difference Result 664 states and 1886 transitions. [2021-03-10 21:32:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:41,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:41,304 INFO L225 Difference]: With dead ends: 664 [2021-03-10 21:32:41,304 INFO L226 Difference]: Without dead ends: 662 [2021-03-10 21:32:41,304 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-03-10 21:32:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 524. [2021-03-10 21:32:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.107074569789675) internal successors, (1625), 523 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1625 transitions. [2021-03-10 21:32:41,309 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1625 transitions. Word has length 19 [2021-03-10 21:32:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:41,309 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1625 transitions. [2021-03-10 21:32:41,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1625 transitions. [2021-03-10 21:32:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:41,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:41,310 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:41,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10687,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:41,510 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:41,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1822024671, now seen corresponding path program 157 times [2021-03-10 21:32:41,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:41,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981782244] [2021-03-10 21:32:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:41,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981782244] [2021-03-10 21:32:41,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441651387] [2021-03-10 21:32:41,541 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 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 [2021-03-10 21:32:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:41,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:41,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:41,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:41,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:32:41,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654371664] [2021-03-10 21:32:41,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:32:41,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:41,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:32:41,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:32:41,588 INFO L87 Difference]: Start difference. First operand 524 states and 1625 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:41,642 INFO L93 Difference]: Finished difference Result 657 states and 1827 transitions. [2021-03-10 21:32:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:32:41,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:41,643 INFO L225 Difference]: With dead ends: 657 [2021-03-10 21:32:41,643 INFO L226 Difference]: Without dead ends: 657 [2021-03-10 21:32:41,643 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-03-10 21:32:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 524. [2021-03-10 21:32:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1032504780114722) internal successors, (1623), 523 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1623 transitions. [2021-03-10 21:32:41,648 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1623 transitions. Word has length 19 [2021-03-10 21:32:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:41,648 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1623 transitions. [2021-03-10 21:32:41,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1623 transitions. [2021-03-10 21:32:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:41,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:41,649 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:41,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10688 [2021-03-10 21:32:41,850 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash 949938401, now seen corresponding path program 158 times [2021-03-10 21:32:41,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:41,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194935797] [2021-03-10 21:32:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:41,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194935797] [2021-03-10 21:32:41,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477017109] [2021-03-10 21:32:41,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:32:41,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:41,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:41,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:41,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:41,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:41,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:41,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069452041] [2021-03-10 21:32:41,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:41,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:41,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:41,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:41,935 INFO L87 Difference]: Start difference. First operand 524 states and 1623 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:42,009 INFO L93 Difference]: Finished difference Result 654 states and 1817 transitions. [2021-03-10 21:32:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:32:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:42,010 INFO L225 Difference]: With dead ends: 654 [2021-03-10 21:32:42,010 INFO L226 Difference]: Without dead ends: 654 [2021-03-10 21:32:42,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-03-10 21:32:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 521. [2021-03-10 21:32:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.098076923076923) internal successors, (1611), 520 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1611 transitions. [2021-03-10 21:32:42,015 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1611 transitions. Word has length 19 [2021-03-10 21:32:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:42,015 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 1611 transitions. [2021-03-10 21:32:42,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1611 transitions. [2021-03-10 21:32:42,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:42,016 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:42,016 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:42,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10689,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:42,216 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1324410662, now seen corresponding path program 159 times [2021-03-10 21:32:42,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:42,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346898094] [2021-03-10 21:32:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:42,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346898094] [2021-03-10 21:32:42,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123013086] [2021-03-10 21:32:42,258 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 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 [2021-03-10 21:32:42,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:42,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:42,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:42,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:42,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:42,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:42,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797165474] [2021-03-10 21:32:42,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:42,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:42,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:42,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:42,312 INFO L87 Difference]: Start difference. First operand 521 states and 1611 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:42,426 INFO L93 Difference]: Finished difference Result 678 states and 1970 transitions. [2021-03-10 21:32:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:42,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:42,427 INFO L225 Difference]: With dead ends: 678 [2021-03-10 21:32:42,427 INFO L226 Difference]: Without dead ends: 670 [2021-03-10 21:32:42,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-03-10 21:32:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 544. [2021-03-10 21:32:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.1270718232044197) internal successors, (1698), 543 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1698 transitions. [2021-03-10 21:32:42,433 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1698 transitions. Word has length 19 [2021-03-10 21:32:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:42,433 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 1698 transitions. [2021-03-10 21:32:42,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1698 transitions. [2021-03-10 21:32:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:42,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:42,434 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:42,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10690,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:42,634 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:42,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:42,635 INFO L82 PathProgramCache]: Analyzing trace with hash 443592135, now seen corresponding path program 160 times [2021-03-10 21:32:42,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:42,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827243358] [2021-03-10 21:32:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:42,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827243358] [2021-03-10 21:32:42,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828066432] [2021-03-10 21:32:42,675 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 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 [2021-03-10 21:32:42,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:42,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:42,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:42,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:42,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:42,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705661091] [2021-03-10 21:32:42,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:42,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:42,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:42,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:42,736 INFO L87 Difference]: Start difference. First operand 544 states and 1698 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:42,858 INFO L93 Difference]: Finished difference Result 717 states and 1973 transitions. [2021-03-10 21:32:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:42,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:42,859 INFO L225 Difference]: With dead ends: 717 [2021-03-10 21:32:42,859 INFO L226 Difference]: Without dead ends: 717 [2021-03-10 21:32:42,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-03-10 21:32:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 548. [2021-03-10 21:32:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.126142595978062) internal successors, (1710), 547 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1710 transitions. [2021-03-10 21:32:42,865 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1710 transitions. Word has length 19 [2021-03-10 21:32:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:42,865 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1710 transitions. [2021-03-10 21:32:42,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1710 transitions. [2021-03-10 21:32:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:42,866 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:42,866 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:43,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10691,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:43,067 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash 881511522, now seen corresponding path program 161 times [2021-03-10 21:32:43,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:43,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536487424] [2021-03-10 21:32:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:43,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536487424] [2021-03-10 21:32:43,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549250262] [2021-03-10 21:32:43,111 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 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 [2021-03-10 21:32:43,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:43,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:43,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:43,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:43,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:43,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220933944] [2021-03-10 21:32:43,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:43,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:43,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:43,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:43,179 INFO L87 Difference]: Start difference. First operand 548 states and 1710 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:43,295 INFO L93 Difference]: Finished difference Result 704 states and 2024 transitions. [2021-03-10 21:32:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:43,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:43,296 INFO L225 Difference]: With dead ends: 704 [2021-03-10 21:32:43,296 INFO L226 Difference]: Without dead ends: 694 [2021-03-10 21:32:43,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-03-10 21:32:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 548. [2021-03-10 21:32:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.1243144424131626) internal successors, (1709), 547 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1709 transitions. [2021-03-10 21:32:43,302 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1709 transitions. Word has length 19 [2021-03-10 21:32:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:43,302 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1709 transitions. [2021-03-10 21:32:43,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1709 transitions. [2021-03-10 21:32:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:43,303 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:43,303 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:43,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10692,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:43,503 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:43,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1926727073, now seen corresponding path program 162 times [2021-03-10 21:32:43,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:43,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557213239] [2021-03-10 21:32:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:43,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557213239] [2021-03-10 21:32:43,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534751816] [2021-03-10 21:32:43,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:32:43,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:32:43,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:43,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:43,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:43,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:43,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:43,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943096361] [2021-03-10 21:32:43,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:43,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:43,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:43,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:43,601 INFO L87 Difference]: Start difference. First operand 548 states and 1709 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:43,777 INFO L93 Difference]: Finished difference Result 763 states and 2067 transitions. [2021-03-10 21:32:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:43,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:43,778 INFO L225 Difference]: With dead ends: 763 [2021-03-10 21:32:43,778 INFO L226 Difference]: Without dead ends: 763 [2021-03-10 21:32:43,778 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:32:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-03-10 21:32:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 531. [2021-03-10 21:32:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1245283018867926) internal successors, (1656), 530 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1656 transitions. [2021-03-10 21:32:43,784 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1656 transitions. Word has length 19 [2021-03-10 21:32:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:43,784 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1656 transitions. [2021-03-10 21:32:43,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1656 transitions. [2021-03-10 21:32:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:43,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:43,784 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:43,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10693 [2021-03-10 21:32:43,985 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:43,985 INFO L82 PathProgramCache]: Analyzing trace with hash 36540070, now seen corresponding path program 163 times [2021-03-10 21:32:43,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:43,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648169017] [2021-03-10 21:32:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:44,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648169017] [2021-03-10 21:32:44,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137407152] [2021-03-10 21:32:44,031 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 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 [2021-03-10 21:32:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:44,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:44,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:44,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284246374] [2021-03-10 21:32:44,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:44,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:44,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:44,083 INFO L87 Difference]: Start difference. First operand 531 states and 1656 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:44,139 INFO L93 Difference]: Finished difference Result 610 states and 1818 transitions. [2021-03-10 21:32:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:44,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:44,140 INFO L225 Difference]: With dead ends: 610 [2021-03-10 21:32:44,140 INFO L226 Difference]: Without dead ends: 598 [2021-03-10 21:32:44,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-03-10 21:32:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 531. [2021-03-10 21:32:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1226415094339623) internal successors, (1655), 530 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1655 transitions. [2021-03-10 21:32:44,145 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1655 transitions. Word has length 19 [2021-03-10 21:32:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:44,145 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1655 transitions. [2021-03-10 21:32:44,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1655 transitions. [2021-03-10 21:32:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:44,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:44,146 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:44,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10694 [2021-03-10 21:32:44,346 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:44,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:44,346 INFO L82 PathProgramCache]: Analyzing trace with hash 659269895, now seen corresponding path program 164 times [2021-03-10 21:32:44,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:44,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906576357] [2021-03-10 21:32:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906576357] [2021-03-10 21:32:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444474120] [2021-03-10 21:32:44,392 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 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 [2021-03-10 21:32:44,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:44,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:44,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:44,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:44,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:44,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:44,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256708336] [2021-03-10 21:32:44,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:44,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:44,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:44,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:44,445 INFO L87 Difference]: Start difference. First operand 531 states and 1655 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:44,644 INFO L93 Difference]: Finished difference Result 855 states and 2351 transitions. [2021-03-10 21:32:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:44,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:44,645 INFO L225 Difference]: With dead ends: 855 [2021-03-10 21:32:44,645 INFO L226 Difference]: Without dead ends: 855 [2021-03-10 21:32:44,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-03-10 21:32:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 577. [2021-03-10 21:32:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1180555555555554) internal successors, (1796), 576 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1796 transitions. [2021-03-10 21:32:44,651 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1796 transitions. Word has length 19 [2021-03-10 21:32:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:44,651 INFO L480 AbstractCegarLoop]: Abstraction has 577 states and 1796 transitions. [2021-03-10 21:32:44,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1796 transitions. [2021-03-10 21:32:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:44,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:44,652 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:44,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10695 [2021-03-10 21:32:44,852 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash 24056922, now seen corresponding path program 165 times [2021-03-10 21:32:44,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:44,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572899284] [2021-03-10 21:32:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:44,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572899284] [2021-03-10 21:32:44,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263243757] [2021-03-10 21:32:44,889 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 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 [2021-03-10 21:32:44,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:44,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:44,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:44,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:44,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:44,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:44,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561385243] [2021-03-10 21:32:44,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:44,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:44,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:44,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:44,938 INFO L87 Difference]: Start difference. First operand 577 states and 1796 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:44,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:44,998 INFO L93 Difference]: Finished difference Result 817 states and 2337 transitions. [2021-03-10 21:32:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:32:44,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:44,999 INFO L225 Difference]: With dead ends: 817 [2021-03-10 21:32:44,999 INFO L226 Difference]: Without dead ends: 817 [2021-03-10 21:32:44,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-03-10 21:32:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 632. [2021-03-10 21:32:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.172741679873217) internal successors, (2002), 631 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2002 transitions. [2021-03-10 21:32:45,007 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2002 transitions. Word has length 19 [2021-03-10 21:32:45,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:45,007 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 2002 transitions. [2021-03-10 21:32:45,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2002 transitions. [2021-03-10 21:32:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:45,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:45,008 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:45,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10696 [2021-03-10 21:32:45,223 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash -753092677, now seen corresponding path program 166 times [2021-03-10 21:32:45,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:45,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936929476] [2021-03-10 21:32:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:45,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936929476] [2021-03-10 21:32:45,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665001012] [2021-03-10 21:32:45,258 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 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 [2021-03-10 21:32:45,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:45,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:45,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:45,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:45,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:45,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:45,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436949232] [2021-03-10 21:32:45,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:45,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:45,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:45,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:45,308 INFO L87 Difference]: Start difference. First operand 632 states and 2002 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:45,427 INFO L93 Difference]: Finished difference Result 820 states and 2329 transitions. [2021-03-10 21:32:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:45,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:45,428 INFO L225 Difference]: With dead ends: 820 [2021-03-10 21:32:45,429 INFO L226 Difference]: Without dead ends: 818 [2021-03-10 21:32:45,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-03-10 21:32:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 649. [2021-03-10 21:32:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.1882716049382718) internal successors, (2066), 648 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2066 transitions. [2021-03-10 21:32:45,435 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2066 transitions. Word has length 19 [2021-03-10 21:32:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:45,435 INFO L480 AbstractCegarLoop]: Abstraction has 649 states and 2066 transitions. [2021-03-10 21:32:45,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2066 transitions. [2021-03-10 21:32:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:45,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:45,436 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:45,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10697,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:45,637 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1701422536, now seen corresponding path program 167 times [2021-03-10 21:32:45,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:45,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876150608] [2021-03-10 21:32:45,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:45,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876150608] [2021-03-10 21:32:45,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134267966] [2021-03-10 21:32:45,672 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 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 [2021-03-10 21:32:45,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:32:45,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:45,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:45,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:45,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:45,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293412720] [2021-03-10 21:32:45,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:45,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:45,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:45,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:45,717 INFO L87 Difference]: Start difference. First operand 649 states and 2066 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:45,818 INFO L93 Difference]: Finished difference Result 822 states and 2381 transitions. [2021-03-10 21:32:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:45,818 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:45,819 INFO L225 Difference]: With dead ends: 822 [2021-03-10 21:32:45,819 INFO L226 Difference]: Without dead ends: 820 [2021-03-10 21:32:45,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-03-10 21:32:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 629. [2021-03-10 21:32:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.1640127388535033) internal successors, (1987), 628 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1987 transitions. [2021-03-10 21:32:45,827 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1987 transitions. Word has length 19 [2021-03-10 21:32:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:45,827 INFO L480 AbstractCegarLoop]: Abstraction has 629 states and 1987 transitions. [2021-03-10 21:32:45,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1987 transitions. [2021-03-10 21:32:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:45,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:45,827 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:46,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10698 [2021-03-10 21:32:46,028 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:46,028 INFO L82 PathProgramCache]: Analyzing trace with hash 957520631, now seen corresponding path program 168 times [2021-03-10 21:32:46,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:46,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506943327] [2021-03-10 21:32:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:46,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506943327] [2021-03-10 21:32:46,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577402980] [2021-03-10 21:32:46,064 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 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 [2021-03-10 21:32:46,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:46,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:46,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:46,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:46,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:46,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:46,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346939942] [2021-03-10 21:32:46,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:46,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:46,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:46,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:46,113 INFO L87 Difference]: Start difference. First operand 629 states and 1987 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:46,171 INFO L93 Difference]: Finished difference Result 797 states and 2254 transitions. [2021-03-10 21:32:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:46,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:46,172 INFO L225 Difference]: With dead ends: 797 [2021-03-10 21:32:46,173 INFO L226 Difference]: Without dead ends: 797 [2021-03-10 21:32:46,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:32:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-03-10 21:32:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 610. [2021-03-10 21:32:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.147783251231527) internal successors, (1917), 609 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1917 transitions. [2021-03-10 21:32:46,179 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1917 transitions. Word has length 19 [2021-03-10 21:32:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:46,179 INFO L480 AbstractCegarLoop]: Abstraction has 610 states and 1917 transitions. [2021-03-10 21:32:46,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1917 transitions. [2021-03-10 21:32:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:46,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:46,180 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:46,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10699,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:46,380 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:46,380 INFO L82 PathProgramCache]: Analyzing trace with hash -212017540, now seen corresponding path program 169 times [2021-03-10 21:32:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:46,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215718696] [2021-03-10 21:32:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:46,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215718696] [2021-03-10 21:32:46,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518073750] [2021-03-10 21:32:46,417 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 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 [2021-03-10 21:32:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:46,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:46,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:46,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:46,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:46,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823258846] [2021-03-10 21:32:46,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:46,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:46,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:46,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:46,463 INFO L87 Difference]: Start difference. First operand 610 states and 1917 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:46,566 INFO L93 Difference]: Finished difference Result 795 states and 2316 transitions. [2021-03-10 21:32:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:46,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:46,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:46,568 INFO L225 Difference]: With dead ends: 795 [2021-03-10 21:32:46,568 INFO L226 Difference]: Without dead ends: 791 [2021-03-10 21:32:46,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-03-10 21:32:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 610. [2021-03-10 21:32:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.1461412151067325) internal successors, (1916), 609 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1916 transitions. [2021-03-10 21:32:46,575 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1916 transitions. Word has length 19 [2021-03-10 21:32:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:46,575 INFO L480 AbstractCegarLoop]: Abstraction has 610 states and 1916 transitions. [2021-03-10 21:32:46,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1916 transitions. [2021-03-10 21:32:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:46,575 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:46,575 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:46,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10700 [2021-03-10 21:32:46,776 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:46,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1103339171, now seen corresponding path program 170 times [2021-03-10 21:32:46,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:46,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574545699] [2021-03-10 21:32:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:46,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574545699] [2021-03-10 21:32:46,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157344952] [2021-03-10 21:32:46,812 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 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 [2021-03-10 21:32:46,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:46,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:46,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:46,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:46,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:46,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:32:46,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654557589] [2021-03-10 21:32:46,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:32:46,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:46,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:32:46,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:32:46,859 INFO L87 Difference]: Start difference. First operand 610 states and 1916 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:46,935 INFO L93 Difference]: Finished difference Result 759 states and 2167 transitions. [2021-03-10 21:32:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:32:46,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:46,937 INFO L225 Difference]: With dead ends: 759 [2021-03-10 21:32:46,937 INFO L226 Difference]: Without dead ends: 759 [2021-03-10 21:32:46,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-03-10 21:32:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-03-10 21:32:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.134892086330935) internal successors, (1743), 556 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1743 transitions. [2021-03-10 21:32:46,943 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1743 transitions. Word has length 19 [2021-03-10 21:32:46,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:46,943 INFO L480 AbstractCegarLoop]: Abstraction has 557 states and 1743 transitions. [2021-03-10 21:32:46,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1743 transitions. [2021-03-10 21:32:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:46,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:46,943 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:47,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10701,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:47,144 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash -191011332, now seen corresponding path program 171 times [2021-03-10 21:32:47,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:47,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89723749] [2021-03-10 21:32:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89723749] [2021-03-10 21:32:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784566463] [2021-03-10 21:32:47,187 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 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 [2021-03-10 21:32:47,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:32:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:47,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:47,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:47,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:47,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014133515] [2021-03-10 21:32:47,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:47,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:47,232 INFO L87 Difference]: Start difference. First operand 557 states and 1743 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:47,340 INFO L93 Difference]: Finished difference Result 713 states and 2090 transitions. [2021-03-10 21:32:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:47,341 INFO L225 Difference]: With dead ends: 713 [2021-03-10 21:32:47,341 INFO L226 Difference]: Without dead ends: 705 [2021-03-10 21:32:47,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:47,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-03-10 21:32:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 580. [2021-03-10 21:32:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.153713298791019) internal successors, (1826), 579 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1826 transitions. [2021-03-10 21:32:47,348 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1826 transitions. Word has length 19 [2021-03-10 21:32:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:47,348 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 1826 transitions. [2021-03-10 21:32:47,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1826 transitions. [2021-03-10 21:32:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:47,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:47,349 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:47,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10702 [2021-03-10 21:32:47,549 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1071829859, now seen corresponding path program 172 times [2021-03-10 21:32:47,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:47,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748444488] [2021-03-10 21:32:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:47,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748444488] [2021-03-10 21:32:47,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824910176] [2021-03-10 21:32:47,590 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 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 [2021-03-10 21:32:47,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:47,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:47,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:47,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:47,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:47,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650697598] [2021-03-10 21:32:47,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:47,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:47,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:47,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:47,637 INFO L87 Difference]: Start difference. First operand 580 states and 1826 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:47,735 INFO L93 Difference]: Finished difference Result 748 states and 2153 transitions. [2021-03-10 21:32:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:47,736 INFO L225 Difference]: With dead ends: 748 [2021-03-10 21:32:47,736 INFO L226 Difference]: Without dead ends: 748 [2021-03-10 21:32:47,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-03-10 21:32:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 605. [2021-03-10 21:32:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1506622516556293) internal successors, (1903), 604 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1903 transitions. [2021-03-10 21:32:47,742 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1903 transitions. Word has length 19 [2021-03-10 21:32:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:47,742 INFO L480 AbstractCegarLoop]: Abstraction has 605 states and 1903 transitions. [2021-03-10 21:32:47,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1903 transitions. [2021-03-10 21:32:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:47,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:47,743 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:47,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10703,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:47,943 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:47,943 INFO L82 PathProgramCache]: Analyzing trace with hash -633910472, now seen corresponding path program 173 times [2021-03-10 21:32:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:47,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206861069] [2021-03-10 21:32:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:47,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206861069] [2021-03-10 21:32:47,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898364271] [2021-03-10 21:32:47,986 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 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 [2021-03-10 21:32:48,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:32:48,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:48,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:48,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:48,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:48,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729674402] [2021-03-10 21:32:48,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:48,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:48,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:48,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:48,037 INFO L87 Difference]: Start difference. First operand 605 states and 1903 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:48,160 INFO L93 Difference]: Finished difference Result 772 states and 2234 transitions. [2021-03-10 21:32:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:48,161 INFO L225 Difference]: With dead ends: 772 [2021-03-10 21:32:48,161 INFO L226 Difference]: Without dead ends: 762 [2021-03-10 21:32:48,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:32:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-03-10 21:32:48,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-03-10 21:32:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1490066225165565) internal successors, (1902), 604 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1902 transitions. [2021-03-10 21:32:48,168 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1902 transitions. Word has length 19 [2021-03-10 21:32:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:48,168 INFO L480 AbstractCegarLoop]: Abstraction has 605 states and 1902 transitions. [2021-03-10 21:32:48,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1902 transitions. [2021-03-10 21:32:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:48,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:48,169 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:48,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10704,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:48,370 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:48,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:48,370 INFO L82 PathProgramCache]: Analyzing trace with hash 411305079, now seen corresponding path program 174 times [2021-03-10 21:32:48,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:48,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441706567] [2021-03-10 21:32:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441706567] [2021-03-10 21:32:48,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646124955] [2021-03-10 21:32:48,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:32:48,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:32:48,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:48,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:48,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:48,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:48,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984025354] [2021-03-10 21:32:48,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:48,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:48,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:48,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:48,480 INFO L87 Difference]: Start difference. First operand 605 states and 1902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:48,631 INFO L93 Difference]: Finished difference Result 764 states and 2153 transitions. [2021-03-10 21:32:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:48,632 INFO L225 Difference]: With dead ends: 764 [2021-03-10 21:32:48,632 INFO L226 Difference]: Without dead ends: 764 [2021-03-10 21:32:48,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-03-10 21:32:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 593. [2021-03-10 21:32:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-03-10 21:32:48,638 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 19 [2021-03-10 21:32:48,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:48,638 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-03-10 21:32:48,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-03-10 21:32:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:48,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:48,639 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:48,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10705,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:48,840 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1478881924, now seen corresponding path program 175 times [2021-03-10 21:32:48,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:48,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401987820] [2021-03-10 21:32:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401987820] [2021-03-10 21:32:48,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472524357] [2021-03-10 21:32:48,888 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 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 [2021-03-10 21:32:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:48,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:48,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:48,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:48,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493015376] [2021-03-10 21:32:48,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:48,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:48,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:48,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:48,938 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:49,004 INFO L93 Difference]: Finished difference Result 677 states and 2039 transitions. [2021-03-10 21:32:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:49,005 INFO L225 Difference]: With dead ends: 677 [2021-03-10 21:32:49,005 INFO L226 Difference]: Without dead ends: 665 [2021-03-10 21:32:49,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-03-10 21:32:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 593. [2021-03-10 21:32:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1503378378378377) internal successors, (1865), 592 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1865 transitions. [2021-03-10 21:32:49,011 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1865 transitions. Word has length 19 [2021-03-10 21:32:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:49,011 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1865 transitions. [2021-03-10 21:32:49,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1865 transitions. [2021-03-10 21:32:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:49,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:49,012 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:49,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10706,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:49,226 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash -856152099, now seen corresponding path program 176 times [2021-03-10 21:32:49,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:49,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491352164] [2021-03-10 21:32:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:49,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491352164] [2021-03-10 21:32:49,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101836595] [2021-03-10 21:32:49,270 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 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 [2021-03-10 21:32:49,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:49,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:49,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:49,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:49,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:49,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:49,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790690862] [2021-03-10 21:32:49,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:49,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:49,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:49,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:49,325 INFO L87 Difference]: Start difference. First operand 593 states and 1865 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:49,499 INFO L93 Difference]: Finished difference Result 742 states and 2108 transitions. [2021-03-10 21:32:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:49,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:49,501 INFO L225 Difference]: With dead ends: 742 [2021-03-10 21:32:49,501 INFO L226 Difference]: Without dead ends: 742 [2021-03-10 21:32:49,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-03-10 21:32:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 587. [2021-03-10 21:32:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.151877133105802) internal successors, (1847), 586 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1847 transitions. [2021-03-10 21:32:49,507 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1847 transitions. Word has length 19 [2021-03-10 21:32:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:49,507 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 1847 transitions. [2021-03-10 21:32:49,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1847 transitions. [2021-03-10 21:32:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:49,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:49,508 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:49,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10707 [2021-03-10 21:32:49,708 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:49,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:49,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1903193160, now seen corresponding path program 177 times [2021-03-10 21:32:49,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:49,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198109703] [2021-03-10 21:32:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:49,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198109703] [2021-03-10 21:32:49,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996198133] [2021-03-10 21:32:49,757 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 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 [2021-03-10 21:32:49,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:49,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:49,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:49,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:49,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478696172] [2021-03-10 21:32:49,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:49,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:49,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:49,813 INFO L87 Difference]: Start difference. First operand 587 states and 1847 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:49,866 INFO L93 Difference]: Finished difference Result 671 states and 2020 transitions. [2021-03-10 21:32:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:49,868 INFO L225 Difference]: With dead ends: 671 [2021-03-10 21:32:49,868 INFO L226 Difference]: Without dead ends: 657 [2021-03-10 21:32:49,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:49,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-03-10 21:32:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 587. [2021-03-10 21:32:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.150170648464164) internal successors, (1846), 586 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1846 transitions. [2021-03-10 21:32:49,873 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1846 transitions. Word has length 19 [2021-03-10 21:32:49,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:49,873 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 1846 transitions. [2021-03-10 21:32:49,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1846 transitions. [2021-03-10 21:32:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:49,874 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:49,874 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:50,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10708,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:50,075 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1492618953, now seen corresponding path program 178 times [2021-03-10 21:32:50,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:50,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702124163] [2021-03-10 21:32:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:50,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702124163] [2021-03-10 21:32:50,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175588987] [2021-03-10 21:32:50,123 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 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 [2021-03-10 21:32:50,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:50,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:50,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:50,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:50,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:50,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:50,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288899706] [2021-03-10 21:32:50,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:50,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:50,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:50,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:50,176 INFO L87 Difference]: Start difference. First operand 587 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:50,355 INFO L93 Difference]: Finished difference Result 828 states and 2326 transitions. [2021-03-10 21:32:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:50,356 INFO L225 Difference]: With dead ends: 828 [2021-03-10 21:32:50,356 INFO L226 Difference]: Without dead ends: 828 [2021-03-10 21:32:50,356 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:32:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-03-10 21:32:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 591. [2021-03-10 21:32:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1491525423728812) internal successors, (1858), 590 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1858 transitions. [2021-03-10 21:32:50,362 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1858 transitions. Word has length 19 [2021-03-10 21:32:50,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:50,362 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1858 transitions. [2021-03-10 21:32:50,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,362 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1858 transitions. [2021-03-10 21:32:50,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:50,363 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:50,363 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:50,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10709,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:50,563 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash 290615364, now seen corresponding path program 179 times [2021-03-10 21:32:50,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:50,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549689996] [2021-03-10 21:32:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:50,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549689996] [2021-03-10 21:32:50,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548024028] [2021-03-10 21:32:50,609 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 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 [2021-03-10 21:32:50,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:32:50,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:50,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:50,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:50,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:50,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118748990] [2021-03-10 21:32:50,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:50,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:50,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:50,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:50,657 INFO L87 Difference]: Start difference. First operand 591 states and 1858 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:50,723 INFO L93 Difference]: Finished difference Result 869 states and 2474 transitions. [2021-03-10 21:32:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:50,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:50,724 INFO L225 Difference]: With dead ends: 869 [2021-03-10 21:32:50,724 INFO L226 Difference]: Without dead ends: 869 [2021-03-10 21:32:50,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-03-10 21:32:50,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 667. [2021-03-10 21:32:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.205705705705706) internal successors, (2135), 666 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2135 transitions. [2021-03-10 21:32:50,731 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2135 transitions. Word has length 19 [2021-03-10 21:32:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:50,731 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 2135 transitions. [2021-03-10 21:32:50,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2135 transitions. [2021-03-10 21:32:50,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:50,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:50,732 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:50,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10710 [2021-03-10 21:32:50,932 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash -486534235, now seen corresponding path program 180 times [2021-03-10 21:32:50,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:50,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156319966] [2021-03-10 21:32:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:50,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156319966] [2021-03-10 21:32:50,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001533474] [2021-03-10 21:32:50,982 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 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 [2021-03-10 21:32:50,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:50,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:50,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:51,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:51,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:51,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:51,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24198550] [2021-03-10 21:32:51,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:51,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:51,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:51,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:51,027 INFO L87 Difference]: Start difference. First operand 667 states and 2135 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:51,171 INFO L93 Difference]: Finished difference Result 878 states and 2501 transitions. [2021-03-10 21:32:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:51,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:51,173 INFO L225 Difference]: With dead ends: 878 [2021-03-10 21:32:51,173 INFO L226 Difference]: Without dead ends: 876 [2021-03-10 21:32:51,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-03-10 21:32:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 684. [2021-03-10 21:32:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.2225475841874083) internal successors, (2201), 683 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2201 transitions. [2021-03-10 21:32:51,180 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2201 transitions. Word has length 19 [2021-03-10 21:32:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:51,180 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 2201 transitions. [2021-03-10 21:32:51,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2201 transitions. [2021-03-10 21:32:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:51,181 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:51,181 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:51,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10711,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:51,381 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1434864094, now seen corresponding path program 181 times [2021-03-10 21:32:51,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:51,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865745840] [2021-03-10 21:32:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:51,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865745840] [2021-03-10 21:32:51,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166583678] [2021-03-10 21:32:51,424 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 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 [2021-03-10 21:32:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:51,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:51,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:51,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220600268] [2021-03-10 21:32:51,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:51,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:51,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:51,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:51,468 INFO L87 Difference]: Start difference. First operand 684 states and 2201 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:51,598 INFO L93 Difference]: Finished difference Result 876 states and 2523 transitions. [2021-03-10 21:32:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:51,599 INFO L225 Difference]: With dead ends: 876 [2021-03-10 21:32:51,599 INFO L226 Difference]: Without dead ends: 874 [2021-03-10 21:32:51,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-03-10 21:32:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 669. [2021-03-10 21:32:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2050898203592815) internal successors, (2141), 668 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2141 transitions. [2021-03-10 21:32:51,607 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2141 transitions. Word has length 19 [2021-03-10 21:32:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:51,607 INFO L480 AbstractCegarLoop]: Abstraction has 669 states and 2141 transitions. [2021-03-10 21:32:51,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2141 transitions. [2021-03-10 21:32:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:51,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:51,607 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:51,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10712 [2021-03-10 21:32:51,808 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:51,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1224079073, now seen corresponding path program 182 times [2021-03-10 21:32:51,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:51,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369926327] [2021-03-10 21:32:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:51,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369926327] [2021-03-10 21:32:51,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486436328] [2021-03-10 21:32:51,858 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 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 [2021-03-10 21:32:51,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:51,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:51,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:51,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:51,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:51,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:51,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600891894] [2021-03-10 21:32:51,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:51,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:51,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:51,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:51,907 INFO L87 Difference]: Start difference. First operand 669 states and 2141 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:51,990 INFO L93 Difference]: Finished difference Result 868 states and 2462 transitions. [2021-03-10 21:32:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:32:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:51,991 INFO L225 Difference]: With dead ends: 868 [2021-03-10 21:32:51,991 INFO L226 Difference]: Without dead ends: 868 [2021-03-10 21:32:51,991 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-03-10 21:32:51,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2021-03-10 21:32:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2005943536404162) internal successors, (2154), 673 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2154 transitions. [2021-03-10 21:32:51,998 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2154 transitions. Word has length 19 [2021-03-10 21:32:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:51,999 INFO L480 AbstractCegarLoop]: Abstraction has 674 states and 2154 transitions. [2021-03-10 21:32:51,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2154 transitions. [2021-03-10 21:32:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:51,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:51,999 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:52,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10713,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:52,200 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:52,200 INFO L82 PathProgramCache]: Analyzing trace with hash 54540902, now seen corresponding path program 183 times [2021-03-10 21:32:52,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:52,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588897735] [2021-03-10 21:32:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:52,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588897735] [2021-03-10 21:32:52,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242942343] [2021-03-10 21:32:52,241 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 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 [2021-03-10 21:32:52,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:52,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:52,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:52,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:52,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:52,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:52,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178317260] [2021-03-10 21:32:52,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:52,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:52,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:52,285 INFO L87 Difference]: Start difference. First operand 674 states and 2154 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:52,399 INFO L93 Difference]: Finished difference Result 905 states and 2624 transitions. [2021-03-10 21:32:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:52,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:52,400 INFO L225 Difference]: With dead ends: 905 [2021-03-10 21:32:52,400 INFO L226 Difference]: Without dead ends: 901 [2021-03-10 21:32:52,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-03-10 21:32:52,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 674. [2021-03-10 21:32:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.199108469539376) internal successors, (2153), 673 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2153 transitions. [2021-03-10 21:32:52,407 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2153 transitions. Word has length 19 [2021-03-10 21:32:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:52,407 INFO L480 AbstractCegarLoop]: Abstraction has 674 states and 2153 transitions. [2021-03-10 21:32:52,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2153 transitions. [2021-03-10 21:32:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:52,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:52,408 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:52,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10714 [2021-03-10 21:32:52,609 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash -836780729, now seen corresponding path program 184 times [2021-03-10 21:32:52,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:52,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327945206] [2021-03-10 21:32:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:52,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327945206] [2021-03-10 21:32:52,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166879593] [2021-03-10 21:32:52,659 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 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 [2021-03-10 21:32:52,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:52,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:52,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:52,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:52,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:52,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022535449] [2021-03-10 21:32:52,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:52,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:52,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:52,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:52,716 INFO L87 Difference]: Start difference. First operand 674 states and 2153 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:52,810 INFO L93 Difference]: Finished difference Result 858 states and 2461 transitions. [2021-03-10 21:32:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:32:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:52,812 INFO L225 Difference]: With dead ends: 858 [2021-03-10 21:32:52,812 INFO L226 Difference]: Without dead ends: 858 [2021-03-10 21:32:52,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-03-10 21:32:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 687. [2021-03-10 21:32:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.2011661807580176) internal successors, (2196), 686 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2196 transitions. [2021-03-10 21:32:52,819 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2196 transitions. Word has length 19 [2021-03-10 21:32:52,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:52,819 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 2196 transitions. [2021-03-10 21:32:52,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2196 transitions. [2021-03-10 21:32:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:52,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:52,820 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:53,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10715,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:53,034 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:53,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1018544478, now seen corresponding path program 185 times [2021-03-10 21:32:53,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:53,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137425464] [2021-03-10 21:32:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:53,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137425464] [2021-03-10 21:32:53,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354481204] [2021-03-10 21:32:53,075 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 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 [2021-03-10 21:32:53,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:32:53,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:53,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:53,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:53,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:53,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:53,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590386590] [2021-03-10 21:32:53,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:53,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:53,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:53,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:53,120 INFO L87 Difference]: Start difference. First operand 687 states and 2196 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:53,238 INFO L93 Difference]: Finished difference Result 936 states and 2753 transitions. [2021-03-10 21:32:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:53,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:53,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:53,240 INFO L225 Difference]: With dead ends: 936 [2021-03-10 21:32:53,240 INFO L226 Difference]: Without dead ends: 930 [2021-03-10 21:32:53,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-03-10 21:32:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 695. [2021-03-10 21:32:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.2031700288184437) internal successors, (2223), 694 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2223 transitions. [2021-03-10 21:32:53,248 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2223 transitions. Word has length 19 [2021-03-10 21:32:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:53,248 INFO L480 AbstractCegarLoop]: Abstraction has 695 states and 2223 transitions. [2021-03-10 21:32:53,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2223 transitions. [2021-03-10 21:32:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:53,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:53,249 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:53,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10716,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:53,463 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash -298925151, now seen corresponding path program 186 times [2021-03-10 21:32:53,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:53,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613652620] [2021-03-10 21:32:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:53,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613652620] [2021-03-10 21:32:53,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212858683] [2021-03-10 21:32:53,509 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 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 [2021-03-10 21:32:53,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:53,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:53,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:53,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:53,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:53,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929300990] [2021-03-10 21:32:53,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:53,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:53,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:53,559 INFO L87 Difference]: Start difference. First operand 695 states and 2223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:53,645 INFO L93 Difference]: Finished difference Result 835 states and 2456 transitions. [2021-03-10 21:32:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:53,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:53,647 INFO L225 Difference]: With dead ends: 835 [2021-03-10 21:32:53,647 INFO L226 Difference]: Without dead ends: 835 [2021-03-10 21:32:53,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-03-10 21:32:53,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 707. [2021-03-10 21:32:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.2011331444759206) internal successors, (2260), 706 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2260 transitions. [2021-03-10 21:32:53,654 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2260 transitions. Word has length 19 [2021-03-10 21:32:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:53,654 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 2260 transitions. [2021-03-10 21:32:53,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:53,654 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2260 transitions. [2021-03-10 21:32:53,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:53,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:53,655 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:53,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10717,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:53,869 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash 75547110, now seen corresponding path program 187 times [2021-03-10 21:32:53,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:53,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258526803] [2021-03-10 21:32:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:53,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258526803] [2021-03-10 21:32:53,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496220662] [2021-03-10 21:32:53,909 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 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 [2021-03-10 21:32:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:53,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:53,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:53,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:53,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:53,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132625343] [2021-03-10 21:32:53,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:53,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:53,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:53,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:53,952 INFO L87 Difference]: Start difference. First operand 707 states and 2260 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:54,057 INFO L93 Difference]: Finished difference Result 914 states and 2697 transitions. [2021-03-10 21:32:54,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:54,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:54,058 INFO L225 Difference]: With dead ends: 914 [2021-03-10 21:32:54,058 INFO L226 Difference]: Without dead ends: 906 [2021-03-10 21:32:54,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-03-10 21:32:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 707. [2021-03-10 21:32:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.198300283286119) internal successors, (2258), 706 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2258 transitions. [2021-03-10 21:32:54,066 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2258 transitions. Word has length 19 [2021-03-10 21:32:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:54,067 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 2258 transitions. [2021-03-10 21:32:54,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2258 transitions. [2021-03-10 21:32:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:54,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:54,067 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:54,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10718,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:54,268 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash -805271417, now seen corresponding path program 188 times [2021-03-10 21:32:54,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:54,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072467231] [2021-03-10 21:32:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:54,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072467231] [2021-03-10 21:32:54,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142735734] [2021-03-10 21:32:54,314 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 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 [2021-03-10 21:32:54,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:54,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:54,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:54,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:54,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:32:54,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670060465] [2021-03-10 21:32:54,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:32:54,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:54,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:32:54,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:32:54,370 INFO L87 Difference]: Start difference. First operand 707 states and 2258 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:54,441 INFO L93 Difference]: Finished difference Result 812 states and 2469 transitions. [2021-03-10 21:32:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:32:54,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:54,442 INFO L225 Difference]: With dead ends: 812 [2021-03-10 21:32:54,442 INFO L226 Difference]: Without dead ends: 812 [2021-03-10 21:32:54,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-03-10 21:32:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 737. [2021-03-10 21:32:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.1956521739130435) internal successors, (2352), 736 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2352 transitions. [2021-03-10 21:32:54,449 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2352 transitions. Word has length 19 [2021-03-10 21:32:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:54,449 INFO L480 AbstractCegarLoop]: Abstraction has 737 states and 2352 transitions. [2021-03-10 21:32:54,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2352 transitions. [2021-03-10 21:32:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:54,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:54,450 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:54,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10719,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:54,650 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash -367352030, now seen corresponding path program 189 times [2021-03-10 21:32:54,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:54,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667100324] [2021-03-10 21:32:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:54,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667100324] [2021-03-10 21:32:54,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900282944] [2021-03-10 21:32:54,692 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 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 [2021-03-10 21:32:54,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:32:54,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:54,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:54,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:54,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:54,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376986661] [2021-03-10 21:32:54,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:54,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:54,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:54,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:54,746 INFO L87 Difference]: Start difference. First operand 737 states and 2352 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:54,879 INFO L93 Difference]: Finished difference Result 930 states and 2762 transitions. [2021-03-10 21:32:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:54,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:54,881 INFO L225 Difference]: With dead ends: 930 [2021-03-10 21:32:54,881 INFO L226 Difference]: Without dead ends: 920 [2021-03-10 21:32:54,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-03-10 21:32:54,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 766. [2021-03-10 21:32:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.197385620915033) internal successors, (2446), 765 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2446 transitions. [2021-03-10 21:32:54,889 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2446 transitions. Word has length 19 [2021-03-10 21:32:54,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:54,889 INFO L480 AbstractCegarLoop]: Abstraction has 766 states and 2446 transitions. [2021-03-10 21:32:54,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2446 transitions. [2021-03-10 21:32:54,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:54,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:54,890 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:55,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10720,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:55,090 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:55,090 INFO L82 PathProgramCache]: Analyzing trace with hash 677863521, now seen corresponding path program 190 times [2021-03-10 21:32:55,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:55,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135358897] [2021-03-10 21:32:55,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:55,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135358897] [2021-03-10 21:32:55,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21352212] [2021-03-10 21:32:55,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:32:55,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:55,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:55,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:55,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:55,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540793638] [2021-03-10 21:32:55,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:55,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:55,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:55,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:55,195 INFO L87 Difference]: Start difference. First operand 766 states and 2446 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:55,325 INFO L93 Difference]: Finished difference Result 870 states and 2608 transitions. [2021-03-10 21:32:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:32:55,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:55,327 INFO L225 Difference]: With dead ends: 870 [2021-03-10 21:32:55,327 INFO L226 Difference]: Without dead ends: 870 [2021-03-10 21:32:55,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-03-10 21:32:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 762. [2021-03-10 21:32:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1984231274638635) internal successors, (2434), 761 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2434 transitions. [2021-03-10 21:32:55,335 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2434 transitions. Word has length 19 [2021-03-10 21:32:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:55,335 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2434 transitions. [2021-03-10 21:32:55,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2434 transitions. [2021-03-10 21:32:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:55,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:55,336 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:55,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10721 [2021-03-10 21:32:55,536 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:55,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1212323482, now seen corresponding path program 191 times [2021-03-10 21:32:55,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:55,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146096813] [2021-03-10 21:32:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:55,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146096813] [2021-03-10 21:32:55,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487055357] [2021-03-10 21:32:55,579 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 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 [2021-03-10 21:32:55,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:32:55,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:55,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:55,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:55,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:55,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211045816] [2021-03-10 21:32:55,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:55,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:55,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:55,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:55,631 INFO L87 Difference]: Start difference. First operand 762 states and 2434 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:55,704 INFO L93 Difference]: Finished difference Result 853 states and 2620 transitions. [2021-03-10 21:32:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:55,705 INFO L225 Difference]: With dead ends: 853 [2021-03-10 21:32:55,705 INFO L226 Difference]: Without dead ends: 841 [2021-03-10 21:32:55,705 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-03-10 21:32:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 762. [2021-03-10 21:32:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1971090670170828) internal successors, (2433), 761 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2433 transitions. [2021-03-10 21:32:55,713 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2433 transitions. Word has length 19 [2021-03-10 21:32:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:55,713 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2433 transitions. [2021-03-10 21:32:55,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2433 transitions. [2021-03-10 21:32:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:55,713 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:55,714 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:55,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10722,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:55,914 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:55,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:55,914 INFO L82 PathProgramCache]: Analyzing trace with hash -589593657, now seen corresponding path program 192 times [2021-03-10 21:32:55,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:55,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048425508] [2021-03-10 21:32:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:55,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048425508] [2021-03-10 21:32:55,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881134468] [2021-03-10 21:32:55,962 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 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 [2021-03-10 21:32:55,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:55,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:55,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:55,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:56,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:56,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:56,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970188345] [2021-03-10 21:32:56,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:56,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:56,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:56,016 INFO L87 Difference]: Start difference. First operand 762 states and 2433 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:56,154 INFO L93 Difference]: Finished difference Result 875 states and 2625 transitions. [2021-03-10 21:32:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:32:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:56,156 INFO L225 Difference]: With dead ends: 875 [2021-03-10 21:32:56,156 INFO L226 Difference]: Without dead ends: 875 [2021-03-10 21:32:56,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:56,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-03-10 21:32:56,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 759. [2021-03-10 21:32:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1978891820580473) internal successors, (2424), 758 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2424 transitions. [2021-03-10 21:32:56,164 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2424 transitions. Word has length 19 [2021-03-10 21:32:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:56,164 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2424 transitions. [2021-03-10 21:32:56,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2424 transitions. [2021-03-10 21:32:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:56,165 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:56,165 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:56,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10723,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:56,365 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:56,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1636634718, now seen corresponding path program 193 times [2021-03-10 21:32:56,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:56,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640113463] [2021-03-10 21:32:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:56,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640113463] [2021-03-10 21:32:56,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291378805] [2021-03-10 21:32:56,410 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 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 [2021-03-10 21:32:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:56,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:56,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:56,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:56,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:56,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875133068] [2021-03-10 21:32:56,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:56,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:56,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:56,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:56,460 INFO L87 Difference]: Start difference. First operand 759 states and 2424 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:56,518 INFO L93 Difference]: Finished difference Result 848 states and 2607 transitions. [2021-03-10 21:32:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:56,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:56,519 INFO L225 Difference]: With dead ends: 848 [2021-03-10 21:32:56,519 INFO L226 Difference]: Without dead ends: 834 [2021-03-10 21:32:56,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-03-10 21:32:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 759. [2021-03-10 21:32:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-03-10 21:32:56,527 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-03-10 21:32:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:56,527 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-03-10 21:32:56,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,527 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-03-10 21:32:56,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:56,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:56,527 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:56,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10724 [2021-03-10 21:32:56,728 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:56,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:56,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1226060511, now seen corresponding path program 194 times [2021-03-10 21:32:56,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:56,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849866697] [2021-03-10 21:32:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:56,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849866697] [2021-03-10 21:32:56,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115808678] [2021-03-10 21:32:56,780 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 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 [2021-03-10 21:32:56,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:56,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:56,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:56,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:56,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:56,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771995918] [2021-03-10 21:32:56,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:56,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:56,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:56,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:56,833 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:56,986 INFO L93 Difference]: Finished difference Result 921 states and 2738 transitions. [2021-03-10 21:32:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:56,987 INFO L225 Difference]: With dead ends: 921 [2021-03-10 21:32:56,987 INFO L226 Difference]: Without dead ends: 921 [2021-03-10 21:32:56,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:32:56,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-03-10 21:32:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 759. [2021-03-10 21:32:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-03-10 21:32:56,995 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-03-10 21:32:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:56,995 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-03-10 21:32:56,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-03-10 21:32:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:56,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:56,996 INFO L519 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:57,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10725,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:57,196 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1905381146, now seen corresponding path program 195 times [2021-03-10 21:32:57,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:57,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052918735] [2021-03-10 21:32:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:57,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052918735] [2021-03-10 21:32:57,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570818336] [2021-03-10 21:32:57,247 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 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 [2021-03-10 21:32:57,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:32:57,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:57,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:57,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:57,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:57,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850716640] [2021-03-10 21:32:57,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:57,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:57,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:57,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:57,299 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:57,350 INFO L93 Difference]: Finished difference Result 846 states and 2603 transitions. [2021-03-10 21:32:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:57,352 INFO L225 Difference]: With dead ends: 846 [2021-03-10 21:32:57,352 INFO L226 Difference]: Without dead ends: 830 [2021-03-10 21:32:57,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-10 21:32:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 757. [2021-03-10 21:32:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1997354497354498) internal successors, (2419), 756 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2419 transitions. [2021-03-10 21:32:57,360 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2419 transitions. Word has length 19 [2021-03-10 21:32:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:57,360 INFO L480 AbstractCegarLoop]: Abstraction has 757 states and 2419 transitions. [2021-03-10 21:32:57,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2419 transitions. [2021-03-10 21:32:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:32:57,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:57,360 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:57,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10726 [2021-03-10 21:32:57,561 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash 518303495, now seen corresponding path program 196 times [2021-03-10 21:32:57,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:57,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559296339] [2021-03-10 21:32:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:57,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559296339] [2021-03-10 21:32:57,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232231439] [2021-03-10 21:32:57,612 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 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 [2021-03-10 21:32:57,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:57,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:57,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:32:57,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:57,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:57,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:32:57,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027580767] [2021-03-10 21:32:57,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:32:57,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:57,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:32:57,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:32:57,663 INFO L87 Difference]: Start difference. First operand 757 states and 2419 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:57,812 INFO L93 Difference]: Finished difference Result 1025 states and 3016 transitions. [2021-03-10 21:32:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:57,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:32:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:57,814 INFO L225 Difference]: With dead ends: 1025 [2021-03-10 21:32:57,814 INFO L226 Difference]: Without dead ends: 1025 [2021-03-10 21:32:57,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-03-10 21:32:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 769. [2021-03-10 21:32:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.1927083333333335) internal successors, (2452), 768 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2452 transitions. [2021-03-10 21:32:57,822 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2452 transitions. Word has length 19 [2021-03-10 21:32:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:57,822 INFO L480 AbstractCegarLoop]: Abstraction has 769 states and 2452 transitions. [2021-03-10 21:32:57,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2452 transitions. [2021-03-10 21:32:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:57,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:57,823 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:58,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10727,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:58,038 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1714157417, now seen corresponding path program 197 times [2021-03-10 21:32:58,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:58,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377264366] [2021-03-10 21:32:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:58,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377264366] [2021-03-10 21:32:58,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430396355] [2021-03-10 21:32:58,157 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 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 [2021-03-10 21:32:58,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:32:58,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:58,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:32:58,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:58,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:58,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:32:59,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:59,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:59,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:59,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:32:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:59,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:59,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:32:59,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452073983] [2021-03-10 21:32:59,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:32:59,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:59,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:32:59,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:32:59,496 INFO L87 Difference]: Start difference. First operand 769 states and 2452 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:32:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:59,887 INFO L93 Difference]: Finished difference Result 853 states and 2629 transitions. [2021-03-10 21:32:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:32:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:32:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:59,888 INFO L225 Difference]: With dead ends: 853 [2021-03-10 21:32:59,888 INFO L226 Difference]: Without dead ends: 826 [2021-03-10 21:32:59,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:32:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-03-10 21:32:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 787. [2021-03-10 21:32:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.1895674300254453) internal successors, (2507), 786 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2507 transitions. [2021-03-10 21:32:59,897 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2507 transitions. Word has length 20 [2021-03-10 21:32:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:59,897 INFO L480 AbstractCegarLoop]: Abstraction has 787 states and 2507 transitions. [2021-03-10 21:32:59,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:32:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2507 transitions. [2021-03-10 21:32:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:32:59,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:59,898 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:00,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10728,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:00,113 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash -122454295, now seen corresponding path program 198 times [2021-03-10 21:33:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:00,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381478901] [2021-03-10 21:33:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:00,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381478901] [2021-03-10 21:33:00,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804438616] [2021-03-10 21:33:00,212 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 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 [2021-03-10 21:33:00,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:33:00,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:00,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:33:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:00,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:00,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:01,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:01,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:01,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:01,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:33:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:01,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:01,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:33:01,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498698863] [2021-03-10 21:33:01,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:33:01,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:01,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:33:01,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:01,651 INFO L87 Difference]: Start difference. First operand 787 states and 2507 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:02,064 INFO L93 Difference]: Finished difference Result 877 states and 2701 transitions. [2021-03-10 21:33:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:02,064 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:33:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:02,066 INFO L225 Difference]: With dead ends: 877 [2021-03-10 21:33:02,066 INFO L226 Difference]: Without dead ends: 861 [2021-03-10 21:33:02,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:33:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-03-10 21:33:02,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 806. [2021-03-10 21:33:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-03-10 21:33:02,075 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-03-10 21:33:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:02,075 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-03-10 21:33:02,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-03-10 21:33:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:33:02,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:02,076 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:02,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11107 [2021-03-10 21:33:02,276 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash 736420235, now seen corresponding path program 199 times [2021-03-10 21:33:02,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:02,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354402772] [2021-03-10 21:33:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:02,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354402772] [2021-03-10 21:33:02,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323461011] [2021-03-10 21:33:02,383 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 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 [2021-03-10 21:33:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:02,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:33:02,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:02,930 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 2028 DAG size of output: 48 [2021-03-10 21:33:03,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:03,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:03,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:04,436 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:33:04,437 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:33:04,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:33:05,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:06,255 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:33:06,255 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:33:06,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:33:07,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:08,191 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:33:08,192 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:33:08,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:33:09,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:09,127 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:33:09,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:09,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:33:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:09,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:09,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:33:09,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869542646] [2021-03-10 21:33:09,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:33:09,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:09,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:33:09,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:09,160 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:09,532 INFO L93 Difference]: Finished difference Result 901 states and 2754 transitions. [2021-03-10 21:33:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:33:09,533 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:33:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:09,534 INFO L225 Difference]: With dead ends: 901 [2021-03-10 21:33:09,534 INFO L226 Difference]: Without dead ends: 891 [2021-03-10 21:33:09,534 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:33:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-03-10 21:33:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 806. [2021-03-10 21:33:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-03-10 21:33:09,543 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-03-10 21:33:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:09,543 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-03-10 21:33:09,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-03-10 21:33:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:33:09,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:09,545 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:09,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11528,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:09,759 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:09,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1564059463, now seen corresponding path program 200 times [2021-03-10 21:33:09,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:09,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590021000] [2021-03-10 21:33:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:09,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590021000] [2021-03-10 21:33:09,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730875421] [2021-03-10 21:33:09,860 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 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 [2021-03-10 21:33:09,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:09,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:09,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:33:09,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:10,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:10,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:10,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:10,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:10,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:10,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:33:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:10,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:10,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:33:10,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124602754] [2021-03-10 21:33:10,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:33:10,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:10,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:33:10,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:10,789 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:11,217 INFO L93 Difference]: Finished difference Result 938 states and 2953 transitions. [2021-03-10 21:33:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:11,218 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:33:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:11,219 INFO L225 Difference]: With dead ends: 938 [2021-03-10 21:33:11,219 INFO L226 Difference]: Without dead ends: 922 [2021-03-10 21:33:11,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:33:11,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-03-10 21:33:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 871. [2021-03-10 21:33:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2367816091954023) internal successors, (2816), 870 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2816 transitions. [2021-03-10 21:33:11,228 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2816 transitions. Word has length 20 [2021-03-10 21:33:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:11,229 INFO L480 AbstractCegarLoop]: Abstraction has 871 states and 2816 transitions. [2021-03-10 21:33:11,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2816 transitions. [2021-03-10 21:33:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:33:11,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:11,230 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:11,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13174,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:11,430 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:11,430 INFO L82 PathProgramCache]: Analyzing trace with hash -705184933, now seen corresponding path program 201 times [2021-03-10 21:33:11,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:11,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493105927] [2021-03-10 21:33:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:11,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493105927] [2021-03-10 21:33:11,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769020185] [2021-03-10 21:33:11,537 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 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 [2021-03-10 21:33:11,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:33:11,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:11,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:33:11,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:11,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:11,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:13,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:13,780 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:33:13,780 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:33:13,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:33:16,756 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1130 DAG size of output: 587 [2021-03-10 21:33:16,914 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1195 DAG size of output: 638 [2021-03-10 21:33:17,074 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1195 DAG size of output: 638 [2021-03-10 21:33:17,256 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1201 DAG size of output: 610 [2021-03-10 21:33:17,361 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 596 [2021-03-10 21:33:20,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:21,174 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:33:21,174 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:33:21,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:33:23,609 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 903 [2021-03-10 21:33:23,715 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 903 [2021-03-10 21:33:23,851 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1561 DAG size of output: 902 [2021-03-10 21:33:23,994 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 1061 [2021-03-10 21:33:24,114 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 799 DAG size of output: 923 [2021-03-10 21:33:26,837 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1636 DAG size of output: 971 [2021-03-10 21:33:26,961 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1636 DAG size of output: 971 [2021-03-10 21:33:27,098 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1642 DAG size of output: 980 [2021-03-10 21:33:27,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:27,824 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:33:27,825 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:33:27,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:33:28,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:28,227 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:33:28,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:28,227 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:33:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:28,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:28,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:33:28,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252874465] [2021-03-10 21:33:28,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:33:28,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:28,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:33:28,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:28,258 INFO L87 Difference]: Start difference. First operand 871 states and 2816 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:28,775 INFO L93 Difference]: Finished difference Result 978 states and 3027 transitions. [2021-03-10 21:33:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:33:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:33:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:28,777 INFO L225 Difference]: With dead ends: 978 [2021-03-10 21:33:28,777 INFO L226 Difference]: Without dead ends: 959 [2021-03-10 21:33:28,777 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:33:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-03-10 21:33:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 869. [2021-03-10 21:33:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.224654377880184) internal successors, (2799), 868 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2799 transitions. [2021-03-10 21:33:28,786 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2799 transitions. Word has length 20 [2021-03-10 21:33:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:28,786 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2799 transitions. [2021-03-10 21:33:28,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2799 transitions. [2021-03-10 21:33:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:33:28,787 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:28,787 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:28,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13401,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:28,987 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1005428375, now seen corresponding path program 202 times [2021-03-10 21:33:28,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:28,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073747398] [2021-03-10 21:33:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:29,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073747398] [2021-03-10 21:33:29,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335214894] [2021-03-10 21:33:29,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:33:29,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:29,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:29,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:33:29,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:29,525 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:29,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:29,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:30,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:31,382 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:33:31,382 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:33:31,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:33:36,521 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1231 DAG size of output: 906 [2021-03-10 21:33:36,743 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 1973 DAG size of output: 1412 [2021-03-10 21:33:36,977 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 1973 DAG size of output: 1412 [2021-03-10 21:33:37,225 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 1979 DAG size of output: 1276 [2021-03-10 21:33:37,349 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1278 DAG size of output: 900 [2021-03-10 21:33:38,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:38,716 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:33:38,716 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:33:38,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:33:39,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:39,728 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:33:39,729 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:33:39,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:33:40,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:40,112 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:33:40,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:40,112 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:33:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:40,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:40,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:33:40,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323475369] [2021-03-10 21:33:40,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:33:40,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:40,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:33:40,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:40,141 INFO L87 Difference]: Start difference. First operand 869 states and 2799 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:40,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:40,682 INFO L93 Difference]: Finished difference Result 942 states and 2954 transitions. [2021-03-10 21:33:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:33:40,682 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:33:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:40,683 INFO L225 Difference]: With dead ends: 942 [2021-03-10 21:33:40,683 INFO L226 Difference]: Without dead ends: 932 [2021-03-10 21:33:40,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:33:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-03-10 21:33:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 872. [2021-03-10 21:33:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.2238805970149254) internal successors, (2808), 871 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2808 transitions. [2021-03-10 21:33:40,693 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2808 transitions. Word has length 20 [2021-03-10 21:33:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:40,693 INFO L480 AbstractCegarLoop]: Abstraction has 872 states and 2808 transitions. [2021-03-10 21:33:40,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2808 transitions. [2021-03-10 21:33:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:33:40,694 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:40,694 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:40,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16763 [2021-03-10 21:33:40,895 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:40,895 INFO L82 PathProgramCache]: Analyzing trace with hash 990820585, now seen corresponding path program 203 times [2021-03-10 21:33:40,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:40,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490763013] [2021-03-10 21:33:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:41,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490763013] [2021-03-10 21:33:41,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347171700] [2021-03-10 21:33:41,005 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 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 [2021-03-10 21:33:41,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:33:41,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:41,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:33:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:41,589 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 3527 DAG size of output: 48 [2021-03-10 21:33:41,700 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:41,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:41,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:44,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:44,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:44,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:44,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:33:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:44,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:44,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:33:44,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588523233] [2021-03-10 21:33:44,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:33:44,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:33:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:44,062 INFO L87 Difference]: Start difference. First operand 872 states and 2808 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:44,530 INFO L93 Difference]: Finished difference Result 1010 states and 3206 transitions. [2021-03-10 21:33:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:44,530 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:33:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:44,532 INFO L225 Difference]: With dead ends: 1010 [2021-03-10 21:33:44,532 INFO L226 Difference]: Without dead ends: 994 [2021-03-10 21:33:44,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:33:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-03-10 21:33:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 941. [2021-03-10 21:33:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.2542553191489363) internal successors, (3059), 940 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3059 transitions. [2021-03-10 21:33:44,542 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3059 transitions. Word has length 20 [2021-03-10 21:33:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:44,542 INFO L480 AbstractCegarLoop]: Abstraction has 941 states and 3059 transitions. [2021-03-10 21:33:44,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3059 transitions. [2021-03-10 21:33:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:33:44,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:44,543 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:44,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20200 [2021-03-10 21:33:44,743 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:44,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695115, now seen corresponding path program 204 times [2021-03-10 21:33:44,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:44,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110134921] [2021-03-10 21:33:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:44,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110134921] [2021-03-10 21:33:44,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414068803] [2021-03-10 21:33:44,853 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 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 [2021-03-10 21:33:44,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:33:44,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:44,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:33:44,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:45,261 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:45,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:45,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:45,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:46,279 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:33:46,280 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:33:46,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:33:49,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:49,646 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:33:49,646 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:33:49,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:33:50,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:50,616 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:33:50,617 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:33:50,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:33:51,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:33:51,108 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:33:51,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:33:51,109 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:33:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:51,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:51,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:33:51,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503857239] [2021-03-10 21:33:51,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:33:51,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:51,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:33:51,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:51,138 INFO L87 Difference]: Start difference. First operand 941 states and 3059 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:51,841 INFO L93 Difference]: Finished difference Result 1081 states and 3355 transitions. [2021-03-10 21:33:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:33:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:33:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:51,843 INFO L225 Difference]: With dead ends: 1081 [2021-03-10 21:33:51,843 INFO L226 Difference]: Without dead ends: 1055 [2021-03-10 21:33:51,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:33:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-03-10 21:33:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 947. [2021-03-10 21:33:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.251585623678647) internal successors, (3076), 946 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3076 transitions. [2021-03-10 21:33:51,853 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3076 transitions. Word has length 20 [2021-03-10 21:33:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:51,853 INFO L480 AbstractCegarLoop]: Abstraction has 947 states and 3076 transitions. [2021-03-10 21:33:51,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:33:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3076 transitions. [2021-03-10 21:33:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:33:51,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:51,854 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:52,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20855,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:52,055 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:52,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:52,055 INFO L82 PathProgramCache]: Analyzing trace with hash -734658873, now seen corresponding path program 205 times [2021-03-10 21:33:52,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:52,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964743676] [2021-03-10 21:33:52,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:52,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964743676] [2021-03-10 21:33:52,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417072996] [2021-03-10 21:33:52,154 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 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 [2021-03-10 21:33:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:52,170 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:33:52,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:52,634 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:33:52,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:52,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:33:53,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:53,829 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:33:53,830 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:33:53,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:33:58,506 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1224 DAG size of output: 1019 [2021-03-10 21:33:58,735 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1998 DAG size of output: 1651 [2021-03-10 21:34:00,924 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1084 DAG size of output: 848 [2021-03-10 21:34:03,013 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1139 DAG size of output: 887 [2021-03-10 21:34:03,227 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 1903 DAG size of output: 1478 [2021-03-10 21:34:03,691 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 3366 DAG size of output: 2713 [2021-03-10 21:34:04,177 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 3366 DAG size of output: 2713 [2021-03-10 21:34:04,729 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 3375 DAG size of output: 2398 [2021-03-10 21:34:05,350 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 2400 DAG size of output: 2870 [2021-03-10 21:34:05,681 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 1347 DAG size of output: 1704 [2021-03-10 21:34:05,828 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 976 DAG size of output: 846 [2021-03-10 21:34:05,940 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 733 DAG size of output: 711 [2021-03-10 21:34:08,245 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1987 DAG size of output: 873 [2021-03-10 21:34:08,660 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 3530 DAG size of output: 1944 [2021-03-10 21:34:09,056 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 3530 DAG size of output: 1944 [2021-03-10 21:34:09,460 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 3532 DAG size of output: 1914 [2021-03-10 21:34:09,736 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 1914 DAG size of output: 1745 [2021-03-10 21:34:09,847 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 808 [2021-03-10 21:34:11,417 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 1038 DAG size of output: 1365 [2021-03-10 21:34:12,793 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 1106 [2021-03-10 21:34:14,152 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 2079 DAG size of output: 1108 [2021-03-10 21:34:14,339 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 2079 DAG size of output: 1108 [2021-03-10 21:34:14,471 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 2082 DAG size of output: 746 [2021-03-10 21:34:14,584 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 915 [2021-03-10 21:34:15,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:15,533 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:34:15,533 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:34:15,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:34:18,099 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1315 DAG size of output: 918 [2021-03-10 21:34:20,827 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 1710 DAG size of output: 1379 [2021-03-10 21:34:21,099 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 2654 DAG size of output: 1937 [2021-03-10 21:34:21,388 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 2654 DAG size of output: 1937 [2021-03-10 21:34:21,696 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 2659 DAG size of output: 1746 [2021-03-10 21:34:21,915 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 1748 DAG size of output: 1669 [2021-03-10 21:34:22,122 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 1487 DAG size of output: 1549 [2021-03-10 21:34:22,330 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1670 [2021-03-10 21:34:22,470 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1375 DAG size of output: 1368 [2021-03-10 21:34:24,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:24,405 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:24,405 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:24,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:28,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:28,188 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:34:28,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:28,189 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:34:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:28,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:28,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:34:28,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801024380] [2021-03-10 21:34:28,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:34:28,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:28,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:34:28,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:34:28,218 INFO L87 Difference]: Start difference. First operand 947 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:34:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:28,676 INFO L93 Difference]: Finished difference Result 1018 states and 3228 transitions. [2021-03-10 21:34:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:34:28,676 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:34:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:28,677 INFO L225 Difference]: With dead ends: 1018 [2021-03-10 21:34:28,677 INFO L226 Difference]: Without dead ends: 1008 [2021-03-10 21:34:28,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 481.6ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:34:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-03-10 21:34:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 951. [2021-03-10 21:34:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-03-10 21:34:28,688 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-03-10 21:34:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:28,688 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-03-10 21:34:28,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:34:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-03-10 21:34:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:28,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:28,689 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:28,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22302 [2021-03-10 21:34:28,897 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:28,898 INFO L82 PathProgramCache]: Analyzing trace with hash 754746123, now seen corresponding path program 206 times [2021-03-10 21:34:28,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:28,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652750468] [2021-03-10 21:34:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652750468] [2021-03-10 21:34:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735014674] [2021-03-10 21:34:29,006 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 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 [2021-03-10 21:34:29,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:29,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:29,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:34:29,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:29,431 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:29,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:29,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:29,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:30,222 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:34:30,222 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:34:30,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:34:32,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:33,037 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:34:33,038 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:34:33,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:34:35,258 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 775 [2021-03-10 21:34:35,376 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1118 DAG size of output: 579 [2021-03-10 21:34:35,504 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 729 [2021-03-10 21:34:36,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:36,993 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:36,993 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:36,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:38,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:38,050 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:34:38,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:38,050 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:34:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:38,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:38,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:34:38,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853935814] [2021-03-10 21:34:38,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:34:38,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:38,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:34:38,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:34:38,083 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:34:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:38,646 INFO L93 Difference]: Finished difference Result 1044 states and 3286 transitions. [2021-03-10 21:34:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:34:38,647 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:34:38,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:38,648 INFO L225 Difference]: With dead ends: 1044 [2021-03-10 21:34:38,648 INFO L226 Difference]: Without dead ends: 1034 [2021-03-10 21:34:38,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:34:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-03-10 21:34:38,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 951. [2021-03-10 21:34:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-03-10 21:34:38,659 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-03-10 21:34:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:38,659 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-03-10 21:34:38,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:34:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-03-10 21:34:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:38,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:38,660 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:38,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30118,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:38,871 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:38,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:38,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1412276551, now seen corresponding path program 207 times [2021-03-10 21:34:38,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:38,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438413701] [2021-03-10 21:34:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:38,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438413701] [2021-03-10 21:34:38,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549941711] [2021-03-10 21:34:38,992 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 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 [2021-03-10 21:34:39,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:34:39,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:39,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:34:39,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:39,413 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:39,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:39,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:41,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:41,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:41,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:34:41,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:34:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:41,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:41,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:34:41,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4366713] [2021-03-10 21:34:41,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:34:41,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:41,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:34:41,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:34:41,837 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:34:42,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:42,424 INFO L93 Difference]: Finished difference Result 1074 states and 3428 transitions. [2021-03-10 21:34:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:34:42,424 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:34:42,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:42,426 INFO L225 Difference]: With dead ends: 1074 [2021-03-10 21:34:42,426 INFO L226 Difference]: Without dead ends: 1058 [2021-03-10 21:34:42,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:34:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-03-10 21:34:42,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1006. [2021-03-10 21:34:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.261691542288557) internal successors, (3278), 1005 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3278 transitions. [2021-03-10 21:34:42,437 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3278 transitions. Word has length 20 [2021-03-10 21:34:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:42,437 INFO L480 AbstractCegarLoop]: Abstraction has 1006 states and 3278 transitions. [2021-03-10 21:34:42,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:34:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3278 transitions. [2021-03-10 21:34:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:42,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:42,438 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:42,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31992,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:42,643 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash -553402021, now seen corresponding path program 208 times [2021-03-10 21:34:42,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:42,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204643994] [2021-03-10 21:34:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:42,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204643994] [2021-03-10 21:34:42,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539408756] [2021-03-10 21:34:42,759 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 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 [2021-03-10 21:34:42,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:42,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:42,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:34:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:43,168 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:43,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:43,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:44,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:44,771 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:34:44,772 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:34:44,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:34:46,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:46,580 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:34:46,580 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:34:46,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:34:48,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:48,617 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:48,618 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:48,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:34:49,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:49,213 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:34:49,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:34:49,214 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:34:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:49,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:49,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:34:49,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523649930] [2021-03-10 21:34:49,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:34:49,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:34:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:34:49,246 INFO L87 Difference]: Start difference. First operand 1006 states and 3278 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:34:50,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:50,131 INFO L93 Difference]: Finished difference Result 1179 states and 3670 transitions. [2021-03-10 21:34:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:34:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:34:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:50,133 INFO L225 Difference]: With dead ends: 1179 [2021-03-10 21:34:50,133 INFO L226 Difference]: Without dead ends: 1153 [2021-03-10 21:34:50,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 573.5ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:34:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-03-10 21:34:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1019. [2021-03-10 21:34:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.2652259332023577) internal successors, (3324), 1018 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3324 transitions. [2021-03-10 21:34:50,144 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3324 transitions. Word has length 20 [2021-03-10 21:34:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:50,144 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3324 transitions. [2021-03-10 21:34:50,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:34:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3324 transitions. [2021-03-10 21:34:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:34:50,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:50,146 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:50,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32730 [2021-03-10 21:34:50,346 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:50,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1157211287, now seen corresponding path program 209 times [2021-03-10 21:34:50,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:50,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205005994] [2021-03-10 21:34:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:50,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205005994] [2021-03-10 21:34:50,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090514402] [2021-03-10 21:34:50,450 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 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 [2021-03-10 21:34:50,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:34:50,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:50,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:34:50,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:50,892 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:34:50,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:34:50,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:34:52,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:34:52,562 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:34:52,562 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:34:52,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:34:55,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:56,277 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:34:56,277 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:34:56,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:34:58,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:34:59,153 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:34:59,153 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:34:59,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:00,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:00,764 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:35:00,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:00,765 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:35:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:00,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:00,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:35:00,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589565656] [2021-03-10 21:35:00,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:35:00,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:00,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:35:00,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:35:00,799 INFO L87 Difference]: Start difference. First operand 1019 states and 3324 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:35:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:01,507 INFO L93 Difference]: Finished difference Result 1092 states and 3484 transitions. [2021-03-10 21:35:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:35:01,508 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:35:01,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:01,509 INFO L225 Difference]: With dead ends: 1092 [2021-03-10 21:35:01,509 INFO L226 Difference]: Without dead ends: 1082 [2021-03-10 21:35:01,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:35:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-03-10 21:35:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1022. [2021-03-10 21:35:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-03-10 21:35:01,521 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-03-10 21:35:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:01,521 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-03-10 21:35:01,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:35:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-03-10 21:35:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:01,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:01,522 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:01,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34212,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:01,738 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:01,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1648351013, now seen corresponding path program 210 times [2021-03-10 21:35:01,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:01,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243512276] [2021-03-10 21:35:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:01,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243512276] [2021-03-10 21:35:01,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094039414] [2021-03-10 21:35:01,872 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 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 [2021-03-10 21:35:01,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:01,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:01,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:35:01,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:02,435 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:02,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:02,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:02,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:03,392 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:35:03,392 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:35:03,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:35:06,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:07,215 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:35:07,216 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:35:07,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:35:08,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:08,600 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:35:08,600 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:35:08,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:35:09,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:35:09,367 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:35:09,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:35:09,368 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:35:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:09,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:09,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:35:09,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522632456] [2021-03-10 21:35:09,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:35:09,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:09,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:35:09,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:35:09,401 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:35:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:10,031 INFO L93 Difference]: Finished difference Result 1112 states and 3526 transitions. [2021-03-10 21:35:10,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:35:10,031 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:35:10,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:10,033 INFO L225 Difference]: With dead ends: 1112 [2021-03-10 21:35:10,033 INFO L226 Difference]: Without dead ends: 1102 [2021-03-10 21:35:10,033 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 705.1ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:35:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-03-10 21:35:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1022. [2021-03-10 21:35:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-03-10 21:35:10,044 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-03-10 21:35:10,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:10,044 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-03-10 21:35:10,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:35:10,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-03-10 21:35:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:35:10,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:10,045 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:10,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36745 [2021-03-10 21:35:10,252 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:10,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1573530903, now seen corresponding path program 211 times [2021-03-10 21:35:10,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:10,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195100561] [2021-03-10 21:35:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:10,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195100561] [2021-03-10 21:35:10,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054410580] [2021-03-10 21:35:10,368 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 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 [2021-03-10 21:35:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:10,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:35:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:10,836 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:35:10,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:35:10,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:35:13,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:35:13,728 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:35:13,729 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:35:13,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:35:15,017 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 805 DAG size of output: 883 [2021-03-10 21:35:16,578 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 1010 [2021-03-10 21:35:17,810 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 1498 DAG size of output: 1320 [2021-03-10 21:35:19,541 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 1883 DAG size of output: 1458 [2021-03-10 21:35:21,496 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1537 DAG size of output: 1315 [2021-03-10 21:35:23,065 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 2016 DAG size of output: 1756 [2021-03-10 21:35:24,763 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1275 DAG size of output: 1035 [2021-03-10 21:35:26,104 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1240 DAG size of output: 1025 [2021-03-10 21:35:26,330 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 1954 DAG size of output: 1569 [2021-03-10 21:35:28,653 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1283 DAG size of output: 995 [2021-03-10 21:35:28,983 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 2707 DAG size of output: 1972 [2021-03-10 21:35:29,447 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 4119 DAG size of output: 2394 [2021-03-10 21:35:30,206 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 4924 DAG size of output: 3189 [2021-03-10 21:35:32,844 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1500 DAG size of output: 1011 [2021-03-10 21:35:34,649 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1399 DAG size of output: 1084 [2021-03-10 21:35:36,251 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1301 DAG size of output: 1067 [2021-03-10 21:35:36,416 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1580 DAG size of output: 1252 [2021-03-10 21:35:36,836 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 2166 DAG size of output: 1660 [2021-03-10 21:35:37,282 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 2901 DAG size of output: 1954 [2021-03-10 21:35:38,897 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1160 DAG size of output: 1072 [2021-03-10 21:35:40,528 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 1497 DAG size of output: 1405 [2021-03-10 21:35:41,009 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 3877 DAG size of output: 1995 [2021-03-10 21:35:43,072 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1465 DAG size of output: 1199 [2021-03-10 21:35:44,680 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1211 DAG size of output: 1041 [2021-03-10 21:35:44,828 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1485 DAG size of output: 1238 [2021-03-10 21:35:45,168 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 2321 DAG size of output: 1911 [2021-03-10 21:35:48,042 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 1642 DAG size of output: 1247 [2021-03-10 21:35:48,522 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 3250 DAG size of output: 2454 [2021-03-10 21:35:50,281 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1115 DAG size of output: 1084 [2021-03-10 21:35:51,739 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 912 DAG size of output: 745 [2021-03-10 21:35:51,987 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 1672 DAG size of output: 1539 [2021-03-10 21:35:52,262 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 1865 DAG size of output: 1685 [2021-03-10 21:35:52,798 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 4607 DAG size of output: 2561 [2021-03-10 21:35:53,802 WARN L205 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 6639 DAG size of output: 3850 [2021-03-10 21:35:55,611 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 10035 DAG size of output: 6098 [2021-03-10 21:35:57,426 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 10035 DAG size of output: 6098 [2021-03-10 21:35:59,419 WARN L205 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 10044 DAG size of output: 4867 [2021-03-10 21:36:01,355 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 4869 DAG size of output: 5961 [2021-03-10 21:36:02,099 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 3232 DAG size of output: 3201 [2021-03-10 21:36:02,442 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 1716 DAG size of output: 1601 [2021-03-10 21:36:02,656 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 886 DAG size of output: 1212 [2021-03-10 21:36:02,778 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 725 [2021-03-10 21:36:03,721 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 2147 DAG size of output: 1025 [2021-03-10 21:36:04,115 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 2055 DAG size of output: 1875 [2021-03-10 21:36:04,393 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 1040 DAG size of output: 1378 [2021-03-10 21:36:04,544 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 765 DAG size of output: 888 [2021-03-10 21:36:05,992 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1906 DAG size of output: 763 [2021-03-10 21:36:06,222 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 2754 DAG size of output: 1552 [2021-03-10 21:36:06,630 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 4500 DAG size of output: 2202 [2021-03-10 21:36:07,521 WARN L205 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 7316 DAG size of output: 3658 [2021-03-10 21:36:08,406 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 7316 DAG size of output: 3658 [2021-03-10 21:36:09,262 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 7318 DAG size of output: 3448 [2021-03-10 21:36:09,765 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 3448 DAG size of output: 2966 [2021-03-10 21:36:10,010 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 1721 DAG size of output: 1717 [2021-03-10 21:36:11,225 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 1172 [2021-03-10 21:36:13,348 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1224 DAG size of output: 705 [2021-03-10 21:36:13,492 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1780 DAG size of output: 1038 [2021-03-10 21:36:13,662 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1351 DAG size of output: 1338 [2021-03-10 21:36:16,119 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 2950 DAG size of output: 1671 [2021-03-10 21:36:16,371 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 2950 DAG size of output: 1671 [2021-03-10 21:36:16,649 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 2953 DAG size of output: 1617 [2021-03-10 21:36:16,895 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 1619 DAG size of output: 1920 [2021-03-10 21:36:17,031 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1439 DAG size of output: 1413 [2021-03-10 21:36:18,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:18,912 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:36:18,912 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:36:18,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:36:22,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:22,334 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:22,334 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:22,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:23,630 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:23,652 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:36:23,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:23,653 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:36:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:23,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:23,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:36:23,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107503042] [2021-03-10 21:36:23,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:36:23,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:23,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:36:23,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:36:23,684 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:36:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:24,291 INFO L93 Difference]: Finished difference Result 1132 states and 3572 transitions. [2021-03-10 21:36:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:36:24,292 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:36:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:24,293 INFO L225 Difference]: With dead ends: 1132 [2021-03-10 21:36:24,294 INFO L226 Difference]: Without dead ends: 1122 [2021-03-10 21:36:24,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 623.9ms TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:36:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-03-10 21:36:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1022. [2021-03-10 21:36:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-03-10 21:36:24,305 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-03-10 21:36:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:24,305 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-03-10 21:36:24,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:36:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-03-10 21:36:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:36:24,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:24,307 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:24,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38377,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:24,508 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:24,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:24,508 INFO L82 PathProgramCache]: Analyzing trace with hash 236725805, now seen corresponding path program 212 times [2021-03-10 21:36:24,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:24,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827857125] [2021-03-10 21:36:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:36:24,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827857125] [2021-03-10 21:36:24,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991135940] [2021-03-10 21:36:24,576 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 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 [2021-03-10 21:36:24,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:24,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:24,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:36:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:24,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:24,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:25,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:25,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:25,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:36:25,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:36:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:25,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:25,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 21:36:25,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247701439] [2021-03-10 21:36:25,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:36:25,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:25,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:36:25,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:36:25,612 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:25,883 INFO L93 Difference]: Finished difference Result 1044 states and 3364 transitions. [2021-03-10 21:36:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:36:25,884 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:36:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:25,885 INFO L225 Difference]: With dead ends: 1044 [2021-03-10 21:36:25,885 INFO L226 Difference]: Without dead ends: 1026 [2021-03-10 21:36:25,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:36:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-03-10 21:36:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 1022. [2021-03-10 21:36:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2634671890303624) internal successors, (3332), 1021 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3332 transitions. [2021-03-10 21:36:25,896 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3332 transitions. Word has length 20 [2021-03-10 21:36:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:25,896 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3332 transitions. [2021-03-10 21:36:25,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3332 transitions. [2021-03-10 21:36:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:36:25,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:25,897 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:26,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48382 [2021-03-10 21:36:26,098 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1839000147, now seen corresponding path program 213 times [2021-03-10 21:36:26,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:26,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606677821] [2021-03-10 21:36:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:36:26,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606677821] [2021-03-10 21:36:26,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304931301] [2021-03-10 21:36:26,185 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 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 [2021-03-10 21:36:26,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:36:26,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:26,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:36:26,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:26,598 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:26,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:26,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:27,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:28,264 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:36:28,265 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:36:28,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:36:29,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:29,716 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:36:29,716 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:36:29,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:36:30,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:30,970 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:30,971 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:30,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:33,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:33,384 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:36:33,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:33,385 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:36:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:33,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:33,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:36:33,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468981778] [2021-03-10 21:36:33,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:36:33,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:33,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:36:33,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:36:33,416 INFO L87 Difference]: Start difference. First operand 1022 states and 3332 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-03-10 21:36:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:34,034 INFO L93 Difference]: Finished difference Result 1110 states and 3492 transitions. [2021-03-10 21:36:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:36:34,035 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 20 [2021-03-10 21:36:34,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:34,037 INFO L225 Difference]: With dead ends: 1110 [2021-03-10 21:36:34,037 INFO L226 Difference]: Without dead ends: 1100 [2021-03-10 21:36:34,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 431.3ms TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:36:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-03-10 21:36:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1022. [2021-03-10 21:36:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2634671890303624) internal successors, (3332), 1021 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3332 transitions. [2021-03-10 21:36:34,049 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3332 transitions. Word has length 20 [2021-03-10 21:36:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:34,049 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3332 transitions. [2021-03-10 21:36:34,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-03-10 21:36:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3332 transitions. [2021-03-10 21:36:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:36:34,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:34,051 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:34,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48633 [2021-03-10 21:36:34,266 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:34,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1301144569, now seen corresponding path program 214 times [2021-03-10 21:36:34,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:34,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379953791] [2021-03-10 21:36:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:34,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379953791] [2021-03-10 21:36:34,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506872829] [2021-03-10 21:36:34,364 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 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 [2021-03-10 21:36:34,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:34,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:34,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:36:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:34,779 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:34,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:34,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:35,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:35,768 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:36:35,768 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:36:35,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:36:39,654 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 815 [2021-03-10 21:36:39,846 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1396 DAG size of output: 1198 [2021-03-10 21:36:40,076 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1532 DAG size of output: 1392 [2021-03-10 21:36:40,353 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 700 [2021-03-10 21:36:42,023 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1060 DAG size of output: 745 [2021-03-10 21:36:42,173 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1191 DAG size of output: 968 [2021-03-10 21:36:42,354 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1234 DAG size of output: 957 [2021-03-10 21:36:42,753 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 2306 DAG size of output: 1942 [2021-03-10 21:36:43,176 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 2306 DAG size of output: 1942 [2021-03-10 21:36:43,631 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 2314 DAG size of output: 1707 [2021-03-10 21:36:43,996 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 1540 [2021-03-10 21:36:44,128 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 711 DAG size of output: 765 [2021-03-10 21:36:44,233 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 770 [2021-03-10 21:36:45,992 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1941 DAG size of output: 1087 [2021-03-10 21:36:46,191 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 1941 DAG size of output: 1087 [2021-03-10 21:36:46,391 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 1945 DAG size of output: 968 [2021-03-10 21:36:46,517 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 970 DAG size of output: 684 [2021-03-10 21:36:47,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:47,755 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:36:47,755 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:36:47,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:36:48,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:48,897 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:48,897 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:48,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:49,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:49,601 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:36:49,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:49,602 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:36:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:49,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:49,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-03-10 21:36:49,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409906135] [2021-03-10 21:36:49,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:36:49,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:49,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:36:49,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:36:49,633 INFO L87 Difference]: Start difference. First operand 1022 states and 3332 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:50,323 INFO L93 Difference]: Finished difference Result 1167 states and 3613 transitions. [2021-03-10 21:36:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:36:50,323 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:36:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:50,325 INFO L225 Difference]: With dead ends: 1167 [2021-03-10 21:36:50,325 INFO L226 Difference]: Without dead ends: 1138 [2021-03-10 21:36:50,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 568.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:36:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-03-10 21:36:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1013. [2021-03-10 21:36:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.257905138339921) internal successors, (3297), 1012 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3297 transitions. [2021-03-10 21:36:50,336 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3297 transitions. Word has length 20 [2021-03-10 21:36:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:50,336 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3297 transitions. [2021-03-10 21:36:50,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3297 transitions. [2021-03-10 21:36:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:36:50,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:50,338 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:50,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:50,538 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash 188260427, now seen corresponding path program 215 times [2021-03-10 21:36:50,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:50,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735420024] [2021-03-10 21:36:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:50,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735420024] [2021-03-10 21:36:50,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188312926] [2021-03-10 21:36:50,642 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 [2021-03-10 21:36:50,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:36:50,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:50,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:36:50,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:51,084 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:51,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:51,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:36:51,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:36:52,260 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:36:52,260 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:36:52,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:36:55,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:55,752 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:36:55,752 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:36:55,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:36:57,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:57,265 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:36:57,266 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:36:57,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:36:58,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:36:58,561 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:36:58,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:36:58,561 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:36:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:58,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:58,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-03-10 21:36:58,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547430750] [2021-03-10 21:36:58,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:36:58,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:36:58,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:36:58,593 INFO L87 Difference]: Start difference. First operand 1013 states and 3297 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:59,104 INFO L93 Difference]: Finished difference Result 1092 states and 3464 transitions. [2021-03-10 21:36:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:36:59,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:36:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:59,106 INFO L225 Difference]: With dead ends: 1092 [2021-03-10 21:36:59,106 INFO L226 Difference]: Without dead ends: 1082 [2021-03-10 21:36:59,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:36:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-03-10 21:36:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1014. [2021-03-10 21:36:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 3.2576505429417573) internal successors, (3300), 1013 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:59,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 3300 transitions. [2021-03-10 21:36:59,117 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 3300 transitions. Word has length 20 [2021-03-10 21:36:59,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:59,117 INFO L480 AbstractCegarLoop]: Abstraction has 1014 states and 3300 transitions. [2021-03-10 21:36:59,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:59,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 3300 transitions. [2021-03-10 21:36:59,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:36:59,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:59,118 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:59,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52406 [2021-03-10 21:36:59,319 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1807490835, now seen corresponding path program 216 times [2021-03-10 21:36:59,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:59,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729823434] [2021-03-10 21:36:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:59,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729823434] [2021-03-10 21:36:59,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160800769] [2021-03-10 21:36:59,419 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 [2021-03-10 21:36:59,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:36:59,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:59,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:36:59,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:59,823 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:36:59,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:36:59,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:01,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:01,793 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:37:01,793 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:37:01,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:37:04,353 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 797 DAG size of output: 675 [2021-03-10 21:37:04,488 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 810 DAG size of output: 688 [2021-03-10 21:37:04,820 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 896 DAG size of output: 763 [2021-03-10 21:37:04,963 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 999 DAG size of output: 844 [2021-03-10 21:37:05,137 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 1033 DAG size of output: 875 [2021-03-10 21:37:05,328 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 1251 DAG size of output: 1052 [2021-03-10 21:37:05,497 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1251 DAG size of output: 1052 [2021-03-10 21:37:05,690 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 1259 DAG size of output: 987 [2021-03-10 21:37:05,815 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 987 DAG size of output: 914 [2021-03-10 21:37:06,186 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 562 [2021-03-10 21:37:07,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:08,091 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:37:08,092 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:37:08,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:37:08,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:08,956 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:08,957 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:08,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:09,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:10,024 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:37:10,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:10,025 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:37:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:10,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:10,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:37:10,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127961611] [2021-03-10 21:37:10,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:37:10,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:10,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:37:10,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:37:10,060 INFO L87 Difference]: Start difference. First operand 1014 states and 3300 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:37:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:10,901 INFO L93 Difference]: Finished difference Result 1229 states and 3755 transitions. [2021-03-10 21:37:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:37:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:37:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:10,903 INFO L225 Difference]: With dead ends: 1229 [2021-03-10 21:37:10,903 INFO L226 Difference]: Without dead ends: 1193 [2021-03-10 21:37:10,904 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 652.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:37:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-03-10 21:37:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1013. [2021-03-10 21:37:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2509881422924902) internal successors, (3290), 1012 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3290 transitions. [2021-03-10 21:37:10,915 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3290 transitions. Word has length 20 [2021-03-10 21:37:10,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:10,915 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3290 transitions. [2021-03-10 21:37:10,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:37:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3290 transitions. [2021-03-10 21:37:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:37:10,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:10,916 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:11,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54536 [2021-03-10 21:37:11,117 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:11,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:11,117 INFO L82 PathProgramCache]: Analyzing trace with hash -318085839, now seen corresponding path program 217 times [2021-03-10 21:37:11,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:11,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460443124] [2021-03-10 21:37:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:11,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460443124] [2021-03-10 21:37:11,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530918837] [2021-03-10 21:37:11,235 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 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 [2021-03-10 21:37:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:11,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:37:11,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:11,693 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:11,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:11,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:12,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:12,830 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:37:12,830 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:37:12,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:37:16,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:16,572 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:37:16,573 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:37:16,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:37:18,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:18,519 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:18,520 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:18,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:19,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:19,160 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:37:19,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:19,161 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:37:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:19,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:19,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:37:19,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298273307] [2021-03-10 21:37:19,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:37:19,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:19,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:37:19,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:37:19,195 INFO L87 Difference]: Start difference. First operand 1013 states and 3290 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:37:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:19,831 INFO L93 Difference]: Finished difference Result 1112 states and 3506 transitions. [2021-03-10 21:37:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:37:19,832 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:37:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:19,833 INFO L225 Difference]: With dead ends: 1112 [2021-03-10 21:37:19,833 INFO L226 Difference]: Without dead ends: 1102 [2021-03-10 21:37:19,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 620.2ms TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:37:19,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-03-10 21:37:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1013. [2021-03-10 21:37:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2509881422924902) internal successors, (3290), 1012 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3290 transitions. [2021-03-10 21:37:19,844 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3290 transitions. Word has length 20 [2021-03-10 21:37:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:19,844 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3290 transitions. [2021-03-10 21:37:19,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:37:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3290 transitions. [2021-03-10 21:37:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:37:19,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:19,846 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:20,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56917 [2021-03-10 21:37:20,061 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:20,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1391171219, now seen corresponding path program 218 times [2021-03-10 21:37:20,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:20,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921144397] [2021-03-10 21:37:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:20,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921144397] [2021-03-10 21:37:20,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249251194] [2021-03-10 21:37:20,160 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 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 [2021-03-10 21:37:20,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:37:20,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:20,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:37:20,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:20,607 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:20,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:20,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:21,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:22,010 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:37:22,010 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:37:22,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:37:27,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:27,432 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:37:27,432 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:37:27,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:37:28,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:28,617 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:28,617 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:28,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:37:30,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:30,622 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:37:30,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:37:30,623 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:37:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:30,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:30,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:37:30,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136999534] [2021-03-10 21:37:30,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:37:30,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:30,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:37:30,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:37:30,658 INFO L87 Difference]: Start difference. First operand 1013 states and 3290 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:37:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:31,338 INFO L93 Difference]: Finished difference Result 1124 states and 3536 transitions. [2021-03-10 21:37:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:37:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:37:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:31,340 INFO L225 Difference]: With dead ends: 1124 [2021-03-10 21:37:31,340 INFO L226 Difference]: Without dead ends: 1114 [2021-03-10 21:37:31,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:37:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-03-10 21:37:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1013. [2021-03-10 21:37:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2509881422924902) internal successors, (3290), 1012 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3290 transitions. [2021-03-10 21:37:31,351 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3290 transitions. Word has length 20 [2021-03-10 21:37:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:31,351 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3290 transitions. [2021-03-10 21:37:31,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:37:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3290 transitions. [2021-03-10 21:37:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:37:31,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:31,353 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:31,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58394,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:31,567 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:31,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1401123561, now seen corresponding path program 219 times [2021-03-10 21:37:31,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:31,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14324385] [2021-03-10 21:37:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:31,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14324385] [2021-03-10 21:37:31,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286201067] [2021-03-10 21:37:31,686 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 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 [2021-03-10 21:37:31,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:37:31,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:31,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:37:31,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:32,158 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:32,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:32,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:34,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:34,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:34,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:37:34,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:37:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:34,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:34,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:37:34,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086067119] [2021-03-10 21:37:34,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:37:34,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:34,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:37:34,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:37:34,929 INFO L87 Difference]: Start difference. First operand 1013 states and 3290 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:37:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:35,661 INFO L93 Difference]: Finished difference Result 1152 states and 3681 transitions. [2021-03-10 21:37:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:37:35,661 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:37:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:35,663 INFO L225 Difference]: With dead ends: 1152 [2021-03-10 21:37:35,663 INFO L226 Difference]: Without dead ends: 1134 [2021-03-10 21:37:35,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:37:35,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-03-10 21:37:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1083. [2021-03-10 21:37:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 3.2597042513863217) internal successors, (3527), 1082 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 3527 transitions. [2021-03-10 21:37:35,676 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 3527 transitions. Word has length 20 [2021-03-10 21:37:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:35,676 INFO L480 AbstractCegarLoop]: Abstraction has 1083 states and 3527 transitions. [2021-03-10 21:37:35,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:37:35,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 3527 transitions. [2021-03-10 21:37:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:37:35,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:35,677 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:35,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60821 [2021-03-10 21:37:35,878 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:35,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2034969205, now seen corresponding path program 220 times [2021-03-10 21:37:35,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:35,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137452670] [2021-03-10 21:37:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:36,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137452670] [2021-03-10 21:37:36,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364905562] [2021-03-10 21:37:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:37:36,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:37:36,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:36,026 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:37:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:36,453 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:37:36,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:36,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:37:37,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:37,910 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:37:37,910 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:37:37,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:37:41,774 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 1552 DAG size of output: 1319 [2021-03-10 21:37:41,984 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 1737 DAG size of output: 1467 [2021-03-10 21:37:45,210 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1434 DAG size of output: 1071 [2021-03-10 21:37:47,667 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1143 DAG size of output: 932 [2021-03-10 21:37:47,908 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 2220 DAG size of output: 1675 [2021-03-10 21:37:48,164 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 2377 DAG size of output: 1728 [2021-03-10 21:37:48,560 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 3712 DAG size of output: 2103 [2021-03-10 21:37:48,969 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 3917 DAG size of output: 2236 [2021-03-10 21:37:49,399 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 3917 DAG size of output: 2236 [2021-03-10 21:37:49,856 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 3925 DAG size of output: 2095 [2021-03-10 21:37:50,289 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 2097 DAG size of output: 2304 [2021-03-10 21:37:50,729 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 1924 DAG size of output: 2388 [2021-03-10 21:37:50,923 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 1438 [2021-03-10 21:37:51,311 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 1340 DAG size of output: 1594 [2021-03-10 21:37:52,117 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1623 DAG size of output: 1127 [2021-03-10 21:37:52,301 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1777 DAG size of output: 1199 [2021-03-10 21:37:52,472 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 1203 [2021-03-10 21:37:52,584 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1058 DAG size of output: 1057 [2021-03-10 21:37:53,929 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 2825 DAG size of output: 1765 [2021-03-10 21:37:54,247 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 3256 DAG size of output: 2106 [2021-03-10 21:37:54,583 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 3256 DAG size of output: 2106 [2021-03-10 21:37:54,942 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 3260 DAG size of output: 1866 [2021-03-10 21:37:55,174 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 1866 DAG size of output: 1756 [2021-03-10 21:37:55,409 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1505 DAG size of output: 1503 [2021-03-10 21:37:55,882 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1001 DAG size of output: 1001 [2021-03-10 21:37:57,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:57,561 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:37:57,562 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:37:57,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:37:59,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:37:59,577 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:37:59,577 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:37:59,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:00,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:00,194 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:38:00,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:00,195 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:38:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:00,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:00,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:38:00,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713778264] [2021-03-10 21:38:00,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:38:00,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:00,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:38:00,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:38:00,231 INFO L87 Difference]: Start difference. First operand 1083 states and 3527 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:38:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:01,268 INFO L93 Difference]: Finished difference Result 1287 states and 4000 transitions. [2021-03-10 21:38:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:38:01,269 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:38:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:01,271 INFO L225 Difference]: With dead ends: 1287 [2021-03-10 21:38:01,271 INFO L226 Difference]: Without dead ends: 1261 [2021-03-10 21:38:01,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 739.6ms TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:38:01,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-03-10 21:38:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1094. [2021-03-10 21:38:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.264409881061299) internal successors, (3568), 1093 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3568 transitions. [2021-03-10 21:38:01,283 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3568 transitions. Word has length 20 [2021-03-10 21:38:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:01,283 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 3568 transitions. [2021-03-10 21:38:01,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:38:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3568 transitions. [2021-03-10 21:38:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:38:01,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:01,285 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:01,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61659,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:01,487 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:01,488 INFO L82 PathProgramCache]: Analyzing trace with hash -324355897, now seen corresponding path program 221 times [2021-03-10 21:38:01,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:01,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631815085] [2021-03-10 21:38:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:01,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631815085] [2021-03-10 21:38:01,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664145999] [2021-03-10 21:38:01,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:38:01,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:38:01,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:01,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:38:01,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:02,113 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:02,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:02,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:03,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:04,262 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:38:04,263 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:38:04,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:38:06,274 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 942 DAG size of output: 1225 [2021-03-10 21:38:06,404 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 899 DAG size of output: 1119 [2021-03-10 21:38:06,534 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 890 DAG size of output: 1197 [2021-03-10 21:38:08,988 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1373 DAG size of output: 865 [2021-03-10 21:38:11,130 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1232 DAG size of output: 1016 [2021-03-10 21:38:12,269 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1707 DAG size of output: 1387 [2021-03-10 21:38:12,996 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 2023 DAG size of output: 1586 [2021-03-10 21:38:13,223 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 2034 DAG size of output: 1597 [2021-03-10 21:38:13,585 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 2917 DAG size of output: 2148 [2021-03-10 21:38:13,958 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 3311 DAG size of output: 2211 [2021-03-10 21:38:17,656 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1103 DAG size of output: 915 [2021-03-10 21:38:18,717 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1590 DAG size of output: 1258 [2021-03-10 21:38:18,925 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 1623 DAG size of output: 1282 [2021-03-10 21:38:19,253 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 2465 DAG size of output: 1821 [2021-03-10 21:38:19,585 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 2554 DAG size of output: 1907 [2021-03-10 21:38:20,169 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 5239 DAG size of output: 2986 [2021-03-10 21:38:20,737 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 5239 DAG size of output: 2986 [2021-03-10 21:38:21,358 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 5246 DAG size of output: 2892 [2021-03-10 21:38:21,883 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 2894 DAG size of output: 2814 [2021-03-10 21:38:22,474 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 2793 DAG size of output: 3104 [2021-03-10 21:38:22,919 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 2733 DAG size of output: 2732 [2021-03-10 21:38:23,284 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 2709 DAG size of output: 2707 [2021-03-10 21:38:23,721 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 1730 DAG size of output: 2393 [2021-03-10 21:38:24,042 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 1673 DAG size of output: 1979 [2021-03-10 21:38:24,253 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 1632 DAG size of output: 1632 [2021-03-10 21:38:24,470 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 1585 [2021-03-10 21:38:25,379 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1201 DAG size of output: 1201 [2021-03-10 21:38:25,554 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 1177 [2021-03-10 21:38:27,676 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1801 DAG size of output: 969 [2021-03-10 21:38:27,908 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 2632 DAG size of output: 1574 [2021-03-10 21:38:28,153 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 1291 DAG size of output: 1597 [2021-03-10 21:38:28,345 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1288 DAG size of output: 1483 [2021-03-10 21:38:28,474 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1269 DAG size of output: 1266 [2021-03-10 21:38:28,679 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 1234 [2021-03-10 21:38:30,582 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1658 DAG size of output: 1043 [2021-03-10 21:38:30,938 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 3940 DAG size of output: 2067 [2021-03-10 21:38:31,338 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 3972 DAG size of output: 2088 [2021-03-10 21:38:31,769 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 4358 DAG size of output: 2320 [2021-03-10 21:38:32,245 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 4446 DAG size of output: 2402 [2021-03-10 21:38:32,701 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 4446 DAG size of output: 2402 [2021-03-10 21:38:33,183 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 4449 DAG size of output: 2196 [2021-03-10 21:38:33,513 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 2198 DAG size of output: 2123 [2021-03-10 21:38:33,748 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 1933 DAG size of output: 1866 [2021-03-10 21:38:34,044 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 1814 DAG size of output: 1812 [2021-03-10 21:38:34,374 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1626 DAG size of output: 1626 [2021-03-10 21:38:34,701 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 1612 DAG size of output: 1789 [2021-03-10 21:38:34,823 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1188 DAG size of output: 1185 [2021-03-10 21:38:35,639 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1009 DAG size of output: 997 [2021-03-10 21:38:36,608 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1774 DAG size of output: 796 [2021-03-10 21:38:36,726 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1828 DAG size of output: 805 [2021-03-10 21:38:36,899 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 2025 DAG size of output: 950 [2021-03-10 21:38:37,047 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 2025 DAG size of output: 950 [2021-03-10 21:38:37,211 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 2029 DAG size of output: 856 [2021-03-10 21:38:37,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:38,179 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:38:38,180 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:38:38,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:38:41,084 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1740 DAG size of output: 1072 [2021-03-10 21:38:41,203 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1740 DAG size of output: 1072 [2021-03-10 21:38:41,335 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1745 DAG size of output: 959 [2021-03-10 21:38:42,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:43,113 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:38:43,113 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:38:43,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:38:46,309 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 2207 DAG size of output: 1109 [2021-03-10 21:38:46,429 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 2207 DAG size of output: 1109 [2021-03-10 21:38:46,559 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 2214 DAG size of output: 1067 [2021-03-10 21:38:47,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:38:47,735 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:38:47,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:38:47,736 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:38:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:47,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:47,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:38:47,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167817626] [2021-03-10 21:38:47,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:38:47,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:38:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:38:47,771 INFO L87 Difference]: Start difference. First operand 1094 states and 3568 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:38:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:48,999 INFO L93 Difference]: Finished difference Result 1419 states and 4315 transitions. [2021-03-10 21:38:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:38:48,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:38:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:49,001 INFO L225 Difference]: With dead ends: 1419 [2021-03-10 21:38:49,002 INFO L226 Difference]: Without dead ends: 1368 [2021-03-10 21:38:49,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 952.1ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:38:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-03-10 21:38:49,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1101. [2021-03-10 21:38:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2572727272727273) internal successors, (3583), 1100 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3583 transitions. [2021-03-10 21:38:49,016 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3583 transitions. Word has length 20 [2021-03-10 21:38:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:49,016 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3583 transitions. [2021-03-10 21:38:49,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:38:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3583 transitions. [2021-03-10 21:38:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:38:49,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:49,017 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:49,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66851 [2021-03-10 21:38:49,218 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:49,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1165049099, now seen corresponding path program 222 times [2021-03-10 21:38:49,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:49,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810412169] [2021-03-10 21:38:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:49,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810412169] [2021-03-10 21:38:49,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061332207] [2021-03-10 21:38:49,338 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 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 [2021-03-10 21:38:49,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:38:49,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:49,357 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:38:49,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:49,756 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:38:49,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:49,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:38:50,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:50,664 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:38:50,665 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:38:50,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:38:53,958 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1495 DAG size of output: 1041 [2021-03-10 21:38:56,135 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 2068 DAG size of output: 1481 [2021-03-10 21:38:59,110 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 1191 DAG size of output: 969 [2021-03-10 21:39:01,562 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1107 DAG size of output: 784 [2021-03-10 21:39:01,878 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 1943 DAG size of output: 1495 [2021-03-10 21:39:02,199 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 2153 DAG size of output: 1690 [2021-03-10 21:39:02,802 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 3881 DAG size of output: 2793 [2021-03-10 21:39:03,382 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 3881 DAG size of output: 2793 [2021-03-10 21:39:04,022 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 3887 DAG size of output: 2794 [2021-03-10 21:39:04,689 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 2796 DAG size of output: 3210 [2021-03-10 21:39:05,003 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 2682 DAG size of output: 1819 [2021-03-10 21:39:05,314 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1830 [2021-03-10 21:39:05,485 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1469 DAG size of output: 1468 [2021-03-10 21:39:07,741 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 807 [2021-03-10 21:39:09,451 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1572 DAG size of output: 922 [2021-03-10 21:39:09,625 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 2034 DAG size of output: 1159 [2021-03-10 21:39:09,844 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 2356 DAG size of output: 1348 [2021-03-10 21:39:10,131 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 2911 DAG size of output: 1644 [2021-03-10 21:39:10,395 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 2911 DAG size of output: 1644 [2021-03-10 21:39:10,690 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 2917 DAG size of output: 1574 [2021-03-10 21:39:10,924 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1576 DAG size of output: 1448 [2021-03-10 21:39:11,132 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 1393 DAG size of output: 1429 [2021-03-10 21:39:11,287 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1369 DAG size of output: 1364 [2021-03-10 21:39:11,423 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1212 DAG size of output: 1141 [2021-03-10 21:39:11,653 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1058 DAG size of output: 900 [2021-03-10 21:39:13,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:13,782 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:39:13,783 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:39:13,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:39:14,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:15,173 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:15,173 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:15,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:16,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:16,393 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:39:16,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:16,393 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:39:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:16,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:16,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:39:16,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497570682] [2021-03-10 21:39:16,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:39:16,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:16,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:39:16,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:39:16,429 INFO L87 Difference]: Start difference. First operand 1101 states and 3583 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:39:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:17,404 INFO L93 Difference]: Finished difference Result 1223 states and 3861 transitions. [2021-03-10 21:39:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:39:17,404 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:39:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:17,406 INFO L225 Difference]: With dead ends: 1223 [2021-03-10 21:39:17,406 INFO L226 Difference]: Without dead ends: 1213 [2021-03-10 21:39:17,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:39:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-03-10 21:39:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1101. [2021-03-10 21:39:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2572727272727273) internal successors, (3583), 1100 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3583 transitions. [2021-03-10 21:39:17,419 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3583 transitions. Word has length 20 [2021-03-10 21:39:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:17,419 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3583 transitions. [2021-03-10 21:39:17,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:39:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3583 transitions. [2021-03-10 21:39:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:39:17,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:17,420 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:17,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74314,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:17,621 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash 91963719, now seen corresponding path program 223 times [2021-03-10 21:39:17,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:17,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132302915] [2021-03-10 21:39:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:17,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132302915] [2021-03-10 21:39:17,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323743610] [2021-03-10 21:39:17,749 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 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 [2021-03-10 21:39:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:17,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:39:17,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:18,238 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:18,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:18,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:19,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:19,898 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:39:19,899 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:39:19,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:39:21,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:21,813 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:39:21,814 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:39:21,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:39:22,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:22,582 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:22,582 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:22,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:22,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:23,001 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:39:23,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:23,002 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:39:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:23,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:23,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:39:23,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131621184] [2021-03-10 21:39:23,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:39:23,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:23,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:39:23,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:39:23,037 INFO L87 Difference]: Start difference. First operand 1101 states and 3583 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:39:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:23,700 INFO L93 Difference]: Finished difference Result 1245 states and 3912 transitions. [2021-03-10 21:39:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:39:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:39:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:23,703 INFO L225 Difference]: With dead ends: 1245 [2021-03-10 21:39:23,703 INFO L226 Difference]: Without dead ends: 1235 [2021-03-10 21:39:23,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 736.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:39:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-03-10 21:39:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1101. [2021-03-10 21:39:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2572727272727273) internal successors, (3583), 1100 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3583 transitions. [2021-03-10 21:39:23,715 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3583 transitions. Word has length 20 [2021-03-10 21:39:23,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:23,716 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3583 transitions. [2021-03-10 21:39:23,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:39:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3583 transitions. [2021-03-10 21:39:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:39:23,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:23,717 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:23,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78940,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:23,917 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:23,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:23,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1186055307, now seen corresponding path program 224 times [2021-03-10 21:39:23,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:23,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606469074] [2021-03-10 21:39:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:24,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606469074] [2021-03-10 21:39:24,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136677591] [2021-03-10 21:39:24,060 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 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 [2021-03-10 21:39:24,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:39:24,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:24,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:39:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:24,596 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:24,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:24,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:25,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:26,136 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:39:26,137 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:39:26,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:39:29,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:29,759 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:39:29,760 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:39:29,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:39:32,222 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1232 DAG size of output: 916 [2021-03-10 21:39:33,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:33,643 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:33,643 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:33,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:36,110 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1430 DAG size of output: 962 [2021-03-10 21:39:36,222 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1430 DAG size of output: 962 [2021-03-10 21:39:36,345 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1437 DAG size of output: 961 [2021-03-10 21:39:37,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:37,197 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:39:37,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:37,198 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:39:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:37,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:37,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:39:37,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988557660] [2021-03-10 21:39:37,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:39:37,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:37,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:39:37,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:39:37,237 INFO L87 Difference]: Start difference. First operand 1101 states and 3583 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:39:38,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:38,181 INFO L93 Difference]: Finished difference Result 1256 states and 3935 transitions. [2021-03-10 21:39:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:39:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:39:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:38,183 INFO L225 Difference]: With dead ends: 1256 [2021-03-10 21:39:38,183 INFO L226 Difference]: Without dead ends: 1246 [2021-03-10 21:39:38,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 871.5ms TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:39:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-03-10 21:39:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1101. [2021-03-10 21:39:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2572727272727273) internal successors, (3583), 1100 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3583 transitions. [2021-03-10 21:39:38,196 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3583 transitions. Word has length 20 [2021-03-10 21:39:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:38,196 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3583 transitions. [2021-03-10 21:39:38,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:39:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3583 transitions. [2021-03-10 21:39:38,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:39:38,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:38,198 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:38,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79987,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:38,398 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:38,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1474726761, now seen corresponding path program 225 times [2021-03-10 21:39:38,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:38,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421495698] [2021-03-10 21:39:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:39:38,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421495698] [2021-03-10 21:39:38,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400401747] [2021-03-10 21:39:38,498 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 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 [2021-03-10 21:39:38,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:39:38,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:38,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:39:38,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:38,947 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:38,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:38,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:39,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:39,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:39,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:39:39,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:39:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:39,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:39:39,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390164706] [2021-03-10 21:39:39,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:39:39,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:39:39,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:39:39,668 INFO L87 Difference]: Start difference. First operand 1101 states and 3583 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-03-10 21:39:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:40,193 INFO L93 Difference]: Finished difference Result 1134 states and 3635 transitions. [2021-03-10 21:39:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:39:40,194 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 20 [2021-03-10 21:39:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:40,196 INFO L225 Difference]: With dead ends: 1134 [2021-03-10 21:39:40,196 INFO L226 Difference]: Without dead ends: 1116 [2021-03-10 21:39:40,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:39:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-03-10 21:39:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1101. [2021-03-10 21:39:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2563636363636363) internal successors, (3582), 1100 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3582 transitions. [2021-03-10 21:39:40,208 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3582 transitions. Word has length 20 [2021-03-10 21:39:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:40,208 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3582 transitions. [2021-03-10 21:39:40,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-03-10 21:39:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3582 transitions. [2021-03-10 21:39:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:39:40,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:40,209 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:40,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82635 [2021-03-10 21:39:40,410 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:40,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1523192139, now seen corresponding path program 226 times [2021-03-10 21:39:40,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:40,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591999855] [2021-03-10 21:39:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:39:40,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591999855] [2021-03-10 21:39:40,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611406882] [2021-03-10 21:39:40,518 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 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 [2021-03-10 21:39:40,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:39:40,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:40,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:39:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:41,019 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:41,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:41,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:41,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:42,048 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:39:42,048 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:39:42,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:39:45,810 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1644 DAG size of output: 1042 [2021-03-10 21:39:45,992 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1762 DAG size of output: 1121 [2021-03-10 21:39:46,158 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1762 DAG size of output: 1121 [2021-03-10 21:39:46,341 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1772 DAG size of output: 1079 [2021-03-10 21:39:46,542 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1081 DAG size of output: 1243 [2021-03-10 21:39:46,660 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 971 [2021-03-10 21:39:46,834 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 907 DAG size of output: 1019 [2021-03-10 21:39:48,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:49,011 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:39:49,012 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:39:49,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:39:49,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:49,934 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:39:49,935 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:39:49,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:39:50,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:39:50,495 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:39:50,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:39:50,496 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:39:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:50,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:39:50,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-03-10 21:39:50,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485330863] [2021-03-10 21:39:50,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:39:50,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:39:50,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:39:50,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:39:50,532 INFO L87 Difference]: Start difference. First operand 1101 states and 3582 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:39:51,367 INFO L93 Difference]: Finished difference Result 1226 states and 3844 transitions. [2021-03-10 21:39:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:39:51,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:39:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:39:51,370 INFO L225 Difference]: With dead ends: 1226 [2021-03-10 21:39:51,370 INFO L226 Difference]: Without dead ends: 1216 [2021-03-10 21:39:51,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:39:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-03-10 21:39:51,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1101. [2021-03-10 21:39:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2563636363636363) internal successors, (3582), 1100 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3582 transitions. [2021-03-10 21:39:51,383 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3582 transitions. Word has length 20 [2021-03-10 21:39:51,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:39:51,383 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 3582 transitions. [2021-03-10 21:39:51,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:39:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3582 transitions. [2021-03-10 21:39:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:39:51,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:39:51,384 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:39:51,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82913,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:39:51,585 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:39:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:39:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2029538405, now seen corresponding path program 227 times [2021-03-10 21:39:51,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:39:51,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004331265] [2021-03-10 21:39:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:39:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:39:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:39:51,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004331265] [2021-03-10 21:39:51,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955650321] [2021-03-10 21:39:51,691 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 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 [2021-03-10 21:39:51,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:39:51,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:39:51,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:39:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:39:52,135 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:39:52,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:39:52,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:39:53,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:39:53,956 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:39:53,957 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:39:53,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:39:58,334 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1577 DAG size of output: 804 [2021-03-10 21:39:58,465 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1720 DAG size of output: 875 [2021-03-10 21:39:58,598 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1720 DAG size of output: 875 [2021-03-10 21:39:58,746 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1730 DAG size of output: 823 [2021-03-10 21:39:58,906 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 888 [2021-03-10 21:40:00,428 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1074 DAG size of output: 658 [2021-03-10 21:40:00,646 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 839 [2021-03-10 21:40:00,776 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 839 [2021-03-10 21:40:00,911 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1561 DAG size of output: 841 [2021-03-10 21:40:01,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:02,249 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:40:02,249 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:40:02,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:40:03,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:03,933 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:03,934 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:03,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:04,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:04,698 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:40:04,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:04,699 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:40:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:04,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:04,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:40:04,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54927624] [2021-03-10 21:40:04,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:40:04,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:04,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:40:04,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:40:04,736 INFO L87 Difference]: Start difference. First operand 1101 states and 3582 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:40:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:05,816 INFO L93 Difference]: Finished difference Result 1304 states and 4040 transitions. [2021-03-10 21:40:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:40:05,817 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:40:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:05,819 INFO L225 Difference]: With dead ends: 1304 [2021-03-10 21:40:05,819 INFO L226 Difference]: Without dead ends: 1275 [2021-03-10 21:40:05,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 806.4ms TimeCoverageRelationStatistics Valid=238, Invalid=1654, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:40:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-03-10 21:40:05,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1087. [2021-03-10 21:40:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.2523020257826887) internal successors, (3532), 1086 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3532 transitions. [2021-03-10 21:40:05,832 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3532 transitions. Word has length 20 [2021-03-10 21:40:05,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:05,832 INFO L480 AbstractCegarLoop]: Abstraction has 1087 states and 3532 transitions. [2021-03-10 21:40:05,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:40:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3532 transitions. [2021-03-10 21:40:05,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:40:05,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:05,834 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:06,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84589,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:06,034 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:06,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1192343511, now seen corresponding path program 228 times [2021-03-10 21:40:06,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:06,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535786740] [2021-03-10 21:40:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:06,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535786740] [2021-03-10 21:40:06,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614753240] [2021-03-10 21:40:06,183 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:40:06,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:40:06,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:06,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:40:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:06,740 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:06,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:06,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:07,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:08,224 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:40:08,225 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:40:08,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:40:09,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:09,764 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:40:09,764 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:40:09,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:40:10,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:10,619 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:10,620 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:10,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:13,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:13,546 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:40:13,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:13,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:40:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:13,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:13,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:40:13,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175923891] [2021-03-10 21:40:13,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:40:13,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:13,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:40:13,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:40:13,584 INFO L87 Difference]: Start difference. First operand 1087 states and 3532 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:40:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:14,427 INFO L93 Difference]: Finished difference Result 1205 states and 3790 transitions. [2021-03-10 21:40:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:40:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:40:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:14,430 INFO L225 Difference]: With dead ends: 1205 [2021-03-10 21:40:14,430 INFO L226 Difference]: Without dead ends: 1195 [2021-03-10 21:40:14,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 831.3ms TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:40:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-03-10 21:40:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1088. [2021-03-10 21:40:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.252069917203312) internal successors, (3535), 1087 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3535 transitions. [2021-03-10 21:40:14,443 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3535 transitions. Word has length 20 [2021-03-10 21:40:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:14,443 INFO L480 AbstractCegarLoop]: Abstraction has 1088 states and 3535 transitions. [2021-03-10 21:40:14,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:40:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3535 transitions. [2021-03-10 21:40:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:40:14,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:14,444 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:14,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88114,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:14,644 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash -546403467, now seen corresponding path program 229 times [2021-03-10 21:40:14,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:14,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952026097] [2021-03-10 21:40:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:14,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952026097] [2021-03-10 21:40:14,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490411606] [2021-03-10 21:40:14,787 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 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 [2021-03-10 21:40:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:14,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:40:14,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:15,281 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:15,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:15,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:15,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:16,294 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:40:16,295 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:40:16,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:40:18,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:18,431 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:40:18,432 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:40:18,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:40:20,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:20,820 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:20,820 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:20,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:21,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:21,811 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:40:21,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:21,812 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:40:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:21,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:21,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:40:21,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352211343] [2021-03-10 21:40:21,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:40:21,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:40:21,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:40:21,850 INFO L87 Difference]: Start difference. First operand 1088 states and 3535 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:40:23,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:23,217 INFO L93 Difference]: Finished difference Result 1402 states and 4255 transitions. [2021-03-10 21:40:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:40:23,218 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:40:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:23,220 INFO L225 Difference]: With dead ends: 1402 [2021-03-10 21:40:23,220 INFO L226 Difference]: Without dead ends: 1361 [2021-03-10 21:40:23,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1060.9ms TimeCoverageRelationStatistics Valid=317, Invalid=2335, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:40:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-03-10 21:40:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1091. [2021-03-10 21:40:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 3.244954128440367) internal successors, (3537), 1090 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 3537 transitions. [2021-03-10 21:40:23,234 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 3537 transitions. Word has length 20 [2021-03-10 21:40:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:23,234 INFO L480 AbstractCegarLoop]: Abstraction has 1091 states and 3537 transitions. [2021-03-10 21:40:23,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:40:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 3537 transitions. [2021-03-10 21:40:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:40:23,235 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:23,235 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:23,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89868 [2021-03-10 21:40:23,451 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:23,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:23,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1619488847, now seen corresponding path program 230 times [2021-03-10 21:40:23,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:23,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761425690] [2021-03-10 21:40:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:23,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761425690] [2021-03-10 21:40:23,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729292864] [2021-03-10 21:40:23,574 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 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 [2021-03-10 21:40:23,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:40:23,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:23,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:40:23,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:24,138 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:24,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:24,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:24,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:25,162 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:40:25,163 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:40:25,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:40:27,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:27,621 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:40:27,622 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:40:27,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:40:30,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:30,716 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:30,716 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:30,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:32,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:32,286 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:40:32,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:32,287 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:40:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:32,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:32,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:40:32,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433363010] [2021-03-10 21:40:32,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:40:32,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:40:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:40:32,322 INFO L87 Difference]: Start difference. First operand 1091 states and 3537 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:40:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:33,010 INFO L93 Difference]: Finished difference Result 1239 states and 3871 transitions. [2021-03-10 21:40:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:40:33,010 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:40:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:33,012 INFO L225 Difference]: With dead ends: 1239 [2021-03-10 21:40:33,012 INFO L226 Difference]: Without dead ends: 1229 [2021-03-10 21:40:33,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 796.3ms TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:40:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-03-10 21:40:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1091. [2021-03-10 21:40:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 3.244954128440367) internal successors, (3537), 1090 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 3537 transitions. [2021-03-10 21:40:33,023 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 3537 transitions. Word has length 20 [2021-03-10 21:40:33,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:33,023 INFO L480 AbstractCegarLoop]: Abstraction has 1091 states and 3537 transitions. [2021-03-10 21:40:33,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:40:33,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 3537 transitions. [2021-03-10 21:40:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:40:33,024 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:33,024 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:33,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91294 [2021-03-10 21:40:33,224 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash -525397259, now seen corresponding path program 231 times [2021-03-10 21:40:33,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:33,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115608897] [2021-03-10 21:40:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:33,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115608897] [2021-03-10 21:40:33,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815698552] [2021-03-10 21:40:33,367 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 [2021-03-10 21:40:33,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:40:33,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:33,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:40:33,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:33,682 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 2665 DAG size of output: 49 [2021-03-10 21:40:34,044 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:34,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:34,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:36,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:36,950 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:40:36,951 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:40:36,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:40:42,310 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1250 DAG size of output: 840 [2021-03-10 21:40:43,426 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 977 [2021-03-10 21:40:43,583 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 977 [2021-03-10 21:40:43,745 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1648 DAG size of output: 894 [2021-03-10 21:40:43,864 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 896 DAG size of output: 881 [2021-03-10 21:40:44,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:45,408 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:40:45,409 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:40:45,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:40:46,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:46,965 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:40:46,966 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:40:46,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:40:47,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:47,631 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:40:47,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:40:47,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:40:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:47,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:47,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:40:47,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142360648] [2021-03-10 21:40:47,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:40:47,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:47,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:40:47,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:40:47,665 INFO L87 Difference]: Start difference. First operand 1091 states and 3537 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:40:48,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:48,600 INFO L93 Difference]: Finished difference Result 1242 states and 3880 transitions. [2021-03-10 21:40:48,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:40:48,601 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:40:48,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:48,602 INFO L225 Difference]: With dead ends: 1242 [2021-03-10 21:40:48,602 INFO L226 Difference]: Without dead ends: 1232 [2021-03-10 21:40:48,602 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 925.8ms TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:40:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-03-10 21:40:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1091. [2021-03-10 21:40:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 3.244954128440367) internal successors, (3537), 1090 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 3537 transitions. [2021-03-10 21:40:48,615 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 3537 transitions. Word has length 20 [2021-03-10 21:40:48,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:48,615 INFO L480 AbstractCegarLoop]: Abstraction has 1091 states and 3537 transitions. [2021-03-10 21:40:48,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:40:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 3537 transitions. [2021-03-10 21:40:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:40:48,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:48,616 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:48,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93035 [2021-03-10 21:40:48,817 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1577786183, now seen corresponding path program 232 times [2021-03-10 21:40:48,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:48,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235516573] [2021-03-10 21:40:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:48,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235516573] [2021-03-10 21:40:48,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352502689] [2021-03-10 21:40:48,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:40:48,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:40:48,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:48,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:40:48,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:49,407 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:49,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:49,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:50,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:50,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:50,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:40:50,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:40:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:50,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:50,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:40:50,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695613556] [2021-03-10 21:40:50,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:40:50,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:50,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:40:50,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:40:50,780 INFO L87 Difference]: Start difference. First operand 1091 states and 3537 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:40:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:51,202 INFO L93 Difference]: Finished difference Result 1298 states and 4152 transitions. [2021-03-10 21:40:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:40:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:40:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:51,205 INFO L225 Difference]: With dead ends: 1298 [2021-03-10 21:40:51,205 INFO L226 Difference]: Without dead ends: 1282 [2021-03-10 21:40:51,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:40:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-03-10 21:40:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1246. [2021-03-10 21:40:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.2497991967871487) internal successors, (4046), 1245 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4046 transitions. [2021-03-10 21:40:51,220 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4046 transitions. Word has length 20 [2021-03-10 21:40:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:51,220 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4046 transitions. [2021-03-10 21:40:51,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:40:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4046 transitions. [2021-03-10 21:40:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:40:51,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:51,222 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:51,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96346,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:51,422 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:51,422 INFO L82 PathProgramCache]: Analyzing trace with hash -718911653, now seen corresponding path program 233 times [2021-03-10 21:40:51,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:51,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624641356] [2021-03-10 21:40:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:51,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624641356] [2021-03-10 21:40:51,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926606961] [2021-03-10 21:40:51,563 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 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 [2021-03-10 21:40:51,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:40:51,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:51,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:40:51,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:52,083 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:40:52,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:52,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:40:53,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:53,850 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:40:53,850 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:40:53,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:40:56,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:40:57,379 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:40:57,379 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:40:57,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:40:59,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:00,148 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:00,149 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:00,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:01,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:01,144 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:41:01,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:01,145 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:41:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:01,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:01,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:41:01,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913861350] [2021-03-10 21:41:01,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:41:01,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:01,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:41:01,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:41:01,193 INFO L87 Difference]: Start difference. First operand 1246 states and 4046 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:41:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:02,713 INFO L93 Difference]: Finished difference Result 1420 states and 4449 transitions. [2021-03-10 21:41:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:41:02,714 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:41:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:02,716 INFO L225 Difference]: With dead ends: 1420 [2021-03-10 21:41:02,716 INFO L226 Difference]: Without dead ends: 1396 [2021-03-10 21:41:02,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1002.9ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:41:02,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-03-10 21:41:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1250. [2021-03-10 21:41:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.2514011208967175) internal successors, (4061), 1249 states have internal predecessors, (4061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4061 transitions. [2021-03-10 21:41:02,733 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4061 transitions. Word has length 20 [2021-03-10 21:41:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:02,733 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 4061 transitions. [2021-03-10 21:41:02,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:41:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4061 transitions. [2021-03-10 21:41:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:41:02,735 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:02,735 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:02,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96823 [2021-03-10 21:41:02,939 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:02,939 INFO L82 PathProgramCache]: Analyzing trace with hash 991701655, now seen corresponding path program 234 times [2021-03-10 21:41:02,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:02,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326536282] [2021-03-10 21:41:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:41:03,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326536282] [2021-03-10 21:41:03,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880773629] [2021-03-10 21:41:03,100 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 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 [2021-03-10 21:41:03,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:41:03,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:03,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:41:03,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:03,632 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:03,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:03,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:04,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:04,922 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:41:04,923 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:41:04,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:41:08,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:09,145 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:41:09,145 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:41:09,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:41:11,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:12,189 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:12,189 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:12,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:14,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:14,732 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:41:14,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:14,732 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:41:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:14,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:14,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:41:14,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125104083] [2021-03-10 21:41:14,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:41:14,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:14,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:41:14,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:41:14,765 INFO L87 Difference]: Start difference. First operand 1250 states and 4061 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:41:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:15,580 INFO L93 Difference]: Finished difference Result 1412 states and 4448 transitions. [2021-03-10 21:41:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:41:15,581 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:41:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:15,583 INFO L225 Difference]: With dead ends: 1412 [2021-03-10 21:41:15,583 INFO L226 Difference]: Without dead ends: 1402 [2021-03-10 21:41:15,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:41:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-03-10 21:41:15,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1278. [2021-03-10 21:41:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.2537196554424432) internal successors, (4155), 1277 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4155 transitions. [2021-03-10 21:41:15,598 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4155 transitions. Word has length 20 [2021-03-10 21:41:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:15,598 INFO L480 AbstractCegarLoop]: Abstraction has 1278 states and 4155 transitions. [2021-03-10 21:41:15,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:41:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4155 transitions. [2021-03-10 21:41:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:41:15,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:15,600 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:15,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98724,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:15,800 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:15,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1813860645, now seen corresponding path program 235 times [2021-03-10 21:41:15,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:15,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117120950] [2021-03-10 21:41:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:15,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117120950] [2021-03-10 21:41:15,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067011634] [2021-03-10 21:41:15,948 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 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 [2021-03-10 21:41:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:15,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:41:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:16,451 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:16,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:16,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:16,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:17,489 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:41:17,490 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:41:17,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:41:21,199 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1456 DAG size of output: 891 [2021-03-10 21:41:22,518 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 1954 DAG size of output: 1250 [2021-03-10 21:41:22,709 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1954 DAG size of output: 1250 [2021-03-10 21:41:22,908 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1960 DAG size of output: 1255 [2021-03-10 21:41:23,109 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1257 DAG size of output: 1103 [2021-03-10 21:41:24,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:25,336 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:41:25,337 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:41:25,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:41:28,427 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 928 DAG size of output: 805 [2021-03-10 21:41:28,596 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1359 DAG size of output: 1107 [2021-03-10 21:41:28,766 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1359 DAG size of output: 1107 [2021-03-10 21:41:28,958 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1364 DAG size of output: 980 [2021-03-10 21:41:29,092 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 952 [2021-03-10 21:41:30,557 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 647 [2021-03-10 21:41:31,851 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1313 DAG size of output: 708 [2021-03-10 21:41:31,962 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1318 DAG size of output: 689 [2021-03-10 21:41:32,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:32,709 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:32,710 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:32,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:35,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:35,960 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:41:35,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:35,961 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:41:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:35,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:36,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:41:36,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606394459] [2021-03-10 21:41:36,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:41:36,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:41:36,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:41:36,000 INFO L87 Difference]: Start difference. First operand 1278 states and 4155 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:41:37,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:37,021 INFO L93 Difference]: Finished difference Result 1498 states and 4645 transitions. [2021-03-10 21:41:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:41:37,022 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:41:37,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:37,024 INFO L225 Difference]: With dead ends: 1498 [2021-03-10 21:41:37,024 INFO L226 Difference]: Without dead ends: 1481 [2021-03-10 21:41:37,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 906.5ms TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:41:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-03-10 21:41:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1280. [2021-03-10 21:41:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.251759186864738) internal successors, (4159), 1279 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:37,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4159 transitions. [2021-03-10 21:41:37,037 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4159 transitions. Word has length 20 [2021-03-10 21:41:37,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:37,037 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4159 transitions. [2021-03-10 21:41:37,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:41:37,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4159 transitions. [2021-03-10 21:41:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:41:37,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:37,038 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:37,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101116 [2021-03-10 21:41:37,239 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1408021271, now seen corresponding path program 236 times [2021-03-10 21:41:37,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:37,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282905736] [2021-03-10 21:41:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:37,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282905736] [2021-03-10 21:41:37,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828271163] [2021-03-10 21:41:37,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:41:37,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:41:37,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:37,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:41:37,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:37,923 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:37,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:37,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:38,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:38,840 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:41:38,841 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:41:38,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:41:40,616 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 1068 [2021-03-10 21:41:40,733 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 798 [2021-03-10 21:41:42,107 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1356 DAG size of output: 754 [2021-03-10 21:41:42,232 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1775 DAG size of output: 1071 [2021-03-10 21:41:42,360 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1775 DAG size of output: 1071 [2021-03-10 21:41:42,485 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1779 DAG size of output: 943 [2021-03-10 21:41:43,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:44,345 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:41:44,345 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:41:44,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:41:45,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:46,283 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:41:46,283 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:41:46,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:41:47,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:47,326 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:41:47,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:41:47,327 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:41:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:47,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:41:47,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:41:47,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196355827] [2021-03-10 21:41:47,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:41:47,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:41:47,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:41:47,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:41:47,369 INFO L87 Difference]: Start difference. First operand 1280 states and 4159 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:41:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:41:48,331 INFO L93 Difference]: Finished difference Result 1400 states and 4433 transitions. [2021-03-10 21:41:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:41:48,332 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:41:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:41:48,334 INFO L225 Difference]: With dead ends: 1400 [2021-03-10 21:41:48,334 INFO L226 Difference]: Without dead ends: 1395 [2021-03-10 21:41:48,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 829.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:41:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-03-10 21:41:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1280. [2021-03-10 21:41:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.251759186864738) internal successors, (4159), 1279 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:41:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4159 transitions. [2021-03-10 21:41:48,349 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4159 transitions. Word has length 20 [2021-03-10 21:41:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:41:48,349 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4159 transitions. [2021-03-10 21:41:48,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:41:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4159 transitions. [2021-03-10 21:41:48,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:41:48,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:41:48,351 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:41:48,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104852,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:41:48,551 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:41:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:41:48,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1792854437, now seen corresponding path program 237 times [2021-03-10 21:41:48,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:41:48,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003673357] [2021-03-10 21:41:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:41:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:41:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:41:48,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003673357] [2021-03-10 21:41:48,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236621648] [2021-03-10 21:41:48,707 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 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 [2021-03-10 21:41:48,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:41:48,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:41:48,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:41:48,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:41:50,105 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 8262 DAG size of output: 53 [2021-03-10 21:41:50,407 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:41:50,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:41:50,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:41:51,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:41:51,840 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:41:51,840 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:41:51,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:41:56,126 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 876 DAG size of output: 618 [2021-03-10 21:41:56,242 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 732 [2021-03-10 21:41:56,379 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1107 DAG size of output: 821 [2021-03-10 21:41:56,567 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1469 DAG size of output: 1069 [2021-03-10 21:41:56,759 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 1469 DAG size of output: 1069 [2021-03-10 21:41:56,976 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 1474 DAG size of output: 1070 [2021-03-10 21:41:57,166 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 1107 [2021-03-10 21:41:59,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:41:59,470 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:41:59,471 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:41:59,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:42:03,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:03,481 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:03,482 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:03,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:42:05,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:05,145 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:42:05,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:05,145 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:42:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:05,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:05,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:42:05,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786211851] [2021-03-10 21:42:05,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:42:05,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:05,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:42:05,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:42:05,186 INFO L87 Difference]: Start difference. First operand 1280 states and 4159 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:42:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:06,145 INFO L93 Difference]: Finished difference Result 1426 states and 4499 transitions. [2021-03-10 21:42:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:42:06,146 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:42:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:06,148 INFO L225 Difference]: With dead ends: 1426 [2021-03-10 21:42:06,148 INFO L226 Difference]: Without dead ends: 1421 [2021-03-10 21:42:06,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 965.7ms TimeCoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:42:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-03-10 21:42:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1280. [2021-03-10 21:42:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.251759186864738) internal successors, (4159), 1279 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4159 transitions. [2021-03-10 21:42:06,164 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4159 transitions. Word has length 20 [2021-03-10 21:42:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:06,164 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4159 transitions. [2021-03-10 21:42:06,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:42:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4159 transitions. [2021-03-10 21:42:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:42:06,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:06,166 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:06,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106557,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:06,367 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:06,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2059213719, now seen corresponding path program 238 times [2021-03-10 21:42:06,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:06,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297384872] [2021-03-10 21:42:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:06,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297384872] [2021-03-10 21:42:06,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952588033] [2021-03-10 21:42:06,507 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 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 [2021-03-10 21:42:06,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:42:06,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:06,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:42:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:07,046 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:07,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:07,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:07,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:08,288 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:42:08,289 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:42:08,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:42:11,547 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1687 DAG size of output: 1082 [2021-03-10 21:42:11,675 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1687 DAG size of output: 1082 [2021-03-10 21:42:11,817 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1695 DAG size of output: 1081 [2021-03-10 21:42:14,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:14,999 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:42:14,999 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:42:15,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:42:17,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:18,327 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:18,328 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:18,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:42:19,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:19,145 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:42:19,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:19,146 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:42:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:19,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:19,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:42:19,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830525161] [2021-03-10 21:42:19,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:42:19,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:19,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:42:19,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:42:19,188 INFO L87 Difference]: Start difference. First operand 1280 states and 4159 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:42:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:20,197 INFO L93 Difference]: Finished difference Result 1422 states and 4493 transitions. [2021-03-10 21:42:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:42:20,198 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:42:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:20,200 INFO L225 Difference]: With dead ends: 1422 [2021-03-10 21:42:20,200 INFO L226 Difference]: Without dead ends: 1417 [2021-03-10 21:42:20,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 945.6ms TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:42:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-03-10 21:42:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1280. [2021-03-10 21:42:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.251759186864738) internal successors, (4159), 1279 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4159 transitions. [2021-03-10 21:42:20,216 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4159 transitions. Word has length 20 [2021-03-10 21:42:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:20,217 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4159 transitions. [2021-03-10 21:42:20,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:42:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4159 transitions. [2021-03-10 21:42:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:42:20,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:20,218 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:20,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108970 [2021-03-10 21:42:20,421 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:20,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:20,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1304818541, now seen corresponding path program 239 times [2021-03-10 21:42:20,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:20,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053969397] [2021-03-10 21:42:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:42:20,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053969397] [2021-03-10 21:42:20,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542755746] [2021-03-10 21:42:20,544 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 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 [2021-03-10 21:42:20,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:42:20,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:20,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:42:20,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:21,036 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:21,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:21,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:21,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:21,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:21,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:42:21,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:42:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:21,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:21,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-03-10 21:42:21,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292558691] [2021-03-10 21:42:21,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:42:21,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:21,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:42:21,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:42:21,466 INFO L87 Difference]: Start difference. First operand 1280 states and 4159 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:22,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:22,003 INFO L93 Difference]: Finished difference Result 1319 states and 4221 transitions. [2021-03-10 21:42:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:42:22,005 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:42:22,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:22,007 INFO L225 Difference]: With dead ends: 1319 [2021-03-10 21:42:22,007 INFO L226 Difference]: Without dead ends: 1301 [2021-03-10 21:42:22,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:42:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-03-10 21:42:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1280. [2021-03-10 21:42:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.250195465207193) internal successors, (4157), 1279 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4157 transitions. [2021-03-10 21:42:22,024 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4157 transitions. Word has length 20 [2021-03-10 21:42:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:22,024 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4157 transitions. [2021-03-10 21:42:22,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4157 transitions. [2021-03-10 21:42:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:42:22,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:22,026 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:22,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111317,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:22,227 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:22,227 INFO L82 PathProgramCache]: Analyzing trace with hash -323078483, now seen corresponding path program 240 times [2021-03-10 21:42:22,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:22,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669532833] [2021-03-10 21:42:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:22,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669532833] [2021-03-10 21:42:22,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561618915] [2021-03-10 21:42:22,356 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 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 [2021-03-10 21:42:22,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:42:22,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:42:22,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:42:22,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:22,902 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:22,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:22,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:23,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:24,308 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:42:24,308 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:42:24,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:42:26,925 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1136 DAG size of output: 1021 [2021-03-10 21:42:27,067 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1156 DAG size of output: 1041 [2021-03-10 21:42:27,230 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1156 DAG size of output: 1041 [2021-03-10 21:42:27,389 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1162 DAG size of output: 1046 [2021-03-10 21:42:27,521 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1048 DAG size of output: 982 [2021-03-10 21:42:29,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:29,481 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:42:29,482 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:42:29,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:42:31,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:31,409 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:31,409 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:31,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:42:32,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:32,562 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:42:32,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:32,563 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:42:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:32,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:32,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:42:32,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645017017] [2021-03-10 21:42:32,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:42:32,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:32,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:42:32,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:42:32,601 INFO L87 Difference]: Start difference. First operand 1280 states and 4157 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:42:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:42:33,762 INFO L93 Difference]: Finished difference Result 1464 states and 4577 transitions. [2021-03-10 21:42:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:42:33,763 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:42:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:42:33,765 INFO L225 Difference]: With dead ends: 1464 [2021-03-10 21:42:33,765 INFO L226 Difference]: Without dead ends: 1454 [2021-03-10 21:42:33,765 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 992.3ms TimeCoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:42:33,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-03-10 21:42:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1283. [2021-03-10 21:42:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.2503900156006242) internal successors, (4167), 1282 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:42:33,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4167 transitions. [2021-03-10 21:42:33,781 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4167 transitions. Word has length 20 [2021-03-10 21:42:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:42:33,781 INFO L480 AbstractCegarLoop]: Abstraction has 1283 states and 4167 transitions. [2021-03-10 21:42:33,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:42:33,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4167 transitions. [2021-03-10 21:42:33,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:42:33,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:42:33,783 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:42:33,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111497,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:42:33,983 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:42:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:42:33,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1160056455, now seen corresponding path program 241 times [2021-03-10 21:42:33,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:42:33,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144996909] [2021-03-10 21:42:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:42:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:34,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144996909] [2021-03-10 21:42:34,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843044261] [2021-03-10 21:42:34,135 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 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 [2021-03-10 21:42:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:42:34,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:42:34,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:42:34,669 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:42:34,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:42:34,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:42:36,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:42:36,915 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:42:36,915 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:42:36,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:42:39,947 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 1070 [2021-03-10 21:42:40,103 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 1121 [2021-03-10 21:42:40,239 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 1121 [2021-03-10 21:42:40,388 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1315 DAG size of output: 1127 [2021-03-10 21:42:40,616 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 1129 DAG size of output: 1583 [2021-03-10 21:42:41,158 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 1230 [2021-03-10 21:42:44,111 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1487 DAG size of output: 740 [2021-03-10 21:42:44,245 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1676 DAG size of output: 852 [2021-03-10 21:42:44,448 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1047 DAG size of output: 1423 [2021-03-10 21:42:44,557 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1035 DAG size of output: 1026 [2021-03-10 21:42:47,113 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 2897 DAG size of output: 1424 [2021-03-10 21:42:47,387 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 2897 DAG size of output: 1424 [2021-03-10 21:42:47,609 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 2900 DAG size of output: 1067 [2021-03-10 21:42:50,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:50,994 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:42:50,994 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:42:50,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:42:55,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:55,431 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:42:55,432 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:42:55,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:42:59,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:42:59,080 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:42:59,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:42:59,082 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:42:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:42:59,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:42:59,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:42:59,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125736310] [2021-03-10 21:42:59,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:42:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:42:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:42:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:42:59,121 INFO L87 Difference]: Start difference. First operand 1283 states and 4167 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:43:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:00,277 INFO L93 Difference]: Finished difference Result 1576 states and 4870 transitions. [2021-03-10 21:43:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:43:00,278 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:43:00,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:00,280 INFO L225 Difference]: With dead ends: 1576 [2021-03-10 21:43:00,280 INFO L226 Difference]: Without dead ends: 1547 [2021-03-10 21:43:00,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1088.2ms TimeCoverageRelationStatistics Valid=303, Invalid=2147, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:43:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-03-10 21:43:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1268. [2021-03-10 21:43:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 3.2478295185477504) internal successors, (4115), 1267 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 4115 transitions. [2021-03-10 21:43:00,297 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 4115 transitions. Word has length 20 [2021-03-10 21:43:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:00,297 INFO L480 AbstractCegarLoop]: Abstraction has 1268 states and 4115 transitions. [2021-03-10 21:43:00,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:43:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 4115 transitions. [2021-03-10 21:43:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:43:00,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:00,299 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:00,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113393,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:00,500 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2040819253, now seen corresponding path program 242 times [2021-03-10 21:43:00,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:00,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672270728] [2021-03-10 21:43:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:00,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672270728] [2021-03-10 21:43:00,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014294962] [2021-03-10 21:43:00,658 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 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 [2021-03-10 21:43:00,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:00,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:00,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:43:00,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:01,238 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:43:01,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:01,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:43:01,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:02,480 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:43:02,481 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:43:02,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:43:05,102 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1287 DAG size of output: 837 [2021-03-10 21:43:05,213 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 1017 [2021-03-10 21:43:07,075 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1246 DAG size of output: 972 [2021-03-10 21:43:07,185 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1252 DAG size of output: 976 [2021-03-10 21:43:07,314 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 978 DAG size of output: 1169 [2021-03-10 21:43:08,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:09,186 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:43:09,187 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:43:09,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:43:10,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:10,718 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:43:10,719 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:43:10,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:43:11,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:11,333 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:43:11,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:11,333 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:43:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:11,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:11,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:43:11,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090078825] [2021-03-10 21:43:11,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:43:11,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:11,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:43:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:43:11,365 INFO L87 Difference]: Start difference. First operand 1268 states and 4115 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:43:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:12,147 INFO L93 Difference]: Finished difference Result 1447 states and 4528 transitions. [2021-03-10 21:43:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:43:12,147 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:43:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:12,149 INFO L225 Difference]: With dead ends: 1447 [2021-03-10 21:43:12,149 INFO L226 Difference]: Without dead ends: 1437 [2021-03-10 21:43:12,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 890.4ms TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:43:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-03-10 21:43:12,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1270. [2021-03-10 21:43:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.2474389282899923) internal successors, (4121), 1269 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4121 transitions. [2021-03-10 21:43:12,161 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4121 transitions. Word has length 20 [2021-03-10 21:43:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:12,161 INFO L480 AbstractCegarLoop]: Abstraction has 1270 states and 4121 transitions. [2021-03-10 21:43:12,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:43:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4121 transitions. [2021-03-10 21:43:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:43:12,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:12,162 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:12,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119043,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:12,363 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:12,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:12,363 INFO L82 PathProgramCache]: Analyzing trace with hash -107400723, now seen corresponding path program 243 times [2021-03-10 21:43:12,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:12,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661100067] [2021-03-10 21:43:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:12,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661100067] [2021-03-10 21:43:12,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009604488] [2021-03-10 21:43:12,480 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 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 [2021-03-10 21:43:12,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:43:12,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:12,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:43:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:12,952 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:43:12,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:12,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:43:13,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:14,073 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:43:14,074 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:43:14,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:43:17,500 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 989 DAG size of output: 630 [2021-03-10 21:43:17,641 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 766 [2021-03-10 21:43:19,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:19,444 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:43:19,445 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:43:19,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:43:21,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:21,541 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:43:21,542 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:43:21,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:43:22,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:22,040 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:43:22,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:22,041 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:43:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:22,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:22,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:43:22,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603514449] [2021-03-10 21:43:22,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:43:22,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:43:22,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:43:22,075 INFO L87 Difference]: Start difference. First operand 1270 states and 4121 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:43:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:23,186 INFO L93 Difference]: Finished difference Result 1547 states and 4754 transitions. [2021-03-10 21:43:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:43:23,186 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:43:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:23,188 INFO L225 Difference]: With dead ends: 1547 [2021-03-10 21:43:23,188 INFO L226 Difference]: Without dead ends: 1525 [2021-03-10 21:43:23,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 968.9ms TimeCoverageRelationStatistics Valid=334, Invalid=2636, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:43:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-03-10 21:43:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1272. [2021-03-10 21:43:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.2439024390243905) internal successors, (4123), 1271 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4123 transitions. [2021-03-10 21:43:23,202 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4123 transitions. Word has length 20 [2021-03-10 21:43:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:23,202 INFO L480 AbstractCegarLoop]: Abstraction has 1272 states and 4123 transitions. [2021-03-10 21:43:23,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:43:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4123 transitions. [2021-03-10 21:43:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:43:23,203 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:23,203 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:23,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120914 [2021-03-10 21:43:23,404 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:23,405 INFO L82 PathProgramCache]: Analyzing trace with hash 986690865, now seen corresponding path program 244 times [2021-03-10 21:43:23,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:23,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998206203] [2021-03-10 21:43:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:23,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998206203] [2021-03-10 21:43:23,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824188987] [2021-03-10 21:43:23,520 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:23,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:23,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:23,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:43:23,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:24,000 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:43:24,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:24,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:43:25,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:25,885 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:43:25,885 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:43:25,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:43:27,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:28,319 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:43:28,319 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:43:28,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:43:29,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:29,479 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:43:29,480 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:43:29,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:43:29,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:29,898 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:43:29,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:29,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:43:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:29,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:29,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:43:29,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546835147] [2021-03-10 21:43:29,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:43:29,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:43:29,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:43:29,931 INFO L87 Difference]: Start difference. First operand 1272 states and 4123 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:43:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:30,759 INFO L93 Difference]: Finished difference Result 1416 states and 4454 transitions. [2021-03-10 21:43:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:43:30,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:43:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:30,761 INFO L225 Difference]: With dead ends: 1416 [2021-03-10 21:43:30,761 INFO L226 Difference]: Without dead ends: 1411 [2021-03-10 21:43:30,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 809.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:43:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-03-10 21:43:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1272. [2021-03-10 21:43:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.2439024390243905) internal successors, (4123), 1271 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4123 transitions. [2021-03-10 21:43:30,775 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4123 transitions. Word has length 20 [2021-03-10 21:43:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:30,775 INFO L480 AbstractCegarLoop]: Abstraction has 1272 states and 4123 transitions. [2021-03-10 21:43:30,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:43:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4123 transitions. [2021-03-10 21:43:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:43:30,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:30,776 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:30,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123011,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:30,977 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:30,977 INFO L82 PathProgramCache]: Analyzing trace with hash 543791725, now seen corresponding path program 245 times [2021-03-10 21:43:30,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:30,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499943497] [2021-03-10 21:43:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:31,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499943497] [2021-03-10 21:43:31,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988250110] [2021-03-10 21:43:31,107 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:31,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:43:31,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:31,126 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:43:31,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:31,569 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:43:31,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:31,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:43:31,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:32,477 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:43:32,478 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:43:32,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:43:35,840 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1102 DAG size of output: 644 [2021-03-10 21:43:36,049 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1165 DAG size of output: 685 [2021-03-10 21:43:38,128 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 2109 DAG size of output: 985 [2021-03-10 21:43:38,365 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 2124 DAG size of output: 999 [2021-03-10 21:43:38,617 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 2399 DAG size of output: 1247 [2021-03-10 21:43:38,870 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 2399 DAG size of output: 1247 [2021-03-10 21:43:39,145 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 2404 DAG size of output: 1233 [2021-03-10 21:43:39,373 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 1235 DAG size of output: 1086 [2021-03-10 21:43:39,514 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 947 DAG size of output: 935 [2021-03-10 21:43:39,673 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 924 DAG size of output: 1004 [2021-03-10 21:43:39,794 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 915 [2021-03-10 21:43:39,913 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 904 [2021-03-10 21:43:42,055 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 985 DAG size of output: 719 [2021-03-10 21:43:42,165 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 985 DAG size of output: 719 [2021-03-10 21:43:42,304 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 679 [2021-03-10 21:43:42,531 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 845 [2021-03-10 21:43:44,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:44,939 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:43:44,939 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:43:44,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:43:47,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:47,504 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:43:47,505 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:43:47,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:43:48,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:43:48,248 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:43:48,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:43:48,249 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:43:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:48,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:48,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:43:48,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647126134] [2021-03-10 21:43:48,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:43:48,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:48,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:43:48,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:43:48,284 INFO L87 Difference]: Start difference. First operand 1272 states and 4123 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:43:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:49,193 INFO L93 Difference]: Finished difference Result 1406 states and 4439 transitions. [2021-03-10 21:43:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:43:49,193 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:43:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:49,195 INFO L225 Difference]: With dead ends: 1406 [2021-03-10 21:43:49,195 INFO L226 Difference]: Without dead ends: 1401 [2021-03-10 21:43:49,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 872.9ms TimeCoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:43:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-03-10 21:43:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1272. [2021-03-10 21:43:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.2439024390243905) internal successors, (4123), 1271 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4123 transitions. [2021-03-10 21:43:49,208 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4123 transitions. Word has length 20 [2021-03-10 21:43:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:49,208 INFO L480 AbstractCegarLoop]: Abstraction has 1272 states and 4123 transitions. [2021-03-10 21:43:49,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-03-10 21:43:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4123 transitions. [2021-03-10 21:43:49,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:43:49,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:49,209 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:49,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124530 [2021-03-10 21:43:49,410 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:49,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:49,410 INFO L82 PathProgramCache]: Analyzing trace with hash 565292265, now seen corresponding path program 246 times [2021-03-10 21:43:49,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:49,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826693980] [2021-03-10 21:43:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:49,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826693980] [2021-03-10 21:43:49,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188963962] [2021-03-10 21:43:49,522 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:49,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:43:49,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:49,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:43:49,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:49,942 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:43:49,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:49,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:43:50,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:50,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:50,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:43:50,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:43:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:50,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:50,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:43:50,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729626838] [2021-03-10 21:43:50,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:43:50,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:43:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:43:50,486 INFO L87 Difference]: Start difference. First operand 1272 states and 4123 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:43:51,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:51,028 INFO L93 Difference]: Finished difference Result 1464 states and 4684 transitions. [2021-03-10 21:43:51,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:43:51,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:43:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:51,030 INFO L225 Difference]: With dead ends: 1464 [2021-03-10 21:43:51,030 INFO L226 Difference]: Without dead ends: 1448 [2021-03-10 21:43:51,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 378.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:43:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-03-10 21:43:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1417. [2021-03-10 21:43:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 3.246468926553672) internal successors, (4597), 1416 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 4597 transitions. [2021-03-10 21:43:51,044 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 4597 transitions. Word has length 20 [2021-03-10 21:43:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:51,044 INFO L480 AbstractCegarLoop]: Abstraction has 1417 states and 4597 transitions. [2021-03-10 21:43:51,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:43:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 4597 transitions. [2021-03-10 21:43:51,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:43:51,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:51,046 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:51,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127716,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:51,246 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:51,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1424166795, now seen corresponding path program 247 times [2021-03-10 21:43:51,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:51,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010246575] [2021-03-10 21:43:51,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:51,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010246575] [2021-03-10 21:43:51,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094611131] [2021-03-10 21:43:51,362 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:51,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:43:51,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:51,778 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:43:51,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:43:51,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:43:52,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:43:52,854 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:43:52,855 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:43:52,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:43:55,760 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 698 [2021-03-10 21:43:55,889 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 698 [2021-03-10 21:43:56,063 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 1179 DAG size of output: 623 [2021-03-10 21:43:56,192 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 625 DAG size of output: 791 [2021-03-10 21:43:57,798 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1016 DAG size of output: 798 [2021-03-10 21:43:59,590 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1176 DAG size of output: 822 [2021-03-10 21:43:59,814 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 2009 DAG size of output: 1455 [2021-03-10 21:44:00,212 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 2107 DAG size of output: 1547 [2021-03-10 21:44:03,143 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1253 DAG size of output: 884 [2021-03-10 21:44:03,319 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 1664 DAG size of output: 1209 [2021-03-10 21:44:03,808 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 1776 DAG size of output: 1324 [2021-03-10 21:44:04,290 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 3476 DAG size of output: 2570 [2021-03-10 21:44:04,796 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 3476 DAG size of output: 2570 [2021-03-10 21:44:05,230 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 3481 DAG size of output: 2066 [2021-03-10 21:44:05,504 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 2066 DAG size of output: 1808 [2021-03-10 21:44:05,663 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1098 DAG size of output: 1094 [2021-03-10 21:44:05,770 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 989 [2021-03-10 21:44:07,019 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1822 DAG size of output: 1199 [2021-03-10 21:44:07,172 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1822 DAG size of output: 1199 [2021-03-10 21:44:07,337 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 1825 DAG size of output: 1138 [2021-03-10 21:44:07,461 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1140 DAG size of output: 867 [2021-03-10 21:44:07,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:44:08,331 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:44:08,331 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:44:08,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:44:09,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:44:10,073 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:44:10,073 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:44:10,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:44:11,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:44:11,225 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:44:11,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:11,226 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:44:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:11,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:11,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:44:11,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445501395] [2021-03-10 21:44:11,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:44:11,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:11,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:44:11,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:44:11,258 INFO L87 Difference]: Start difference. First operand 1417 states and 4597 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:44:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:12,332 INFO L93 Difference]: Finished difference Result 1563 states and 4937 transitions. [2021-03-10 21:44:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:44:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:44:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:12,335 INFO L225 Difference]: With dead ends: 1563 [2021-03-10 21:44:12,335 INFO L226 Difference]: Without dead ends: 1553 [2021-03-10 21:44:12,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 768.0ms TimeCoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:44:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-03-10 21:44:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1421. [2021-03-10 21:44:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.2485915492957744) internal successors, (4613), 1420 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4613 transitions. [2021-03-10 21:44:12,351 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4613 transitions. Word has length 20 [2021-03-10 21:44:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:12,351 INFO L480 AbstractCegarLoop]: Abstraction has 1421 states and 4613 transitions. [2021-03-10 21:44:12,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:44:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4613 transitions. [2021-03-10 21:44:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:44:12,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:12,352 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:12,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127971,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:12,553 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1160187193, now seen corresponding path program 248 times [2021-03-10 21:44:12,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:12,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548917763] [2021-03-10 21:44:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:12,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548917763] [2021-03-10 21:44:12,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126963154] [2021-03-10 21:44:12,666 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:12,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:12,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:12,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:44:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:13,087 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:44:13,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:13,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:44:14,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:14,665 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:44:14,665 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:44:14,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:44:18,746 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1345 DAG size of output: 1054 [2021-03-10 21:44:18,882 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1446 DAG size of output: 1102 [2021-03-10 21:44:19,036 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1626 DAG size of output: 1194 [2021-03-10 21:44:19,192 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1626 DAG size of output: 1194 [2021-03-10 21:44:19,367 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1633 DAG size of output: 1085 [2021-03-10 21:44:19,543 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 1087 DAG size of output: 1001 [2021-03-10 21:44:19,758 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 927 DAG size of output: 853 [2021-03-10 21:44:19,880 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 824 DAG size of output: 782 [2021-03-10 21:44:22,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:44:22,516 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:44:22,517 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:44:22,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:44:23,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:44:24,031 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:44:24,031 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:44:24,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:44:26,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:44:26,209 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:44:26,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:26,210 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:44:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:26,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:26,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:44:26,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801476090] [2021-03-10 21:44:26,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:44:26,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:44:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:44:26,243 INFO L87 Difference]: Start difference. First operand 1421 states and 4613 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:44:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:27,195 INFO L93 Difference]: Finished difference Result 1609 states and 5093 transitions. [2021-03-10 21:44:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:44:27,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:44:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:27,198 INFO L225 Difference]: With dead ends: 1609 [2021-03-10 21:44:27,198 INFO L226 Difference]: Without dead ends: 1599 [2021-03-10 21:44:27,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 660.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:44:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-03-10 21:44:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1473. [2021-03-10 21:44:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 3.249320652173913) internal successors, (4783), 1472 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 4783 transitions. [2021-03-10 21:44:27,212 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 4783 transitions. Word has length 20 [2021-03-10 21:44:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:27,212 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 4783 transitions. [2021-03-10 21:44:27,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:44:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 4783 transitions. [2021-03-10 21:44:27,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:44:27,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:27,213 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:27,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131919,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:27,414 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash 329217803, now seen corresponding path program 249 times [2021-03-10 21:44:27,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:27,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623238371] [2021-03-10 21:44:27,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:44:27,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623238371] [2021-03-10 21:44:27,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250129729] [2021-03-10 21:44:27,529 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:27,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:44:27,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:27,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:44:27,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:27,981 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:44:27,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:27,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:44:29,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:29,583 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:44:29,583 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:44:29,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:44:31,217 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 719 [2021-03-10 21:44:34,568 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1087 [2021-03-10 21:44:34,723 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1087 [2021-03-10 21:44:34,894 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1527 DAG size of output: 1017 [2021-03-10 21:44:35,040 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1019 DAG size of output: 1055 [2021-03-10 21:44:38,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:44:38,635 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:44:38,636 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:44:38,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-03-10 21:44:42,130 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 2105 DAG size of output: 1321 [2021-03-10 21:44:44,156 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 978 [2021-03-10 21:44:44,357 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 3412 DAG size of output: 1801 [2021-03-10 21:44:44,585 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 3535 DAG size of output: 1823 [2021-03-10 21:44:44,860 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 4076 DAG size of output: 2136 [2021-03-10 21:44:45,154 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 4076 DAG size of output: 2136 [2021-03-10 21:44:45,453 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 4081 DAG size of output: 1808 [2021-03-10 21:44:45,689 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 1810 DAG size of output: 1709 [2021-03-10 21:44:45,842 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1194 DAG size of output: 1279 [2021-03-10 21:44:46,940 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1481 DAG size of output: 1053 [2021-03-10 21:44:48,162 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 2140 DAG size of output: 1243 [2021-03-10 21:44:48,333 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 2140 DAG size of output: 1243 [2021-03-10 21:44:48,483 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 2143 DAG size of output: 859 [2021-03-10 21:44:49,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 21:44:49,855 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-03-10 21:44:49,856 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-03-10 21:44:49,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-03-10 21:44:50,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 21:44:50,891 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-03-10 21:44:50,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:44:50,892 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-03-10 21:44:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:50,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:50,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 21:44:50,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705432166] [2021-03-10 21:44:50,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:44:50,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:50,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:44:50,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:44:50,927 INFO L87 Difference]: Start difference. First operand 1473 states and 4783 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:44:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:51,802 INFO L93 Difference]: Finished difference Result 1674 states and 5244 transitions. [2021-03-10 21:44:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:44:51,802 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:44:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:51,804 INFO L225 Difference]: With dead ends: 1674 [2021-03-10 21:44:51,804 INFO L226 Difference]: Without dead ends: 1664 [2021-03-10 21:44:51,804 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=210, Invalid=1770, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:44:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-03-10 21:44:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1488. [2021-03-10 21:44:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.2508406186953596) internal successors, (4834), 1487 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 4834 transitions. [2021-03-10 21:44:51,819 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 4834 transitions. Word has length 20 [2021-03-10 21:44:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:51,819 INFO L480 AbstractCegarLoop]: Abstraction has 1488 states and 4834 transitions. [2021-03-10 21:44:51,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-03-10 21:44:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 4834 transitions. [2021-03-10 21:44:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:44:51,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:51,820 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:52,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134964 [2021-03-10 21:44:52,021 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:52,021 INFO L82 PathProgramCache]: Analyzing trace with hash -743867577, now seen corresponding path program 250 times [2021-03-10 21:44:52,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:52,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005138689] [2021-03-10 21:44:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:52,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005138689] [2021-03-10 21:44:52,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314251181] [2021-03-10 21:44:52,154 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:52,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:52,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:52,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:44:52,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:52,657 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:44:52,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:52,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:44:53,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:53,574 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-03-10 21:44:53,574 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-03-10 21:44:53,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-03-10 21:44:57,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:44:58,165 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-03-10 21:44:58,166 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-03-10 21:44:58,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 Received shutdown request... [2021-03-10 21:44:59,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139736 [2021-03-10 21:44:59,196 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 21:44:59,199 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 21:44:59,199 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 09:44:59 BasicIcfg [2021-03-10 21:44:59,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 21:44:59,199 INFO L168 Benchmark]: Toolchain (without parser) took 860534.79 ms. Allocated memory was 371.2 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 351.1 MB in the beginning and 1.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. [2021-03-10 21:44:59,199 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 371.2 MB. Free memory is still 352.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:44:59,199 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.54 ms. Allocated memory is still 371.2 MB. Free memory was 350.7 MB in the beginning and 349.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:44:59,200 INFO L168 Benchmark]: Boogie Preprocessor took 14.44 ms. Allocated memory is still 371.2 MB. Free memory was 349.2 MB in the beginning and 348.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:44:59,200 INFO L168 Benchmark]: RCFGBuilder took 303.24 ms. Allocated memory is still 371.2 MB. Free memory was 348.1 MB in the beginning and 354.1 MB in the end (delta: -5.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.0 GB. [2021-03-10 21:44:59,200 INFO L168 Benchmark]: TraceAbstraction took 860184.40 ms. Allocated memory was 371.2 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 354.1 MB in the beginning and 1.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. [2021-03-10 21:44:59,200 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 0.09 ms. Allocated memory is still 371.2 MB. Free memory is still 352.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.54 ms. Allocated memory is still 371.2 MB. Free memory was 350.7 MB in the beginning and 349.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.44 ms. Allocated memory is still 371.2 MB. Free memory was 349.2 MB in the beginning and 348.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 303.24 ms. Allocated memory is still 371.2 MB. Free memory was 348.1 MB in the beginning and 354.1 MB in the end (delta: -5.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 860184.40 ms. Allocated memory was 371.2 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 354.1 MB in the beginning and 1.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 65). Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 860122.7ms, OverallIterations: 267, TraceHistogramMax: 8, EmptinessCheckTime: 152.5ms, AutomataDifference: 76548.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5353 SDtfs, 11955 SDslu, 43242 SDs, 0 SdLazy, 85574 SolverSat, 8637 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31698.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9089 GetRequests, 3254 SyntacticMatches, 93 SemanticMatches, 5742 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32970 ImplicationChecksByTransitivity, 67589.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1488occurred in iteration=266, InterpolantAutomatonStates: 4920, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1488.2ms AutomataMinimizationTime, 266 MinimizatonAttempts, 26746 StatesRemovedByMinimization, 262 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 578.7ms SsaConstructionTime, 2249.2ms SatisfiabilityAnalysisTime, 714940.0ms InterpolantComputationTime, 9251 NumberOfCodeBlocks, 9251 NumberOfCodeBlocksAsserted, 1025 NumberOfCheckSat, 8723 ConstructedInterpolants, 1 QuantifiedInterpolants, 88047 SizeOfPredicates, 400 NumberOfNonLiveVariables, 18037 ConjunctsInSsa, 6065 ConjunctsInUnsatCore, 528 InterpolantComputations, 4 PerfectInterpolantSequences, 2028/13251 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