/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:24:05,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:24:05,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:24:05,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 19:24:05,310 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 [2021-02-19 19:24:05,343 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:24:05,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:24:05,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:24:05,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:24:05,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:24:05,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:24:05,347 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:24:05,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:24:05,348 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:24:05,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:24:05,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:24:05,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:24:05,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:24:05,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:24:05,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:24:05,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:24:05,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:24:05,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:24:05,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:24:05,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:24:05,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:24:05,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:24:05,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:24:05,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:24:05,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:24:05,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:24:05,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:24:05,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:24:05,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:24:05,351 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:24:05,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:24:05,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:24:05,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:24:05,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:24:05,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:24:05,697 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:24:05,698 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:24:05,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl [2021-02-19 19:24:05,699 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl' [2021-02-19 19:24:05,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:24:05,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:24:05,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:24:05,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:24:05,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:24:05,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (1/1) ... [2021-02-19 19:24:05,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (1/1) ... [2021-02-19 19:24:05,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:24:05,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:24:05,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:24:05,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:24:05,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (1/1) ... [2021-02-19 19:24:05,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (1/1) ... [2021-02-19 19:24:05,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (1/1) ... [2021-02-19 19:24:05,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (1/1) ... [2021-02-19 19:24:05,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (1/1) ... [2021-02-19 19:24:05,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (1/1) ... [2021-02-19 19:24:05,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (1/1) ... [2021-02-19 19:24:05,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:24:05,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:24:05,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:24:05,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:24:05,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (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 [2021-02-19 19:24:05,826 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:24:05,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:24:05,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:24:05,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:24:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:24:05,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:24:05,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:24:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:24:05,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:24:05,838 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 19:24:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 19:24:05,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 19:24:05,838 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 19:24:05,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:24:05,970 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:24:05,972 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:24:05 BoogieIcfgContainer [2021-02-19 19:24:05,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:24:05,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:24:05,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:24:05,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:24:05,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:24:05" (1/2) ... [2021-02-19 19:24:05,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42675b3e and model type sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:24:05, skipping insertion in model container [2021-02-19 19:24:05,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:24:05" (2/2) ... [2021-02-19 19:24:05,976 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array-hom.wvr.bpl [2021-02-19 19:24:05,979 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:24:05,979 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:24:05,981 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:24:05,990 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:24:06,037 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 19:24:06,061 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 19:24:06,076 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:24:06,076 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:24:06,076 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:24:06,076 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:24:06,076 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:24:06,076 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:24:06,076 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:24:06,076 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:24:06,082 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-02-19 19:24:06,094 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 19:24:06,101 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:06,102 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:06,102 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:06,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-02-19 19:24:06,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:06,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97736442] [2021-02-19 19:24:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:06,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97736442] [2021-02-19 19:24:06,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:24:06,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:24:06,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426028695] [2021-02-19 19:24:06,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:24:06,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:06,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:24:06,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:24:06,256 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 3.6) internal successors, (18), 4 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) [2021-02-19 19:24:06,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:06,324 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-02-19 19:24:06,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:24:06,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 19:24:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:06,338 INFO L225 Difference]: With dead ends: 154 [2021-02-19 19:24:06,338 INFO L226 Difference]: Without dead ends: 154 [2021-02-19 19:24:06,339 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 19:24:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-19 19:24:06,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-02-19 19:24:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-02-19 19:24:06,401 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-02-19 19:24:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:06,402 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-02-19 19:24:06,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-02-19 19:24:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-02-19 19:24:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 19:24:06,405 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:06,405 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:06,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:24:06,405 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-02-19 19:24:06,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:06,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371785693] [2021-02-19 19:24:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:06,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371785693] [2021-02-19 19:24:06,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:24:06,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:24:06,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065999379] [2021-02-19 19:24:06,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:24:06,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:06,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:24:06,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 19:24:06,483 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-02-19 19:24:06,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:06,525 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-02-19 19:24:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:24:06,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 20 [2021-02-19 19:24:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:06,528 INFO L225 Difference]: With dead ends: 158 [2021-02-19 19:24:06,529 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 19:24:06,530 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:24:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 19:24:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-02-19 19:24:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-02-19 19:24:06,553 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-02-19 19:24:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:06,553 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-02-19 19:24:06,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-02-19 19:24:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-02-19 19:24:06,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:24:06,558 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:06,558 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:06,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 19:24:06,558 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:06,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:06,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-02-19 19:24:06,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:06,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241638488] [2021-02-19 19:24:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:06,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241638488] [2021-02-19 19:24:06,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126815084] [2021-02-19 19:24:06,927 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 [2021-02-19 19:24:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:06,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 19:24:06,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:07,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:07,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 19:24:07,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:07,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:07,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:07,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-02-19 19:24:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:07,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:07,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:07,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057074776] [2021-02-19 19:24:07,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:07,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:07,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:07,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:07,286 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:07,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:07,484 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-02-19 19:24:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:24:07,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 19:24:07,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:07,491 INFO L225 Difference]: With dead ends: 330 [2021-02-19 19:24:07,491 INFO L226 Difference]: Without dead ends: 315 [2021-02-19 19:24:07,492 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-02-19 19:24:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-02-19 19:24:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-02-19 19:24:07,500 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-02-19 19:24:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:07,501 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-02-19 19:24:07,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-02-19 19:24:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:24:07,501 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:07,502 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:07,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 19:24:07,718 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:07,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-02-19 19:24:07,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:07,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610243352] [2021-02-19 19:24:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:07,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610243352] [2021-02-19 19:24:07,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315265739] [2021-02-19 19:24:07,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:07,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:07,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:07,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 19:24:07,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:08,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:08,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-02-19 19:24:08,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:24:08,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:08,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:08,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-02-19 19:24:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:08,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:08,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-02-19 19:24:08,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325707014] [2021-02-19 19:24:08,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:08,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:08,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:08,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:08,209 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-02-19 19:24:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:08,544 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-02-19 19:24:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:24:08,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-02-19 19:24:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:08,548 INFO L225 Difference]: With dead ends: 374 [2021-02-19 19:24:08,548 INFO L226 Difference]: Without dead ends: 359 [2021-02-19 19:24:08,548 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-02-19 19:24:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-02-19 19:24:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 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) [2021-02-19 19:24:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-02-19 19:24:08,560 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-02-19 19:24:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:08,560 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-02-19 19:24:08,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-02-19 19:24:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-02-19 19:24:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:24:08,561 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:08,561 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:08,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:08,774 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:08,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:08,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-02-19 19:24:08,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:08,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317303702] [2021-02-19 19:24:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:08,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317303702] [2021-02-19 19:24:08,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554221512] [2021-02-19 19:24:08,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:24:08,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:24:08,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:08,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 19:24:08,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:09,047 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 [2021-02-19 19:24:09,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:09,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:09,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:09,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-02-19 19:24:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:09,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:09,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 19:24:09,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521030326] [2021-02-19 19:24:09,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:09,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:09,083 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-02-19 19:24:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:09,216 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-02-19 19:24:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:24:09,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 22 [2021-02-19 19:24:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:09,218 INFO L225 Difference]: With dead ends: 296 [2021-02-19 19:24:09,218 INFO L226 Difference]: Without dead ends: 281 [2021-02-19 19:24:09,218 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:24:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-02-19 19:24:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-02-19 19:24:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-02-19 19:24:09,224 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-02-19 19:24:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:09,224 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-02-19 19:24:09,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-02-19 19:24:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-02-19 19:24:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:24:09,225 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:09,225 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:09,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:09,442 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:09,443 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-02-19 19:24:09,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:09,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813877860] [2021-02-19 19:24:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:09,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813877860] [2021-02-19 19:24:09,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709751740] [2021-02-19 19:24:09,609 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 [2021-02-19 19:24:09,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:09,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:09,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 19:24:09,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:09,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:09,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-02-19 19:24:09,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:24:09,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:09,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:09,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-02-19 19:24:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:09,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:09,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:09,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648698996] [2021-02-19 19:24:09,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:09,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:09,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:09,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:09,803 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-02-19 19:24:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:09,998 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-02-19 19:24:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:24:09,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 22 [2021-02-19 19:24:10,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:10,007 INFO L225 Difference]: With dead ends: 425 [2021-02-19 19:24:10,007 INFO L226 Difference]: Without dead ends: 410 [2021-02-19 19:24:10,007 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:10,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-02-19 19:24:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-02-19 19:24:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-02-19 19:24:10,018 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-02-19 19:24:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:10,018 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-02-19 19:24:10,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-02-19 19:24:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-02-19 19:24:10,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:10,019 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:10,019 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:10,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:10,230 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:10,230 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-02-19 19:24:10,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:10,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17581680] [2021-02-19 19:24:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:10,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17581680] [2021-02-19 19:24:10,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872004903] [2021-02-19 19:24:10,278 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 [2021-02-19 19:24:10,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:10,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:10,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:10,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:10,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:10,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:10,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634191125] [2021-02-19 19:24:10,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:10,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:10,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:10,366 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:10,696 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-02-19 19:24:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:24:10,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:10,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:10,703 INFO L225 Difference]: With dead ends: 619 [2021-02-19 19:24:10,703 INFO L226 Difference]: Without dead ends: 619 [2021-02-19 19:24:10,703 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:24:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-02-19 19:24:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-02-19 19:24:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-02-19 19:24:10,710 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-02-19 19:24:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:10,710 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-02-19 19:24:10,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-02-19 19:24:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:10,711 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:10,711 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:10,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 19:24:10,926 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:10,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-02-19 19:24:10,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:10,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847236641] [2021-02-19 19:24:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:10,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847236641] [2021-02-19 19:24:10,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955853826] [2021-02-19 19:24:10,992 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 [2021-02-19 19:24:11,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:11,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:11,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:11,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:11,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:11,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:11,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426739576] [2021-02-19 19:24:11,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:11,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:11,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:11,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:11,127 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:11,840 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-02-19 19:24:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:24:11,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:11,846 INFO L225 Difference]: With dead ends: 1078 [2021-02-19 19:24:11,847 INFO L226 Difference]: Without dead ends: 1078 [2021-02-19 19:24:11,847 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:24:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-02-19 19:24:11,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-02-19 19:24:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-02-19 19:24:11,860 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-02-19 19:24:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:11,861 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-02-19 19:24:11,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-02-19 19:24:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:11,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:11,863 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:12,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:12,082 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:12,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:12,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-02-19 19:24:12,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:12,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821239861] [2021-02-19 19:24:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:12,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821239861] [2021-02-19 19:24:12,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450370996] [2021-02-19 19:24:12,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:12,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:12,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:12,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:12,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828812865] [2021-02-19 19:24:12,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:12,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:12,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:12,245 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:12,854 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-02-19 19:24:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:24:12,857 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:12,861 INFO L225 Difference]: With dead ends: 951 [2021-02-19 19:24:12,861 INFO L226 Difference]: Without dead ends: 951 [2021-02-19 19:24:12,862 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:24:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-02-19 19:24:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-02-19 19:24:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-02-19 19:24:12,874 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-02-19 19:24:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:12,874 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-02-19 19:24:12,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-02-19 19:24:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:12,875 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:12,875 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:13,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:13,084 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:13,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:13,084 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-02-19 19:24:13,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:13,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463143630] [2021-02-19 19:24:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:13,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463143630] [2021-02-19 19:24:13,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013007781] [2021-02-19 19:24:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 19:24:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:13,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:24:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:13,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:13,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 19:24:13,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243383911] [2021-02-19 19:24:13,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:24:13,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:13,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:24:13,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:24:13,206 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-02-19 19:24:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:13,293 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-02-19 19:24:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:24:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-02-19 19:24:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:13,297 INFO L225 Difference]: With dead ends: 669 [2021-02-19 19:24:13,297 INFO L226 Difference]: Without dead ends: 663 [2021-02-19 19:24:13,298 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-02-19 19:24:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-02-19 19:24:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-02-19 19:24:13,310 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-02-19 19:24:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:13,311 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-02-19 19:24:13,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-02-19 19:24:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-02-19 19:24:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:13,312 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:13,312 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:13,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 19:24:13,532 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-02-19 19:24:13,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:13,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659193791] [2021-02-19 19:24:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:13,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659193791] [2021-02-19 19:24:13,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568957017] [2021-02-19 19:24:13,582 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:13,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:13,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:13,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:13,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:13,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:13,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:24:13,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566137377] [2021-02-19 19:24:13,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:13,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:13,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:13,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:13,670 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:13,814 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-02-19 19:24:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:24:13,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:13,817 INFO L225 Difference]: With dead ends: 710 [2021-02-19 19:24:13,817 INFO L226 Difference]: Without dead ends: 672 [2021-02-19 19:24:13,818 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:24:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-02-19 19:24:13,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-02-19 19:24:13,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-02-19 19:24:13,832 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-02-19 19:24:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:13,832 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-02-19 19:24:13,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-02-19 19:24:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:13,834 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:13,834 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:14,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 19:24:14,054 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:14,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-02-19 19:24:14,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:14,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524329855] [2021-02-19 19:24:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:14,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524329855] [2021-02-19 19:24:14,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18322402] [2021-02-19 19:24:14,098 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:14,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:14,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:14,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:24:14,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:14,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:14,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 19:24:14,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696607336] [2021-02-19 19:24:14,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:24:14,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:14,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:24:14,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:24:14,172 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-02-19 19:24:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:14,275 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-02-19 19:24:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:24:14,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-02-19 19:24:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:14,278 INFO L225 Difference]: With dead ends: 830 [2021-02-19 19:24:14,279 INFO L226 Difference]: Without dead ends: 830 [2021-02-19 19:24:14,279 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-02-19 19:24:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-02-19 19:24:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-02-19 19:24:14,291 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-02-19 19:24:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:14,291 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-02-19 19:24:14,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-02-19 19:24:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-02-19 19:24:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:14,292 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:14,292 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:14,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 19:24:14,506 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:14,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-02-19 19:24:14,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:14,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808358896] [2021-02-19 19:24:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808358896] [2021-02-19 19:24:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792469662] [2021-02-19 19:24:14,549 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 [2021-02-19 19:24:14,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:14,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:14,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:14,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:14,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81978473] [2021-02-19 19:24:14,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:14,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:14,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:14,632 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:24:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:14,908 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-02-19 19:24:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:24:14,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-02-19 19:24:14,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:14,913 INFO L225 Difference]: With dead ends: 1196 [2021-02-19 19:24:14,913 INFO L226 Difference]: Without dead ends: 1196 [2021-02-19 19:24:14,913 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:24:14,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-02-19 19:24:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-02-19 19:24:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-02-19 19:24:14,934 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-02-19 19:24:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:14,934 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-02-19 19:24:14,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:24:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-02-19 19:24:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:14,935 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:14,935 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:15,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 19:24:15,150 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-02-19 19:24:15,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:15,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855121656] [2021-02-19 19:24:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:15,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855121656] [2021-02-19 19:24:15,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887531109] [2021-02-19 19:24:15,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:15,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:15,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:15,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:15,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:15,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:15,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:15,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025565389] [2021-02-19 19:24:15,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:15,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:15,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:15,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:15,284 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:24:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:15,672 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-02-19 19:24:15,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:24:15,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-02-19 19:24:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:15,678 INFO L225 Difference]: With dead ends: 1492 [2021-02-19 19:24:15,678 INFO L226 Difference]: Without dead ends: 1492 [2021-02-19 19:24:15,679 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:24:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-02-19 19:24:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-02-19 19:24:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 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) [2021-02-19 19:24:15,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-02-19 19:24:15,699 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-02-19 19:24:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:15,699 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-02-19 19:24:15,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:24:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-02-19 19:24:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:15,700 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:15,700 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:15,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 19:24:15,901 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:15,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-02-19 19:24:15,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:15,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900544131] [2021-02-19 19:24:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:15,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900544131] [2021-02-19 19:24:15,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132655512] [2021-02-19 19:24:15,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:15,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:15,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:15,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:15,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:16,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:16,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:24:16,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703475007] [2021-02-19 19:24:16,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:16,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:16,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:16,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:16,053 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:16,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:16,298 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-02-19 19:24:16,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:24:16,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:16,308 INFO L225 Difference]: With dead ends: 1258 [2021-02-19 19:24:16,308 INFO L226 Difference]: Without dead ends: 1248 [2021-02-19 19:24:16,309 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:24:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-02-19 19:24:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-02-19 19:24:16,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-02-19 19:24:16,338 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-02-19 19:24:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:16,338 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-02-19 19:24:16,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-02-19 19:24:16,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:16,341 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:16,341 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:16,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:16,552 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:16,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:16,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-02-19 19:24:16,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:16,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955327376] [2021-02-19 19:24:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:16,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955327376] [2021-02-19 19:24:16,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294106933] [2021-02-19 19:24:16,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:16,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:16,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:16,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:16,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:16,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:16,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:24:16,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595832076] [2021-02-19 19:24:16,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:16,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:16,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:16,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:16,687 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:16,929 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-02-19 19:24:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:24:16,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:16,934 INFO L225 Difference]: With dead ends: 1329 [2021-02-19 19:24:16,934 INFO L226 Difference]: Without dead ends: 1329 [2021-02-19 19:24:16,935 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:24:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-02-19 19:24:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-02-19 19:24:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-02-19 19:24:16,954 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-02-19 19:24:16,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:16,954 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-02-19 19:24:16,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:16,954 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-02-19 19:24:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:16,956 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:16,956 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:17,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:17,170 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-02-19 19:24:17,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:17,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331456009] [2021-02-19 19:24:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:17,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331456009] [2021-02-19 19:24:17,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615851055] [2021-02-19 19:24:17,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:17,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:17,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:17,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:17,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:17,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104006859] [2021-02-19 19:24:17,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:17,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:17,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:17,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:17,273 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:24:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:17,580 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-02-19 19:24:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:24:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-02-19 19:24:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:17,586 INFO L225 Difference]: With dead ends: 1548 [2021-02-19 19:24:17,586 INFO L226 Difference]: Without dead ends: 1544 [2021-02-19 19:24:17,586 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:24:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-02-19 19:24:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-02-19 19:24:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-02-19 19:24:17,607 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-02-19 19:24:17,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:17,607 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-02-19 19:24:17,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-02-19 19:24:17,607 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-02-19 19:24:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:17,608 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:17,608 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:17,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 19:24:17,826 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-02-19 19:24:17,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:17,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401354030] [2021-02-19 19:24:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:17,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401354030] [2021-02-19 19:24:17,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817638251] [2021-02-19 19:24:17,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:17,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:17,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:17,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:17,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:17,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958715111] [2021-02-19 19:24:17,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:17,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:17,970 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:18,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:18,593 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-02-19 19:24:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 19:24:18,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:18,603 INFO L225 Difference]: With dead ends: 2734 [2021-02-19 19:24:18,603 INFO L226 Difference]: Without dead ends: 2734 [2021-02-19 19:24:18,603 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:24:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-02-19 19:24:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-02-19 19:24:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-02-19 19:24:18,639 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-02-19 19:24:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:18,639 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-02-19 19:24:18,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-02-19 19:24:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:18,641 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:18,641 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:18,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:18,854 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:18,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-02-19 19:24:18,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:18,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476549108] [2021-02-19 19:24:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:18,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476549108] [2021-02-19 19:24:18,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331285211] [2021-02-19 19:24:18,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:18,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:18,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:18,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:18,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:18,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:18,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432825010] [2021-02-19 19:24:18,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:18,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:18,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:18,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:18,998 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:19,639 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-02-19 19:24:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 19:24:19,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:19,646 INFO L225 Difference]: With dead ends: 2693 [2021-02-19 19:24:19,646 INFO L226 Difference]: Without dead ends: 2693 [2021-02-19 19:24:19,647 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:24:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-02-19 19:24:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-02-19 19:24:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-02-19 19:24:19,678 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-02-19 19:24:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:19,678 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-02-19 19:24:19,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-02-19 19:24:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:19,680 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:19,680 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:19,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 19:24:19,896 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:19,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-02-19 19:24:19,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:19,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047191431] [2021-02-19 19:24:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:19,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047191431] [2021-02-19 19:24:19,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17415047] [2021-02-19 19:24:19,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:19,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:19,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:19,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:20,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:20,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:20,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917741990] [2021-02-19 19:24:20,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:20,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:20,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:20,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:20,035 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:24:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:20,573 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-02-19 19:24:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:24:20,574 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:20,580 INFO L225 Difference]: With dead ends: 2677 [2021-02-19 19:24:20,580 INFO L226 Difference]: Without dead ends: 2677 [2021-02-19 19:24:20,581 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:24:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-02-19 19:24:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-02-19 19:24:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-02-19 19:24:20,612 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-02-19 19:24:20,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:20,612 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-02-19 19:24:20,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:24:20,612 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-02-19 19:24:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:20,614 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:20,614 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:20,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 19:24:20,826 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:20,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:20,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-02-19 19:24:20,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:20,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900013503] [2021-02-19 19:24:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:20,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900013503] [2021-02-19 19:24:20,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494811867] [2021-02-19 19:24:20,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:20,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:24:20,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:20,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:20,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:20,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:20,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:20,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849756735] [2021-02-19 19:24:20,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:20,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:20,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:20,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:20,956 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:24:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:21,475 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-02-19 19:24:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:24:21,476 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:21,481 INFO L225 Difference]: With dead ends: 2474 [2021-02-19 19:24:21,481 INFO L226 Difference]: Without dead ends: 2470 [2021-02-19 19:24:21,482 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:24:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-02-19 19:24:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-02-19 19:24:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-02-19 19:24:21,511 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-02-19 19:24:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:21,511 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-02-19 19:24:21,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:24:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-02-19 19:24:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:21,513 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:21,513 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:21,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 19:24:21,729 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-02-19 19:24:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:21,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608907819] [2021-02-19 19:24:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:21,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608907819] [2021-02-19 19:24:21,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426936291] [2021-02-19 19:24:21,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:21,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:24:21,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:21,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:21,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:21,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:21,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:21,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475142238] [2021-02-19 19:24:21,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:21,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:21,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:21,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:21,873 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:22,434 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-02-19 19:24:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:24:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-02-19 19:24:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:22,439 INFO L225 Difference]: With dead ends: 2514 [2021-02-19 19:24:22,439 INFO L226 Difference]: Without dead ends: 2514 [2021-02-19 19:24:22,440 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:24:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-02-19 19:24:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-02-19 19:24:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-02-19 19:24:22,460 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-02-19 19:24:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:22,460 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-02-19 19:24:22,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-02-19 19:24:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:22,462 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:22,462 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:22,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 19:24:22,678 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:22,678 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-02-19 19:24:22,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:22,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155442191] [2021-02-19 19:24:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:22,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155442191] [2021-02-19 19:24:22,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469836405] [2021-02-19 19:24:22,705 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 [2021-02-19 19:24:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:22,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:22,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:22,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:22,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:22,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733953437] [2021-02-19 19:24:22,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:22,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:22,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:22,788 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:23,354 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-02-19 19:24:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:24:23,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-02-19 19:24:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:23,359 INFO L225 Difference]: With dead ends: 2332 [2021-02-19 19:24:23,359 INFO L226 Difference]: Without dead ends: 2328 [2021-02-19 19:24:23,359 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:24:23,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-02-19 19:24:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-02-19 19:24:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-02-19 19:24:23,399 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-02-19 19:24:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:23,399 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-02-19 19:24:23,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-02-19 19:24:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:23,401 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:23,401 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:23,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 19:24:23,602 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-02-19 19:24:23,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:23,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178224471] [2021-02-19 19:24:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:23,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178224471] [2021-02-19 19:24:23,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683828355] [2021-02-19 19:24:23,627 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 [2021-02-19 19:24:23,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:24:23,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:23,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:24:23,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:23,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:23,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 19:24:23,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049462836] [2021-02-19 19:24:23,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:24:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:23,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:24:23,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:24:23,696 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-02-19 19:24:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:23,774 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-02-19 19:24:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:24:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-02-19 19:24:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:23,776 INFO L225 Difference]: With dead ends: 929 [2021-02-19 19:24:23,777 INFO L226 Difference]: Without dead ends: 929 [2021-02-19 19:24:23,777 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-02-19 19:24:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-02-19 19:24:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 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) [2021-02-19 19:24:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-02-19 19:24:23,800 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-02-19 19:24:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:23,802 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-02-19 19:24:23,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-02-19 19:24:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-02-19 19:24:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:23,803 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:23,803 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:24,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:24,018 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:24,018 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-02-19 19:24:24,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:24,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702047929] [2021-02-19 19:24:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:24,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702047929] [2021-02-19 19:24:24,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153303344] [2021-02-19 19:24:24,059 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:24,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:24,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:24,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:24,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:24,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 19:24:24,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249910932] [2021-02-19 19:24:24,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:24:24,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:24,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:24:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:24:24,129 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-02-19 19:24:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:24,401 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-02-19 19:24:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:24:24,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-02-19 19:24:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:24,404 INFO L225 Difference]: With dead ends: 1555 [2021-02-19 19:24:24,404 INFO L226 Difference]: Without dead ends: 1555 [2021-02-19 19:24:24,404 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:24:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-02-19 19:24:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-02-19 19:24:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-02-19 19:24:24,429 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-02-19 19:24:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:24,429 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-02-19 19:24:24,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-02-19 19:24:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-02-19 19:24:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:24,432 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:24,432 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:24,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 19:24:24,648 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-02-19 19:24:24,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:24,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531205749] [2021-02-19 19:24:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531205749] [2021-02-19 19:24:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103429672] [2021-02-19 19:24:24,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:24,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:24,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:24,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:24,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:24,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:24,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 19:24:24,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536377284] [2021-02-19 19:24:24,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:24:24,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:24,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:24:24,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:24:24,745 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-02-19 19:24:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:24,987 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-02-19 19:24:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:24:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-02-19 19:24:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:24,991 INFO L225 Difference]: With dead ends: 1605 [2021-02-19 19:24:24,991 INFO L226 Difference]: Without dead ends: 1605 [2021-02-19 19:24:24,991 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:24:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-02-19 19:24:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-02-19 19:24:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-02-19 19:24:25,010 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-02-19 19:24:25,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:25,010 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-02-19 19:24:25,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-02-19 19:24:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-02-19 19:24:25,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:25,011 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:25,012 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:25,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:25,226 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:25,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:25,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-02-19 19:24:25,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:25,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423239391] [2021-02-19 19:24:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:25,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423239391] [2021-02-19 19:24:25,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129160279] [2021-02-19 19:24:25,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:25,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:25,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:25,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:25,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:25,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:25,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 19:24:25,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194735406] [2021-02-19 19:24:25,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:24:25,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:25,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:24:25,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:24:25,320 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-02-19 19:24:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:25,514 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-02-19 19:24:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:24:25,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-02-19 19:24:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:25,518 INFO L225 Difference]: With dead ends: 1524 [2021-02-19 19:24:25,518 INFO L226 Difference]: Without dead ends: 1520 [2021-02-19 19:24:25,518 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:25,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-02-19 19:24:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-02-19 19:24:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-02-19 19:24:25,536 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-02-19 19:24:25,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:25,537 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-02-19 19:24:25,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-02-19 19:24:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-02-19 19:24:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:25,538 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:25,538 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:25,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 19:24:25,750 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:25,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-02-19 19:24:25,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:25,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249319954] [2021-02-19 19:24:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:25,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249319954] [2021-02-19 19:24:25,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118517096] [2021-02-19 19:24:25,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:25,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:25,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:25,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:25,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:25,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:25,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 19:24:25,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600876843] [2021-02-19 19:24:25,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:24:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:24:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:24:25,917 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-02-19 19:24:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:26,125 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-02-19 19:24:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:24:26,126 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-02-19 19:24:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:26,128 INFO L225 Difference]: With dead ends: 1508 [2021-02-19 19:24:26,128 INFO L226 Difference]: Without dead ends: 1496 [2021-02-19 19:24:26,128 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:24:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-02-19 19:24:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-02-19 19:24:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-02-19 19:24:26,146 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-02-19 19:24:26,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:26,146 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-02-19 19:24:26,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-02-19 19:24:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-02-19 19:24:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:26,147 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:26,147 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:26,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:26,362 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:26,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-02-19 19:24:26,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:26,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835534496] [2021-02-19 19:24:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:26,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835534496] [2021-02-19 19:24:26,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832972687] [2021-02-19 19:24:26,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:26,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:26,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:26,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:26,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:26,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:26,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:26,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096573893] [2021-02-19 19:24:26,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:26,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:26,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:26,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:26,510 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:26,959 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-02-19 19:24:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:24:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:26,964 INFO L225 Difference]: With dead ends: 2412 [2021-02-19 19:24:26,964 INFO L226 Difference]: Without dead ends: 2412 [2021-02-19 19:24:26,964 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:24:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-02-19 19:24:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-02-19 19:24:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-02-19 19:24:26,990 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-02-19 19:24:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:26,990 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-02-19 19:24:26,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-02-19 19:24:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:26,992 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:26,992 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:27,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 19:24:27,206 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:27,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-02-19 19:24:27,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:27,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785212408] [2021-02-19 19:24:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:27,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785212408] [2021-02-19 19:24:27,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745442288] [2021-02-19 19:24:27,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:27,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:27,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:27,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:27,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738245458] [2021-02-19 19:24:27,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:27,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:27,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:27,336 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:27,756 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-02-19 19:24:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:24:27,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:27,759 INFO L225 Difference]: With dead ends: 2335 [2021-02-19 19:24:27,759 INFO L226 Difference]: Without dead ends: 2335 [2021-02-19 19:24:27,760 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:24:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-02-19 19:24:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-02-19 19:24:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-02-19 19:24:27,777 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-02-19 19:24:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:27,778 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-02-19 19:24:27,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-02-19 19:24:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:27,779 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:27,779 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:27,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:27,987 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-02-19 19:24:27,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:27,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139443464] [2021-02-19 19:24:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:28,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139443464] [2021-02-19 19:24:28,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911070309] [2021-02-19 19:24:28,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:28,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:28,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:28,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:28,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:28,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:28,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:28,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743532129] [2021-02-19 19:24:28,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:28,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:28,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:28,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:28,087 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:24:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:28,456 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-02-19 19:24:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:24:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:28,460 INFO L225 Difference]: With dead ends: 2285 [2021-02-19 19:24:28,461 INFO L226 Difference]: Without dead ends: 2285 [2021-02-19 19:24:28,461 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:24:28,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-02-19 19:24:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-02-19 19:24:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-02-19 19:24:28,485 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-02-19 19:24:28,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:28,485 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-02-19 19:24:28,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:24:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-02-19 19:24:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:28,487 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:28,487 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:28,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 19:24:28,702 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:28,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:28,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-02-19 19:24:28,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:28,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049085471] [2021-02-19 19:24:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:28,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049085471] [2021-02-19 19:24:28,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289120816] [2021-02-19 19:24:28,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:28,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:28,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:28,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:28,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:28,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:28,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:28,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939865561] [2021-02-19 19:24:28,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:28,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:28,818 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:24:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:29,149 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-02-19 19:24:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:24:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:29,153 INFO L225 Difference]: With dead ends: 2176 [2021-02-19 19:24:29,153 INFO L226 Difference]: Without dead ends: 2172 [2021-02-19 19:24:29,153 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:24:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-02-19 19:24:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-02-19 19:24:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-02-19 19:24:29,176 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-02-19 19:24:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:29,176 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-02-19 19:24:29,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:24:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-02-19 19:24:29,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:29,178 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:29,178 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:29,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:29,394 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:29,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-02-19 19:24:29,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:29,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208227391] [2021-02-19 19:24:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:29,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208227391] [2021-02-19 19:24:29,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154429849] [2021-02-19 19:24:29,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:29,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:29,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:29,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:29,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:29,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:29,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298426776] [2021-02-19 19:24:29,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:29,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:29,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:29,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:29,523 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:29,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:29,867 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-02-19 19:24:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:24:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-02-19 19:24:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:29,871 INFO L225 Difference]: With dead ends: 2199 [2021-02-19 19:24:29,871 INFO L226 Difference]: Without dead ends: 2199 [2021-02-19 19:24:29,872 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:24:29,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-02-19 19:24:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-02-19 19:24:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-02-19 19:24:29,894 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-02-19 19:24:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:29,895 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-02-19 19:24:29,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-02-19 19:24:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:29,896 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:29,896 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:30,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 19:24:30,111 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:30,111 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-02-19 19:24:30,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:30,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482927065] [2021-02-19 19:24:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:30,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482927065] [2021-02-19 19:24:30,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984976056] [2021-02-19 19:24:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:30,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:30,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:30,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:30,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:30,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:30,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622462677] [2021-02-19 19:24:30,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:30,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:30,246 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:30,573 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-02-19 19:24:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:24:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-02-19 19:24:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:30,578 INFO L225 Difference]: With dead ends: 2156 [2021-02-19 19:24:30,578 INFO L226 Difference]: Without dead ends: 2152 [2021-02-19 19:24:30,578 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:24:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-02-19 19:24:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-02-19 19:24:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-02-19 19:24:30,602 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-02-19 19:24:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:30,602 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-02-19 19:24:30,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-02-19 19:24:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:30,604 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:30,604 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:30,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 19:24:30,818 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:30,818 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-02-19 19:24:30,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:30,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19749224] [2021-02-19 19:24:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:30,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19749224] [2021-02-19 19:24:30,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728833368] [2021-02-19 19:24:30,853 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 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 [2021-02-19 19:24:30,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:30,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:30,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:30,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:30,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:30,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253257688] [2021-02-19 19:24:30,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:30,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:30,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:30,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:30,948 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:24:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:31,266 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-02-19 19:24:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:24:31,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:31,270 INFO L225 Difference]: With dead ends: 2097 [2021-02-19 19:24:31,270 INFO L226 Difference]: Without dead ends: 2097 [2021-02-19 19:24:31,270 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:24:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-02-19 19:24:31,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-02-19 19:24:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-02-19 19:24:31,293 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-02-19 19:24:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:31,293 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-02-19 19:24:31,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:24:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-02-19 19:24:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:31,295 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:31,295 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:31,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 19:24:31,496 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:31,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-02-19 19:24:31,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:31,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024141553] [2021-02-19 19:24:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:31,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024141553] [2021-02-19 19:24:31,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655375903] [2021-02-19 19:24:31,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:31,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:31,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:31,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:31,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650599314] [2021-02-19 19:24:31,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:31,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:31,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:31,611 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:24:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:31,868 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-02-19 19:24:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:24:31,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:31,871 INFO L225 Difference]: With dead ends: 1963 [2021-02-19 19:24:31,872 INFO L226 Difference]: Without dead ends: 1959 [2021-02-19 19:24:31,872 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:24:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-02-19 19:24:31,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-02-19 19:24:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 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) [2021-02-19 19:24:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-02-19 19:24:31,893 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-02-19 19:24:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:31,893 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-02-19 19:24:31,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:24:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-02-19 19:24:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:31,895 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:31,895 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:32,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 19:24:32,102 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:32,102 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-02-19 19:24:32,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:32,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782436954] [2021-02-19 19:24:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:32,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782436954] [2021-02-19 19:24:32,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495932528] [2021-02-19 19:24:32,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:32,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:32,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:32,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:32,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:32,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:32,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:32,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396157659] [2021-02-19 19:24:32,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:32,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:32,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:32,211 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:24:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:32,400 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-02-19 19:24:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:24:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:32,403 INFO L225 Difference]: With dead ends: 1728 [2021-02-19 19:24:32,403 INFO L226 Difference]: Without dead ends: 1716 [2021-02-19 19:24:32,403 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:24:32,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-02-19 19:24:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-02-19 19:24:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-02-19 19:24:32,422 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-02-19 19:24:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:32,422 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-02-19 19:24:32,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-02-19 19:24:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-02-19 19:24:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:32,424 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:32,424 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:32,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:32,630 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:32,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:32,630 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-02-19 19:24:32,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:32,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87189146] [2021-02-19 19:24:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:32,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87189146] [2021-02-19 19:24:32,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598970818] [2021-02-19 19:24:32,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:32,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:32,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:32,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:32,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:32,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:32,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:32,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096899678] [2021-02-19 19:24:32,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:32,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:32,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:32,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:32,746 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:33,039 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-02-19 19:24:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:24:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-02-19 19:24:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:33,042 INFO L225 Difference]: With dead ends: 1821 [2021-02-19 19:24:33,042 INFO L226 Difference]: Without dead ends: 1821 [2021-02-19 19:24:33,042 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:24:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-02-19 19:24:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-02-19 19:24:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-02-19 19:24:33,057 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-02-19 19:24:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:33,057 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-02-19 19:24:33,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-02-19 19:24:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:33,059 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:33,059 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:33,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-02-19 19:24:33,273 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-02-19 19:24:33,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:33,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011667846] [2021-02-19 19:24:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:33,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011667846] [2021-02-19 19:24:33,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830755417] [2021-02-19 19:24:33,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:33,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:33,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:33,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:33,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:33,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:33,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:33,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141167303] [2021-02-19 19:24:33,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:33,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:33,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:33,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:33,391 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:33,660 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-02-19 19:24:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:24:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-02-19 19:24:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:33,663 INFO L225 Difference]: With dead ends: 1790 [2021-02-19 19:24:33,663 INFO L226 Difference]: Without dead ends: 1786 [2021-02-19 19:24:33,663 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:24:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-02-19 19:24:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-02-19 19:24:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-02-19 19:24:33,684 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-02-19 19:24:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:33,684 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-02-19 19:24:33,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-02-19 19:24:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-02-19 19:24:33,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:24:33,686 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:33,687 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:33,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 19:24:33,899 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:33,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-02-19 19:24:33,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:33,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519293336] [2021-02-19 19:24:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:33,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519293336] [2021-02-19 19:24:33,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931951175] [2021-02-19 19:24:33,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:33,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:33,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:33,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:33,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:34,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:34,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:34,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268176584] [2021-02-19 19:24:34,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:34,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:34,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:34,004 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:24:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:34,149 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-02-19 19:24:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:24:34,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:24:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:34,153 INFO L225 Difference]: With dead ends: 1649 [2021-02-19 19:24:34,153 INFO L226 Difference]: Without dead ends: 1637 [2021-02-19 19:24:34,153 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:34,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-02-19 19:24:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-02-19 19:24:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-02-19 19:24:34,172 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-02-19 19:24:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:34,173 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-02-19 19:24:34,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-02-19 19:24:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-02-19 19:24:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:34,175 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:34,175 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:34,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:34,391 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-02-19 19:24:34,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:34,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784153464] [2021-02-19 19:24:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:34,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784153464] [2021-02-19 19:24:34,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561430365] [2021-02-19 19:24:34,643 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:34,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:34,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:24:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:34,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:34,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:24:34,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:34,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:34,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:34,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:24:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:34,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:34,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 19:24:34,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593115755] [2021-02-19 19:24:34,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:24:34,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:34,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:24:34,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:34,889 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:35,416 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-02-19 19:24:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:24:35,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:35,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:35,419 INFO L225 Difference]: With dead ends: 1517 [2021-02-19 19:24:35,419 INFO L226 Difference]: Without dead ends: 1502 [2021-02-19 19:24:35,419 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:24:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-02-19 19:24:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-02-19 19:24:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-02-19 19:24:35,440 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-02-19 19:24:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:35,440 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-02-19 19:24:35,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-02-19 19:24:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:35,442 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:35,442 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:35,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 19:24:35,658 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:35,658 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-02-19 19:24:35,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:35,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198330713] [2021-02-19 19:24:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:35,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198330713] [2021-02-19 19:24:35,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6187351] [2021-02-19 19:24:35,874 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 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 [2021-02-19 19:24:35,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:24:35,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:36,098 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-02-19 19:24:36,099 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 66 treesize of output 49 [2021-02-19 19:24:36,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:36,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:36,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:36,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-02-19 19:24:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:36,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:36,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:24:36,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265920796] [2021-02-19 19:24:36,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:36,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:36,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:36,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:36,131 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:36,943 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-02-19 19:24:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:24:36,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:36,946 INFO L225 Difference]: With dead ends: 1495 [2021-02-19 19:24:36,946 INFO L226 Difference]: Without dead ends: 1480 [2021-02-19 19:24:36,946 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:24:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-02-19 19:24:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-02-19 19:24:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-02-19 19:24:36,965 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-02-19 19:24:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:36,965 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-02-19 19:24:36,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-02-19 19:24:36,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:36,967 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:36,967 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:37,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:37,182 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:37,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-02-19 19:24:37,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:37,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539367317] [2021-02-19 19:24:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:37,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539367317] [2021-02-19 19:24:37,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132672] [2021-02-19 19:24:37,525 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 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 [2021-02-19 19:24:37,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:37,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:37,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:24:37,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:37,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:37,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:37,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:37,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:37,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:24:37,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:37,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:37,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:37,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:24:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:37,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:37,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 19:24:37,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506758336] [2021-02-19 19:24:37,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:24:37,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:37,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:24:37,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:24:37,768 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-02-19 19:24:39,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:39,737 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-02-19 19:24:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:24:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:39,740 INFO L225 Difference]: With dead ends: 1658 [2021-02-19 19:24:39,741 INFO L226 Difference]: Without dead ends: 1643 [2021-02-19 19:24:39,741 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:24:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-02-19 19:24:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-02-19 19:24:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-02-19 19:24:39,762 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-02-19 19:24:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:39,762 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-02-19 19:24:39,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-02-19 19:24:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-02-19 19:24:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:39,764 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:39,764 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:39,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 19:24:39,965 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-02-19 19:24:39,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:39,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913738672] [2021-02-19 19:24:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:40,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913738672] [2021-02-19 19:24:40,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153172372] [2021-02-19 19:24:40,214 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 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 [2021-02-19 19:24:40,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:40,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:40,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:24:40,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:40,408 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-02-19 19:24:40,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-02-19 19:24:40,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:40,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:40,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:40,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:22 [2021-02-19 19:24:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:40,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:40,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:24:40,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495003043] [2021-02-19 19:24:40,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:24:40,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:40,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:24:40,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:24:40,466 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:42,105 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-02-19 19:24:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:24:42,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:42,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:42,109 INFO L225 Difference]: With dead ends: 1843 [2021-02-19 19:24:42,109 INFO L226 Difference]: Without dead ends: 1828 [2021-02-19 19:24:42,110 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:24:42,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-02-19 19:24:42,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-02-19 19:24:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-02-19 19:24:42,132 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-02-19 19:24:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:42,132 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-02-19 19:24:42,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-02-19 19:24:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:42,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:42,135 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:42,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:42,335 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-02-19 19:24:42,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:42,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988864649] [2021-02-19 19:24:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:42,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988864649] [2021-02-19 19:24:42,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526812572] [2021-02-19 19:24:42,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:42,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:24:42,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:42,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:42,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:42,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:24:42,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:42,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:42,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:42,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:24:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:42,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:42,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-02-19 19:24:42,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277386576] [2021-02-19 19:24:42,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:24:42,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:42,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:24:42,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:42,849 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:44,841 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-02-19 19:24:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:24:44,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:44,844 INFO L225 Difference]: With dead ends: 1877 [2021-02-19 19:24:44,844 INFO L226 Difference]: Without dead ends: 1862 [2021-02-19 19:24:44,844 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:24:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-02-19 19:24:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-02-19 19:24:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-02-19 19:24:44,858 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-02-19 19:24:44,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:44,858 INFO L480 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-02-19 19:24:44,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-02-19 19:24:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:44,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:44,860 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:45,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 19:24:45,060 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:45,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-02-19 19:24:45,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:45,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572132436] [2021-02-19 19:24:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:45,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572132436] [2021-02-19 19:24:45,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645081645] [2021-02-19 19:24:45,314 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:45,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:45,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:45,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:24:45,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:45,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:45,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:45,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:45,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-02-19 19:24:45,580 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:24:45,601 INFO L628 ElimStorePlain]: treesize reduction 19, result has 57.8 percent of original size [2021-02-19 19:24:45,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:45,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-02-19 19:24:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:45,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:45,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-02-19 19:24:45,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55084570] [2021-02-19 19:24:45,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:45,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:45,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:45,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:45,685 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:47,296 INFO L93 Difference]: Finished difference Result 2109 states and 6703 transitions. [2021-02-19 19:24:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:24:47,296 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:47,300 INFO L225 Difference]: With dead ends: 2109 [2021-02-19 19:24:47,300 INFO L226 Difference]: Without dead ends: 2094 [2021-02-19 19:24:47,300 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:24:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-02-19 19:24:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 1219. [2021-02-19 19:24:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-02-19 19:24:47,324 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-02-19 19:24:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:47,324 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-02-19 19:24:47,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-02-19 19:24:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:47,326 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:47,326 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:47,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-02-19 19:24:47,527 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:47,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:47,527 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-02-19 19:24:47,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:47,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298666239] [2021-02-19 19:24:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:47,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298666239] [2021-02-19 19:24:47,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987665930] [2021-02-19 19:24:47,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:24:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:47,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:24:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:47,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:47,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:47,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:24:47,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:47,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:47,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:47,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:24:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:47,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:47,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 19:24:47,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394847098] [2021-02-19 19:24:47,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:24:47,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:47,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:24:47,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:47,980 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:48,627 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-02-19 19:24:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:24:48,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:48,630 INFO L225 Difference]: With dead ends: 1622 [2021-02-19 19:24:48,630 INFO L226 Difference]: Without dead ends: 1607 [2021-02-19 19:24:48,631 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:24:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-02-19 19:24:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-02-19 19:24:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-02-19 19:24:48,651 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-02-19 19:24:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:48,651 INFO L480 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-02-19 19:24:48,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-02-19 19:24:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:48,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:48,653 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:48,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 19:24:48,867 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:48,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-02-19 19:24:48,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:48,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922635944] [2021-02-19 19:24:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:49,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922635944] [2021-02-19 19:24:49,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532581011] [2021-02-19 19:24:49,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:49,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:49,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:24:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:49,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:49,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-02-19 19:24:49,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:49,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:49,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:49,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:35 [2021-02-19 19:24:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:49,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:49,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:24:49,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331385022] [2021-02-19 19:24:49,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:49,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:49,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:49,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:49,371 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:51,127 INFO L93 Difference]: Finished difference Result 1847 states and 5891 transitions. [2021-02-19 19:24:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:24:51,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:51,131 INFO L225 Difference]: With dead ends: 1847 [2021-02-19 19:24:51,131 INFO L226 Difference]: Without dead ends: 1832 [2021-02-19 19:24:51,132 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:24:51,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-02-19 19:24:51,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1241. [2021-02-19 19:24:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-02-19 19:24:51,154 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-02-19 19:24:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:51,154 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-02-19 19:24:51,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-02-19 19:24:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:51,156 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:51,156 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:51,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 19:24:51,357 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-02-19 19:24:51,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:51,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467198093] [2021-02-19 19:24:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:51,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467198093] [2021-02-19 19:24:51,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182940476] [2021-02-19 19:24:51,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:51,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:51,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:24:51,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:51,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:51,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:24:51,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:51,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:51,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:51,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:24:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:51,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:51,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 19:24:51,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778162123] [2021-02-19 19:24:51,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:24:51,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:51,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:24:51,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:51,775 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:52,652 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-02-19 19:24:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:24:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:52,656 INFO L225 Difference]: With dead ends: 1876 [2021-02-19 19:24:52,656 INFO L226 Difference]: Without dead ends: 1861 [2021-02-19 19:24:52,656 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:24:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-02-19 19:24:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-02-19 19:24:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-02-19 19:24:52,680 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-02-19 19:24:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:52,680 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-02-19 19:24:52,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-02-19 19:24:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:52,683 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:52,683 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:52,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:52,898 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-02-19 19:24:52,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:52,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649307439] [2021-02-19 19:24:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:53,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649307439] [2021-02-19 19:24:53,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290582943] [2021-02-19 19:24:53,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:53,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:53,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:24:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:53,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:53,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:24:53,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:53,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:24:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:53,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:53,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-02-19 19:24:53,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559821668] [2021-02-19 19:24:53,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:24:53,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:24:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:24:53,289 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-02-19 19:24:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:53,714 INFO L93 Difference]: Finished difference Result 1393 states and 4580 transitions. [2021-02-19 19:24:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:24:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-02-19 19:24:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:53,717 INFO L225 Difference]: With dead ends: 1393 [2021-02-19 19:24:53,717 INFO L226 Difference]: Without dead ends: 1378 [2021-02-19 19:24:53,718 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:24:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-02-19 19:24:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1246. [2021-02-19 19:24:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-02-19 19:24:53,736 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-02-19 19:24:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:53,736 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-02-19 19:24:53,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-02-19 19:24:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-02-19 19:24:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:53,739 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:53,739 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:53,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:53,939 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:53,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-02-19 19:24:53,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:53,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616135807] [2021-02-19 19:24:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:54,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616135807] [2021-02-19 19:24:54,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575861109] [2021-02-19 19:24:54,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:54,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:54,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:54,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:24:54,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:54,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:54,333 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-02-19 19:24:54,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 59 [2021-02-19 19:24:54,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:54,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:54,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:54,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:21 [2021-02-19 19:24:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:54,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:54,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:24:54,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273120353] [2021-02-19 19:24:54,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:54,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:54,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:54,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:54,401 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:55,997 INFO L93 Difference]: Finished difference Result 2076 states and 6735 transitions. [2021-02-19 19:24:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:24:55,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:56,001 INFO L225 Difference]: With dead ends: 2076 [2021-02-19 19:24:56,001 INFO L226 Difference]: Without dead ends: 2061 [2021-02-19 19:24:56,001 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:24:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-02-19 19:24:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1246. [2021-02-19 19:24:56,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-02-19 19:24:56,026 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-02-19 19:24:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:56,027 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-02-19 19:24:56,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-02-19 19:24:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:56,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:56,029 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:56,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 19:24:56,229 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:56,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:56,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 12 times [2021-02-19 19:24:56,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:56,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22374861] [2021-02-19 19:24:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:56,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22374861] [2021-02-19 19:24:56,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473903376] [2021-02-19 19:24:56,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:56,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:56,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:56,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:24:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:56,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:56,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:56,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:24:56,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:24:56,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:56,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:56,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-02-19 19:24:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:56,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:56,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:24:56,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142571834] [2021-02-19 19:24:56,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:24:56,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:56,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:24:56,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:24:56,674 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:58,210 INFO L93 Difference]: Finished difference Result 1890 states and 6145 transitions. [2021-02-19 19:24:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:24:58,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:24:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:58,214 INFO L225 Difference]: With dead ends: 1890 [2021-02-19 19:24:58,214 INFO L226 Difference]: Without dead ends: 1875 [2021-02-19 19:24:58,215 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:24:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-02-19 19:24:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1246. [2021-02-19 19:24:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-02-19 19:24:58,237 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-02-19 19:24:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:58,237 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-02-19 19:24:58,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-02-19 19:24:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:24:58,240 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:58,240 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:58,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 19:24:58,440 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-02-19 19:24:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:58,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689579371] [2021-02-19 19:24:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:58,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689579371] [2021-02-19 19:24:58,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014689707] [2021-02-19 19:24:58,694 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:58,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:58,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:58,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:24:58,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:58,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:58,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:58,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:58,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:58,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:24:58,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:58,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:58,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:58,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:24:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:58,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:58,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-02-19 19:24:58,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175832073] [2021-02-19 19:24:58,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:24:58,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:24:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:24:58,904 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-02-19 19:25:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:01,028 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-02-19 19:25:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:25:01,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:01,034 INFO L225 Difference]: With dead ends: 2938 [2021-02-19 19:25:01,034 INFO L226 Difference]: Without dead ends: 2893 [2021-02-19 19:25:01,034 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 19:25:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-02-19 19:25:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-02-19 19:25:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-02-19 19:25:01,063 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-02-19 19:25:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:01,063 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-02-19 19:25:01,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-02-19 19:25:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-02-19 19:25:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:01,065 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:01,066 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:01,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:01,280 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-02-19 19:25:01,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:01,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598227429] [2021-02-19 19:25:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:01,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598227429] [2021-02-19 19:25:01,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381429953] [2021-02-19 19:25:01,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:01,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:25:01,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:01,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:25:01,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:01,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:01,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:25:01,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:01,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:01,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:01,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:25:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:01,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:01,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-02-19 19:25:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139255875] [2021-02-19 19:25:01,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:01,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:01,748 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-02-19 19:25:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:03,839 INFO L93 Difference]: Finished difference Result 2772 states and 8760 transitions. [2021-02-19 19:25:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:25:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:03,844 INFO L225 Difference]: With dead ends: 2772 [2021-02-19 19:25:03,844 INFO L226 Difference]: Without dead ends: 2727 [2021-02-19 19:25:03,844 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:25:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-02-19 19:25:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 1288. [2021-02-19 19:25:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-02-19 19:25:03,872 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-02-19 19:25:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:03,872 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-02-19 19:25:03,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-02-19 19:25:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-02-19 19:25:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:03,875 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:03,875 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:04,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:04,075 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:04,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:04,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-02-19 19:25:04,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:04,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746268694] [2021-02-19 19:25:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:04,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746268694] [2021-02-19 19:25:04,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139129523] [2021-02-19 19:25:04,336 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 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 [2021-02-19 19:25:04,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:25:04,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:04,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:04,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:04,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-02-19 19:25:04,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:25:04,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:04,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:04,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-02-19 19:25:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:04,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:04,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-02-19 19:25:04,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130886593] [2021-02-19 19:25:04,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:04,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:04,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:04,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:04,560 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-02-19 19:25:06,174 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 19:25:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:07,352 INFO L93 Difference]: Finished difference Result 3091 states and 9690 transitions. [2021-02-19 19:25:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:25:07,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:07,357 INFO L225 Difference]: With dead ends: 3091 [2021-02-19 19:25:07,357 INFO L226 Difference]: Without dead ends: 3046 [2021-02-19 19:25:07,358 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 19:25:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-02-19 19:25:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 1292. [2021-02-19 19:25:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-02-19 19:25:07,400 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-02-19 19:25:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:07,401 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-02-19 19:25:07,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-02-19 19:25:07,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-02-19 19:25:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:07,403 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:07,403 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:07,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-02-19 19:25:07,608 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-02-19 19:25:07,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:07,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197003401] [2021-02-19 19:25:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197003401] [2021-02-19 19:25:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534269179] [2021-02-19 19:25:07,837 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 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 [2021-02-19 19:25:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:07,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:08,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:08,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:08,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:25:08,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:08,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:08,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:08,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:25:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:08,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:08,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 19:25:08,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792549536] [2021-02-19 19:25:08,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:25:08,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:08,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:25:08,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:25:08,104 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:08,618 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-02-19 19:25:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:25:08,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:08,622 INFO L225 Difference]: With dead ends: 1654 [2021-02-19 19:25:08,622 INFO L226 Difference]: Without dead ends: 1639 [2021-02-19 19:25:08,622 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:25:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-02-19 19:25:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-02-19 19:25:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-02-19 19:25:08,641 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-02-19 19:25:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:08,641 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-02-19 19:25:08,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-02-19 19:25:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:08,643 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:08,643 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:08,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 19:25:08,844 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:08,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:08,844 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-02-19 19:25:08,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:08,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277993394] [2021-02-19 19:25:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:09,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277993394] [2021-02-19 19:25:09,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501094644] [2021-02-19 19:25:09,057 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 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 [2021-02-19 19:25:09,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:25:09,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:09,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:25:09,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:09,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:09,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-02-19 19:25:09,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:09,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:09,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:09,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:91 [2021-02-19 19:25:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:09,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:09,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:25:09,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318549795] [2021-02-19 19:25:09,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:25:09,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:09,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:25:09,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:25:09,367 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:11,152 INFO L93 Difference]: Finished difference Result 1924 states and 6179 transitions. [2021-02-19 19:25:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:25:11,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:11,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:11,156 INFO L225 Difference]: With dead ends: 1924 [2021-02-19 19:25:11,157 INFO L226 Difference]: Without dead ends: 1894 [2021-02-19 19:25:11,157 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:25:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-02-19 19:25:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1297. [2021-02-19 19:25:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-02-19 19:25:11,181 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-02-19 19:25:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:11,181 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-02-19 19:25:11,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-02-19 19:25:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:11,184 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:11,184 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:11,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:11,385 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:11,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1363716195, now seen corresponding path program 15 times [2021-02-19 19:25:11,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:11,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436831230] [2021-02-19 19:25:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:11,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436831230] [2021-02-19 19:25:11,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493661286] [2021-02-19 19:25:11,630 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 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 [2021-02-19 19:25:11,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:25:11,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:11,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:25:11,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:11,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:11,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-02-19 19:25:11,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:11,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:11,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:11,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:77 [2021-02-19 19:25:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:11,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:11,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-02-19 19:25:11,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793065011] [2021-02-19 19:25:11,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:11,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:11,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:11,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:11,969 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:13,522 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-02-19 19:25:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:25:13,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:13,526 INFO L225 Difference]: With dead ends: 2000 [2021-02-19 19:25:13,526 INFO L226 Difference]: Without dead ends: 1985 [2021-02-19 19:25:13,527 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:25:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-02-19 19:25:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1306. [2021-02-19 19:25:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-02-19 19:25:13,552 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-02-19 19:25:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:13,552 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-02-19 19:25:13,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-02-19 19:25:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:13,554 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:13,554 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:13,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:13,766 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:13,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 16 times [2021-02-19 19:25:13,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:13,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515435500] [2021-02-19 19:25:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:14,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515435500] [2021-02-19 19:25:14,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435469554] [2021-02-19 19:25:14,024 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:14,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:25:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:25:14,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:14,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:14,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:14,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:25:14,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:14,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:14,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:14,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:25:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:14,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:14,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-02-19 19:25:14,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022694072] [2021-02-19 19:25:14,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:25:14,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:14,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:25:14,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:25:14,219 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-02-19 19:25:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:14,472 INFO L93 Difference]: Finished difference Result 1441 states and 4791 transitions. [2021-02-19 19:25:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 19:25:14,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-02-19 19:25:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:14,475 INFO L225 Difference]: With dead ends: 1441 [2021-02-19 19:25:14,475 INFO L226 Difference]: Without dead ends: 1426 [2021-02-19 19:25:14,475 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:25:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-02-19 19:25:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1309. [2021-02-19 19:25:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3929663608562692) internal successors, (4438), 1308 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4438 transitions. [2021-02-19 19:25:14,488 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4438 transitions. Word has length 26 [2021-02-19 19:25:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:14,488 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4438 transitions. [2021-02-19 19:25:14,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-02-19 19:25:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4438 transitions. [2021-02-19 19:25:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:14,490 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:14,490 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:14,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:14,704 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash -871608925, now seen corresponding path program 17 times [2021-02-19 19:25:14,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:14,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716074257] [2021-02-19 19:25:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:14,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716074257] [2021-02-19 19:25:14,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439801075] [2021-02-19 19:25:14,917 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 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 [2021-02-19 19:25:14,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:25:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:25:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:15,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:15,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:15,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:25:15,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:25:15,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:15,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:15,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-02-19 19:25:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:15,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:15,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:25:15,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17547604] [2021-02-19 19:25:15,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:25:15,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:15,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:25:15,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:25:15,198 INFO L87 Difference]: Start difference. First operand 1309 states and 4438 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:16,807 INFO L93 Difference]: Finished difference Result 2201 states and 7163 transitions. [2021-02-19 19:25:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:25:16,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:16,811 INFO L225 Difference]: With dead ends: 2201 [2021-02-19 19:25:16,811 INFO L226 Difference]: Without dead ends: 2171 [2021-02-19 19:25:16,812 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:25:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-02-19 19:25:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1306. [2021-02-19 19:25:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-02-19 19:25:16,837 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-02-19 19:25:16,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:16,837 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-02-19 19:25:16,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-02-19 19:25:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:16,840 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:16,840 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:17,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-02-19 19:25:17,041 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:17,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 18 times [2021-02-19 19:25:17,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:17,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822169934] [2021-02-19 19:25:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:17,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822169934] [2021-02-19 19:25:17,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124126779] [2021-02-19 19:25:17,287 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 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 [2021-02-19 19:25:17,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:25:17,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:17,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:17,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:17,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:17,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:25:17,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:25:17,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:17,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:17,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-02-19 19:25:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:17,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:17,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:25:17,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087026695] [2021-02-19 19:25:17,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:17,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:17,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:17,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:17,521 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:18,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:18,648 INFO L93 Difference]: Finished difference Result 1909 states and 6282 transitions. [2021-02-19 19:25:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:25:18,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:18,651 INFO L225 Difference]: With dead ends: 1909 [2021-02-19 19:25:18,651 INFO L226 Difference]: Without dead ends: 1894 [2021-02-19 19:25:18,651 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:25:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-02-19 19:25:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1303. [2021-02-19 19:25:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.387864823348694) internal successors, (4411), 1302 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:18,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4411 transitions. [2021-02-19 19:25:18,668 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4411 transitions. Word has length 26 [2021-02-19 19:25:18,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:18,668 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 4411 transitions. [2021-02-19 19:25:18,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:18,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4411 transitions. [2021-02-19 19:25:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:18,670 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:18,670 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:18,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:18,870 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 19 times [2021-02-19 19:25:18,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:18,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530557896] [2021-02-19 19:25:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:19,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530557896] [2021-02-19 19:25:19,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496611044] [2021-02-19 19:25:19,130 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:25:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:19,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:19,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:19,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:19,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:25:19,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:19,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:19,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:19,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:25:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:19,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:19,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 19:25:19,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720937852] [2021-02-19 19:25:19,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:25:19,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:19,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:25:19,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:25:19,388 INFO L87 Difference]: Start difference. First operand 1303 states and 4411 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:19,982 INFO L93 Difference]: Finished difference Result 1736 states and 5716 transitions. [2021-02-19 19:25:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:25:19,982 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:19,985 INFO L225 Difference]: With dead ends: 1736 [2021-02-19 19:25:19,986 INFO L226 Difference]: Without dead ends: 1715 [2021-02-19 19:25:19,986 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:25:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-02-19 19:25:20,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1344. [2021-02-19 19:25:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3827252419955323) internal successors, (4543), 1343 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4543 transitions. [2021-02-19 19:25:20,009 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4543 transitions. Word has length 26 [2021-02-19 19:25:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:20,009 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 4543 transitions. [2021-02-19 19:25:20,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4543 transitions. [2021-02-19 19:25:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:20,012 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:20,012 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:20,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-02-19 19:25:20,226 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:20,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:20,226 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 20 times [2021-02-19 19:25:20,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:20,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569103852] [2021-02-19 19:25:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:20,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569103852] [2021-02-19 19:25:20,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836994882] [2021-02-19 19:25:20,518 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 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 [2021-02-19 19:25:20,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:25:20,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:20,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:25:20,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:20,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:20,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-02-19 19:25:20,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:20,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:20,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:20,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:89 [2021-02-19 19:25:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:20,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:20,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-02-19 19:25:20,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730774999] [2021-02-19 19:25:20,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:25:20,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:20,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:25:20,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:25:20,888 INFO L87 Difference]: Start difference. First operand 1344 states and 4543 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:22,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:22,296 INFO L93 Difference]: Finished difference Result 1754 states and 5590 transitions. [2021-02-19 19:25:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:25:22,296 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:22,299 INFO L225 Difference]: With dead ends: 1754 [2021-02-19 19:25:22,299 INFO L226 Difference]: Without dead ends: 1729 [2021-02-19 19:25:22,300 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:25:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-02-19 19:25:22,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1358. [2021-02-19 19:25:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3920412675018423) internal successors, (4603), 1357 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4603 transitions. [2021-02-19 19:25:22,320 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4603 transitions. Word has length 26 [2021-02-19 19:25:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:22,321 INFO L480 AbstractCegarLoop]: Abstraction has 1358 states and 4603 transitions. [2021-02-19 19:25:22,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4603 transitions. [2021-02-19 19:25:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:22,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:22,323 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:22,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:22,524 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:22,527 INFO L82 PathProgramCache]: Analyzing trace with hash 638446221, now seen corresponding path program 21 times [2021-02-19 19:25:22,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:22,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186823303] [2021-02-19 19:25:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:22,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186823303] [2021-02-19 19:25:22,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663400216] [2021-02-19 19:25:22,805 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 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 [2021-02-19 19:25:22,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:25:22,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:22,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:25:22,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:22,984 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-02-19 19:25:22,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-02-19 19:25:22,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:22,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:22,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:22,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-02-19 19:25:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:23,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:23,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 19:25:23,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263234829] [2021-02-19 19:25:23,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:23,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:23,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:23,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:23,052 INFO L87 Difference]: Start difference. First operand 1358 states and 4603 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:23,947 INFO L93 Difference]: Finished difference Result 1743 states and 5751 transitions. [2021-02-19 19:25:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:25:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:23,951 INFO L225 Difference]: With dead ends: 1743 [2021-02-19 19:25:23,951 INFO L226 Difference]: Without dead ends: 1714 [2021-02-19 19:25:23,951 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:25:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-02-19 19:25:23,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1361. [2021-02-19 19:25:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.3926470588235293) internal successors, (4614), 1360 states have internal predecessors, (4614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4614 transitions. [2021-02-19 19:25:23,974 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4614 transitions. Word has length 26 [2021-02-19 19:25:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:23,974 INFO L480 AbstractCegarLoop]: Abstraction has 1361 states and 4614 transitions. [2021-02-19 19:25:23,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4614 transitions. [2021-02-19 19:25:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:23,976 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:23,976 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:24,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 19:25:24,177 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:24,177 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 22 times [2021-02-19 19:25:24,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:24,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990235230] [2021-02-19 19:25:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:24,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990235230] [2021-02-19 19:25:24,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645405681] [2021-02-19 19:25:24,475 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 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 [2021-02-19 19:25:24,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:25:24,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:24,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:25:24,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:24,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:24,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:24,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:25:24,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:24,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:24,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:24,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:25:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:24,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:24,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-02-19 19:25:24,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531305193] [2021-02-19 19:25:24,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:25:24,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:24,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:25:24,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:25:24,712 INFO L87 Difference]: Start difference. First operand 1361 states and 4614 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-02-19 19:25:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:25,123 INFO L93 Difference]: Finished difference Result 1474 states and 4920 transitions. [2021-02-19 19:25:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 19:25:25,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-02-19 19:25:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:25,126 INFO L225 Difference]: With dead ends: 1474 [2021-02-19 19:25:25,126 INFO L226 Difference]: Without dead ends: 1459 [2021-02-19 19:25:25,127 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:25:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-02-19 19:25:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1367. [2021-02-19 19:25:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.394582723279649) internal successors, (4637), 1366 states have internal predecessors, (4637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4637 transitions. [2021-02-19 19:25:25,147 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4637 transitions. Word has length 26 [2021-02-19 19:25:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:25,148 INFO L480 AbstractCegarLoop]: Abstraction has 1367 states and 4637 transitions. [2021-02-19 19:25:25,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-02-19 19:25:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4637 transitions. [2021-02-19 19:25:25,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:25,150 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:25,150 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:25,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:25,352 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:25,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1766954001, now seen corresponding path program 23 times [2021-02-19 19:25:25,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:25,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450958672] [2021-02-19 19:25:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:25,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450958672] [2021-02-19 19:25:25,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322150273] [2021-02-19 19:25:25,614 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 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 [2021-02-19 19:25:25,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:25:25,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:25:25,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:25,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:25,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:25:25,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:25:25,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:25,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:25,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-02-19 19:25:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:25,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:25,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:25:25,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116696033] [2021-02-19 19:25:25,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:25:25,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:25,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:25:25,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:25:25,952 INFO L87 Difference]: Start difference. First operand 1367 states and 4637 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:26,661 INFO L93 Difference]: Finished difference Result 1826 states and 6031 transitions. [2021-02-19 19:25:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:25:26,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:26,665 INFO L225 Difference]: With dead ends: 1826 [2021-02-19 19:25:26,665 INFO L226 Difference]: Without dead ends: 1801 [2021-02-19 19:25:26,665 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:25:26,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-02-19 19:25:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1374. [2021-02-19 19:25:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.3991260014566644) internal successors, (4667), 1373 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4667 transitions. [2021-02-19 19:25:26,688 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4667 transitions. Word has length 26 [2021-02-19 19:25:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:26,688 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4667 transitions. [2021-02-19 19:25:26,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4667 transitions. [2021-02-19 19:25:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:26,691 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:26,691 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:26,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-02-19 19:25:26,898 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:26,898 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 24 times [2021-02-19 19:25:26,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:26,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140580696] [2021-02-19 19:25:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:27,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140580696] [2021-02-19 19:25:27,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631872631] [2021-02-19 19:25:27,133 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 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 [2021-02-19 19:25:27,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:25:27,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:27,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:27,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:27,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:27,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:27,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-02-19 19:25:27,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:25:27,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:27,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:27,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-02-19 19:25:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:27,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:27,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:25:27,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035262015] [2021-02-19 19:25:27,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:27,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:27,371 INFO L87 Difference]: Start difference. First operand 1374 states and 4667 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:28,274 INFO L93 Difference]: Finished difference Result 1851 states and 6138 transitions. [2021-02-19 19:25:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:25:28,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:28,278 INFO L225 Difference]: With dead ends: 1851 [2021-02-19 19:25:28,278 INFO L226 Difference]: Without dead ends: 1832 [2021-02-19 19:25:28,278 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:25:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-02-19 19:25:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1386. [2021-02-19 19:25:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-02-19 19:25:28,303 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-02-19 19:25:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:28,303 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-02-19 19:25:28,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-02-19 19:25:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:28,306 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:28,306 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:28,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-02-19 19:25:28,518 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:28,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 25 times [2021-02-19 19:25:28,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:28,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093039847] [2021-02-19 19:25:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:28,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093039847] [2021-02-19 19:25:28,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197591213] [2021-02-19 19:25:28,761 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 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 [2021-02-19 19:25:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:28,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:28,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:28,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:28,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:25:28,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:25:28,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:28,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:28,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-02-19 19:25:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:28,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:28,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 19:25:28,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026557889] [2021-02-19 19:25:28,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:25:28,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:28,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:25:28,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:25:28,972 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:29,440 INFO L93 Difference]: Finished difference Result 1888 states and 6257 transitions. [2021-02-19 19:25:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:25:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:29,444 INFO L225 Difference]: With dead ends: 1888 [2021-02-19 19:25:29,444 INFO L226 Difference]: Without dead ends: 1863 [2021-02-19 19:25:29,445 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:25:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-02-19 19:25:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1386. [2021-02-19 19:25:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-02-19 19:25:29,462 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-02-19 19:25:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:29,462 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-02-19 19:25:29,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-02-19 19:25:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:29,464 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:29,464 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:29,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 19:25:29,664 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:29,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-02-19 19:25:29,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:29,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401004242] [2021-02-19 19:25:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:30,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401004242] [2021-02-19 19:25:30,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581564382] [2021-02-19 19:25:30,047 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) [2021-02-19 19:25:30,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:25:30,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:25:30,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:30,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:30,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:30,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:30,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:25:30,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:30,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:30,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:30,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:25:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:30,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:30,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 19:25:30,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012956565] [2021-02-19 19:25:30,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:30,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:30,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:30,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:30,288 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-02-19 19:25:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:31,598 INFO L93 Difference]: Finished difference Result 1823 states and 6011 transitions. [2021-02-19 19:25:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:25:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:31,602 INFO L225 Difference]: With dead ends: 1823 [2021-02-19 19:25:31,602 INFO L226 Difference]: Without dead ends: 1797 [2021-02-19 19:25:31,603 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:25:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-02-19 19:25:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1398. [2021-02-19 19:25:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.397279885468862) internal successors, (4746), 1397 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4746 transitions. [2021-02-19 19:25:31,625 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4746 transitions. Word has length 26 [2021-02-19 19:25:31,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:31,626 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4746 transitions. [2021-02-19 19:25:31,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-02-19 19:25:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4746 transitions. [2021-02-19 19:25:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:31,628 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:31,628 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:31,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:31,829 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:31,829 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-02-19 19:25:31,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:31,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506570559] [2021-02-19 19:25:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:32,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506570559] [2021-02-19 19:25:32,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838369356] [2021-02-19 19:25:32,216 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 [2021-02-19 19:25:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:32,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:32,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:32,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:32,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:32,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:25:32,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:32,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:32,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:32,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:25:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:32,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:32,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-02-19 19:25:32,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133748010] [2021-02-19 19:25:32,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:25:32,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:32,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:25:32,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:25:32,422 INFO L87 Difference]: Start difference. First operand 1398 states and 4746 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:33,630 INFO L93 Difference]: Finished difference Result 1968 states and 6512 transitions. [2021-02-19 19:25:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:25:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:33,634 INFO L225 Difference]: With dead ends: 1968 [2021-02-19 19:25:33,635 INFO L226 Difference]: Without dead ends: 1953 [2021-02-19 19:25:33,635 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:25:33,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-02-19 19:25:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-02-19 19:25:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.397279885468862) internal successors, (4746), 1397 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4746 transitions. [2021-02-19 19:25:33,660 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4746 transitions. Word has length 26 [2021-02-19 19:25:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:33,660 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4746 transitions. [2021-02-19 19:25:33,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4746 transitions. [2021-02-19 19:25:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:33,662 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:33,662 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:33,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-02-19 19:25:33,878 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:33,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 26 times [2021-02-19 19:25:33,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:33,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381268946] [2021-02-19 19:25:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:34,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381268946] [2021-02-19 19:25:34,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270450848] [2021-02-19 19:25:34,159 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 [2021-02-19 19:25:34,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:25:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:34,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:34,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:34,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:34,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:34,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:25:34,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:25:34,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:34,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:34,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-02-19 19:25:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:34,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:34,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:25:34,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520755531] [2021-02-19 19:25:34,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:34,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:34,418 INFO L87 Difference]: Start difference. First operand 1398 states and 4746 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:35,918 INFO L93 Difference]: Finished difference Result 2014 states and 6565 transitions. [2021-02-19 19:25:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:25:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:35,921 INFO L225 Difference]: With dead ends: 2014 [2021-02-19 19:25:35,921 INFO L226 Difference]: Without dead ends: 1995 [2021-02-19 19:25:35,921 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:25:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-02-19 19:25:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1407. [2021-02-19 19:25:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 3.3975817923186344) internal successors, (4777), 1406 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4777 transitions. [2021-02-19 19:25:35,940 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4777 transitions. Word has length 26 [2021-02-19 19:25:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:35,940 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 4777 transitions. [2021-02-19 19:25:35,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:35,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4777 transitions. [2021-02-19 19:25:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:35,942 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:35,942 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:36,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:36,142 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:36,142 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-02-19 19:25:36,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:36,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076851501] [2021-02-19 19:25:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:36,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076851501] [2021-02-19 19:25:36,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521923478] [2021-02-19 19:25:36,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:36,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:25:36,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:36,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:36,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:36,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:36,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:36,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:36,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:25:36,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:36,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:36,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:36,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:25:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:36,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:36,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-02-19 19:25:36,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180662129] [2021-02-19 19:25:36,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:25:36,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:36,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:25:36,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:25:36,720 INFO L87 Difference]: Start difference. First operand 1407 states and 4777 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:38,455 INFO L93 Difference]: Finished difference Result 2051 states and 6623 transitions. [2021-02-19 19:25:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:25:38,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:38,460 INFO L225 Difference]: With dead ends: 2051 [2021-02-19 19:25:38,460 INFO L226 Difference]: Without dead ends: 2029 [2021-02-19 19:25:38,460 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:25:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-02-19 19:25:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1414. [2021-02-19 19:25:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.3984430290162773) internal successors, (4802), 1413 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4802 transitions. [2021-02-19 19:25:38,484 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4802 transitions. Word has length 26 [2021-02-19 19:25:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:38,484 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4802 transitions. [2021-02-19 19:25:38,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4802 transitions. [2021-02-19 19:25:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:38,486 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:38,486 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:38,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-02-19 19:25:38,687 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-02-19 19:25:38,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:38,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675931339] [2021-02-19 19:25:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:38,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675931339] [2021-02-19 19:25:38,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594958145] [2021-02-19 19:25:38,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:25:38,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:25:38,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:38,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:25:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:39,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:39,336 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 59 [2021-02-19 19:25:39,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:25:39,727 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2021-02-19 19:25:39,728 INFO L628 ElimStorePlain]: treesize reduction 196, result has 42.5 percent of original size [2021-02-19 19:25:39,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:39,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:530 [2021-02-19 19:25:40,143 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-02-19 19:25:40,347 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-02-19 19:25:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:40,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:40,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-02-19 19:25:40,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735635182] [2021-02-19 19:25:40,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:25:40,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:40,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:25:40,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:25:40,385 INFO L87 Difference]: Start difference. First operand 1414 states and 4802 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:43,800 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-02-19 19:25:44,133 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-02-19 19:25:44,343 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-02-19 19:25:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:44,408 INFO L93 Difference]: Finished difference Result 2512 states and 8095 transitions. [2021-02-19 19:25:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:25:44,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:44,413 INFO L225 Difference]: With dead ends: 2512 [2021-02-19 19:25:44,413 INFO L226 Difference]: Without dead ends: 2497 [2021-02-19 19:25:44,413 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 19:25:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-02-19 19:25:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1424. [2021-02-19 19:25:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.399156711173577) internal successors, (4837), 1423 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4837 transitions. [2021-02-19 19:25:44,439 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4837 transitions. Word has length 26 [2021-02-19 19:25:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:44,439 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 4837 transitions. [2021-02-19 19:25:44,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4837 transitions. [2021-02-19 19:25:44,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:44,441 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:44,441 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:44,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:44,642 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:44,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:44,642 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-02-19 19:25:44,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:44,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600640466] [2021-02-19 19:25:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:44,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600640466] [2021-02-19 19:25:44,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806021171] [2021-02-19 19:25:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:44,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:25:44,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:25:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:45,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:45,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:45,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:45,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:45,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:25:45,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:45,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:45,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:45,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:25:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:45,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:45,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-02-19 19:25:45,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589441641] [2021-02-19 19:25:45,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:45,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:45,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:45,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:45,133 INFO L87 Difference]: Start difference. First operand 1424 states and 4837 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-02-19 19:25:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:47,166 INFO L93 Difference]: Finished difference Result 3025 states and 9657 transitions. [2021-02-19 19:25:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:25:47,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:47,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:47,171 INFO L225 Difference]: With dead ends: 3025 [2021-02-19 19:25:47,171 INFO L226 Difference]: Without dead ends: 2989 [2021-02-19 19:25:47,171 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:25:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-02-19 19:25:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 1557. [2021-02-19 19:25:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.417095115681234) internal successors, (5317), 1556 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5317 transitions. [2021-02-19 19:25:47,196 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5317 transitions. Word has length 26 [2021-02-19 19:25:47,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:47,196 INFO L480 AbstractCegarLoop]: Abstraction has 1557 states and 5317 transitions. [2021-02-19 19:25:47,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-02-19 19:25:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5317 transitions. [2021-02-19 19:25:47,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:47,198 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:47,198 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:47,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-02-19 19:25:47,398 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:47,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:47,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-02-19 19:25:47,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:47,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745262383] [2021-02-19 19:25:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745262383] [2021-02-19 19:25:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216965515] [2021-02-19 19:25:47,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:47,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:25:47,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:47,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:47,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:47,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:47,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:47,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-02-19 19:25:47,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:25:47,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:47,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:47,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-02-19 19:25:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:47,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:47,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-02-19 19:25:47,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207452407] [2021-02-19 19:25:47,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:47,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:47,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:47,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:47,891 INFO L87 Difference]: Start difference. First operand 1557 states and 5317 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-02-19 19:25:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:50,354 INFO L93 Difference]: Finished difference Result 3407 states and 10755 transitions. [2021-02-19 19:25:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:25:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:50,359 INFO L225 Difference]: With dead ends: 3407 [2021-02-19 19:25:50,359 INFO L226 Difference]: Without dead ends: 3350 [2021-02-19 19:25:50,360 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:25:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-02-19 19:25:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1580. [2021-02-19 19:25:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-02-19 19:25:50,389 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-02-19 19:25:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:50,389 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-02-19 19:25:50,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-02-19 19:25:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-02-19 19:25:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:50,391 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:50,391 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:50,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:50,592 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:50,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:50,592 INFO L82 PathProgramCache]: Analyzing trace with hash 134504147, now seen corresponding path program 27 times [2021-02-19 19:25:50,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:50,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338994319] [2021-02-19 19:25:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:50,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338994319] [2021-02-19 19:25:50,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718351332] [2021-02-19 19:25:50,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:25:50,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:25:50,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:50,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:25:50,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:51,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:51,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-02-19 19:25:51,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:51,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:51,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:25:51,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:182 [2021-02-19 19:25:51,322 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-02-19 19:25:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:51,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:51,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-02-19 19:25:51,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977088124] [2021-02-19 19:25:51,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:51,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:51,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:51,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:51,368 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:53,548 INFO L93 Difference]: Finished difference Result 2188 states and 7228 transitions. [2021-02-19 19:25:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:25:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:53,551 INFO L225 Difference]: With dead ends: 2188 [2021-02-19 19:25:53,551 INFO L226 Difference]: Without dead ends: 2158 [2021-02-19 19:25:53,552 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:25:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-02-19 19:25:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1591. [2021-02-19 19:25:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.419496855345912) internal successors, (5437), 1590 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5437 transitions. [2021-02-19 19:25:53,570 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5437 transitions. Word has length 26 [2021-02-19 19:25:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:53,570 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5437 transitions. [2021-02-19 19:25:53,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5437 transitions. [2021-02-19 19:25:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:53,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:53,572 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:53,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-02-19 19:25:53,773 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1483028633, now seen corresponding path program 28 times [2021-02-19 19:25:53,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:53,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664000997] [2021-02-19 19:25:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:53,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664000997] [2021-02-19 19:25:53,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961798215] [2021-02-19 19:25:53,965 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 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 [2021-02-19 19:25:53,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:25:53,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:53,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:54,127 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-02-19 19:25:54,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-02-19 19:25:54,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:54,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:54,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:54,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:22 [2021-02-19 19:25:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:54,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:54,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:25:54,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791742491] [2021-02-19 19:25:54,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:25:54,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:54,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:25:54,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:25:54,188 INFO L87 Difference]: Start difference. First operand 1591 states and 5437 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:55,659 INFO L93 Difference]: Finished difference Result 2267 states and 7551 transitions. [2021-02-19 19:25:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:25:55,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:55,662 INFO L225 Difference]: With dead ends: 2267 [2021-02-19 19:25:55,662 INFO L226 Difference]: Without dead ends: 2248 [2021-02-19 19:25:55,662 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:25:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-02-19 19:25:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1594. [2021-02-19 19:25:55,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.418706842435656) internal successors, (5446), 1593 states have internal predecessors, (5446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5446 transitions. [2021-02-19 19:25:55,683 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5446 transitions. Word has length 26 [2021-02-19 19:25:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:55,683 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5446 transitions. [2021-02-19 19:25:55,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5446 transitions. [2021-02-19 19:25:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:55,684 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:55,685 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:55,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:55,885 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 29 times [2021-02-19 19:25:55,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:55,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079165313] [2021-02-19 19:25:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:56,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079165313] [2021-02-19 19:25:56,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255210516] [2021-02-19 19:25:56,108 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 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 [2021-02-19 19:25:56,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:25:56,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:56,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:25:56,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:56,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:56,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:56,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:25:56,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:25:56,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:56,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:56,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-02-19 19:25:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:56,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:56,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:25:56,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278122260] [2021-02-19 19:25:56,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:25:56,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:56,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:25:56,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:25:56,441 INFO L87 Difference]: Start difference. First operand 1594 states and 5446 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:57,806 INFO L93 Difference]: Finished difference Result 2158 states and 7190 transitions. [2021-02-19 19:25:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:25:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:25:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:57,810 INFO L225 Difference]: With dead ends: 2158 [2021-02-19 19:25:57,811 INFO L226 Difference]: Without dead ends: 2133 [2021-02-19 19:25:57,811 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:25:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-02-19 19:25:57,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1588. [2021-02-19 19:25:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.420289855072464) internal successors, (5428), 1587 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5428 transitions. [2021-02-19 19:25:57,839 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5428 transitions. Word has length 26 [2021-02-19 19:25:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:57,839 INFO L480 AbstractCegarLoop]: Abstraction has 1588 states and 5428 transitions. [2021-02-19 19:25:57,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5428 transitions. [2021-02-19 19:25:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:25:57,841 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:57,841 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:58,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-02-19 19:25:58,042 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:58,042 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 48 times [2021-02-19 19:25:58,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:58,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276028489] [2021-02-19 19:25:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:58,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276028489] [2021-02-19 19:25:58,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200577693] [2021-02-19 19:25:58,432 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 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 [2021-02-19 19:25:58,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:25:58,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:58,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:25:58,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:58,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:25:58,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:58,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:25:58,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:25:58,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:58,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:58,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:58,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:25:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:58,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:58,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-02-19 19:25:58,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481309759] [2021-02-19 19:25:58,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:25:58,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:25:58,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:25:58,667 INFO L87 Difference]: Start difference. First operand 1588 states and 5428 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:00,250 INFO L93 Difference]: Finished difference Result 2065 states and 6822 transitions. [2021-02-19 19:26:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:26:00,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:00,254 INFO L225 Difference]: With dead ends: 2065 [2021-02-19 19:26:00,254 INFO L226 Difference]: Without dead ends: 2043 [2021-02-19 19:26:00,255 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:26:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-02-19 19:26:00,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1580. [2021-02-19 19:26:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-02-19 19:26:00,294 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-02-19 19:26:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:00,294 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-02-19 19:26:00,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-02-19 19:26:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:00,296 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:00,296 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:00,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-02-19 19:26:00,497 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-02-19 19:26:00,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:00,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481624895] [2021-02-19 19:26:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:00,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481624895] [2021-02-19 19:26:00,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150286029] [2021-02-19 19:26:00,918 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 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 [2021-02-19 19:26:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:00,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:26:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:01,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:01,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:26:01,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:26:01,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:26:01,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:01,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:01,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:01,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:26:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:01,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:01,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-02-19 19:26:01,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250734257] [2021-02-19 19:26:01,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:26:01,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:01,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:26:01,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:26:01,151 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:02,827 INFO L93 Difference]: Finished difference Result 2212 states and 7331 transitions. [2021-02-19 19:26:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:26:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:02,831 INFO L225 Difference]: With dead ends: 2212 [2021-02-19 19:26:02,831 INFO L226 Difference]: Without dead ends: 2197 [2021-02-19 19:26:02,831 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:26:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-02-19 19:26:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1580. [2021-02-19 19:26:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-02-19 19:26:02,850 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-02-19 19:26:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:02,850 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-02-19 19:26:02,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-02-19 19:26:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:02,852 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:02,852 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:03,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:03,062 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:03,062 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 50 times [2021-02-19 19:26:03,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:03,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028074552] [2021-02-19 19:26:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:03,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028074552] [2021-02-19 19:26:03,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678593498] [2021-02-19 19:26:03,390 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 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 [2021-02-19 19:26:03,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:26:03,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:03,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:26:03,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:03,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:03,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:03,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-02-19 19:26:03,686 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:26:03,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:03,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:03,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:23 [2021-02-19 19:26:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:03,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:03,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-02-19 19:26:03,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787803063] [2021-02-19 19:26:03,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:26:03,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:03,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:26:03,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:26:03,813 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:04,939 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-02-19 19:26:05,675 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-02-19 19:26:07,635 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-02-19 19:26:07,798 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 19:26:10,496 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-02-19 19:26:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:10,567 INFO L93 Difference]: Finished difference Result 3072 states and 9807 transitions. [2021-02-19 19:26:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 19:26:10,568 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:10,573 INFO L225 Difference]: With dead ends: 3072 [2021-02-19 19:26:10,573 INFO L226 Difference]: Without dead ends: 3010 [2021-02-19 19:26:10,574 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1034, Invalid=6448, Unknown=0, NotChecked=0, Total=7482 [2021-02-19 19:26:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2021-02-19 19:26:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 1662. [2021-02-19 19:26:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4166164960866947) internal successors, (5675), 1661 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5675 transitions. [2021-02-19 19:26:10,609 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5675 transitions. Word has length 26 [2021-02-19 19:26:10,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:10,609 INFO L480 AbstractCegarLoop]: Abstraction has 1662 states and 5675 transitions. [2021-02-19 19:26:10,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5675 transitions. [2021-02-19 19:26:10,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:10,612 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:10,612 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:10,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:10,813 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-02-19 19:26:10,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:10,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465411557] [2021-02-19 19:26:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:11,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465411557] [2021-02-19 19:26:11,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007166818] [2021-02-19 19:26:11,217 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 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 [2021-02-19 19:26:11,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:26:11,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:26:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:11,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:11,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 85 [2021-02-19 19:26:11,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:12,080 WARN L202 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-02-19 19:26:12,081 INFO L628 ElimStorePlain]: treesize reduction 210, result has 44.6 percent of original size [2021-02-19 19:26:12,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:12,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:77, output treesize:1113 [2021-02-19 19:26:13,063 WARN L202 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2021-02-19 19:26:13,448 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-02-19 19:26:13,686 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 19:26:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:13,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:13,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-02-19 19:26:13,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107822557] [2021-02-19 19:26:13,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:26:13,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:13,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:26:13,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:26:13,741 INFO L87 Difference]: Start difference. First operand 1662 states and 5675 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:14,105 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 35 [2021-02-19 19:26:15,076 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 44 [2021-02-19 19:26:15,230 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-02-19 19:26:15,918 WARN L202 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2021-02-19 19:26:16,717 WARN L202 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 54 [2021-02-19 19:26:17,016 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 38 [2021-02-19 19:26:17,688 WARN L202 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 55 [2021-02-19 19:26:17,873 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 28 [2021-02-19 19:26:19,114 WARN L202 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-02-19 19:26:19,846 WARN L202 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2021-02-19 19:26:20,499 WARN L202 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 63 [2021-02-19 19:26:20,793 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 49 [2021-02-19 19:26:21,284 WARN L202 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 52 [2021-02-19 19:26:22,038 WARN L202 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 66 [2021-02-19 19:26:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:22,143 INFO L93 Difference]: Finished difference Result 2685 states and 8801 transitions. [2021-02-19 19:26:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:26:22,144 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:22,149 INFO L225 Difference]: With dead ends: 2685 [2021-02-19 19:26:22,149 INFO L226 Difference]: Without dead ends: 2655 [2021-02-19 19:26:22,149 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 19:26:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-02-19 19:26:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1663. [2021-02-19 19:26:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.418170878459687) internal successors, (5681), 1662 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5681 transitions. [2021-02-19 19:26:22,184 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5681 transitions. Word has length 26 [2021-02-19 19:26:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:22,184 INFO L480 AbstractCegarLoop]: Abstraction has 1663 states and 5681 transitions. [2021-02-19 19:26:22,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5681 transitions. [2021-02-19 19:26:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:22,187 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:22,187 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:22,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:22,398 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-02-19 19:26:22,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:22,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931848321] [2021-02-19 19:26:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:22,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931848321] [2021-02-19 19:26:22,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018832403] [2021-02-19 19:26:22,842 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 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 [2021-02-19 19:26:22,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:26:22,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:22,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:26:22,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:23,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:26:23,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:26:23,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:26:23,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:23,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:23,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:23,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:26:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:23,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:23,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-02-19 19:26:23,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921016441] [2021-02-19 19:26:23,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:26:23,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:23,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:26:23,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:26:23,131 INFO L87 Difference]: Start difference. First operand 1663 states and 5681 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:24,026 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2021-02-19 19:26:24,486 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 19:26:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:25,058 INFO L93 Difference]: Finished difference Result 2164 states and 7165 transitions. [2021-02-19 19:26:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:26:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:25,063 INFO L225 Difference]: With dead ends: 2164 [2021-02-19 19:26:25,063 INFO L226 Difference]: Without dead ends: 2149 [2021-02-19 19:26:25,063 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:26:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-02-19 19:26:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1667. [2021-02-19 19:26:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.4183673469387754) internal successors, (5695), 1666 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5695 transitions. [2021-02-19 19:26:25,092 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5695 transitions. Word has length 26 [2021-02-19 19:26:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:25,092 INFO L480 AbstractCegarLoop]: Abstraction has 1667 states and 5695 transitions. [2021-02-19 19:26:25,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5695 transitions. [2021-02-19 19:26:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:25,095 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:25,095 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:25,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-02-19 19:26:25,295 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:25,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:25,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-02-19 19:26:25,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:25,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001213695] [2021-02-19 19:26:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:25,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001213695] [2021-02-19 19:26:25,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531287239] [2021-02-19 19:26:25,723 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 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 [2021-02-19 19:26:25,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:26:25,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:25,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:26:25,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:25,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:25,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:25,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:25,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-02-19 19:26:25,979 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:26:26,009 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-02-19 19:26:26,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:26,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-02-19 19:26:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:26,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:26,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-02-19 19:26:26,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847504426] [2021-02-19 19:26:26,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:26:26,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:26,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:26:26,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:26:26,088 INFO L87 Difference]: Start difference. First operand 1667 states and 5695 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-02-19 19:26:27,350 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-02-19 19:26:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:28,030 INFO L93 Difference]: Finished difference Result 2569 states and 8461 transitions. [2021-02-19 19:26:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:26:28,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 26 [2021-02-19 19:26:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:28,036 INFO L225 Difference]: With dead ends: 2569 [2021-02-19 19:26:28,036 INFO L226 Difference]: Without dead ends: 2524 [2021-02-19 19:26:28,036 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:26:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-02-19 19:26:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1667. [2021-02-19 19:26:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.4183673469387754) internal successors, (5695), 1666 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5695 transitions. [2021-02-19 19:26:28,068 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5695 transitions. Word has length 26 [2021-02-19 19:26:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:28,068 INFO L480 AbstractCegarLoop]: Abstraction has 1667 states and 5695 transitions. [2021-02-19 19:26:28,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-02-19 19:26:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5695 transitions. [2021-02-19 19:26:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:28,071 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:28,071 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:28,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-02-19 19:26:28,271 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:28,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1432133845, now seen corresponding path program 54 times [2021-02-19 19:26:28,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:28,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950361918] [2021-02-19 19:26:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:28,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950361918] [2021-02-19 19:26:28,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986988301] [2021-02-19 19:26:28,615 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 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 [2021-02-19 19:26:28,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:26:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:28,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:26:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:28,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:28,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:28,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:28,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:28,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-02-19 19:26:28,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 19:26:28,899 INFO L628 ElimStorePlain]: treesize reduction 34, result has 34.6 percent of original size [2021-02-19 19:26:28,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:28,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-02-19 19:26:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:28,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:28,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-02-19 19:26:28,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150613685] [2021-02-19 19:26:28,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:26:28,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:28,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:26:28,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:26:28,971 INFO L87 Difference]: Start difference. First operand 1667 states and 5695 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-02-19 19:26:29,799 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-02-19 19:26:30,400 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-02-19 19:26:30,527 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-02-19 19:26:32,939 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-02-19 19:26:33,492 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-02-19 19:26:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:34,939 INFO L93 Difference]: Finished difference Result 3399 states and 10748 transitions. [2021-02-19 19:26:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 19:26:34,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:34,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:34,947 INFO L225 Difference]: With dead ends: 3399 [2021-02-19 19:26:34,947 INFO L226 Difference]: Without dead ends: 3352 [2021-02-19 19:26:34,947 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=884, Invalid=4372, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 19:26:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-02-19 19:26:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 1696. [2021-02-19 19:26:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 3.4289085545722715) internal successors, (5812), 1695 states have internal predecessors, (5812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 5812 transitions. [2021-02-19 19:26:34,985 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 5812 transitions. Word has length 26 [2021-02-19 19:26:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:34,985 INFO L480 AbstractCegarLoop]: Abstraction has 1696 states and 5812 transitions. [2021-02-19 19:26:34,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-02-19 19:26:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 5812 transitions. [2021-02-19 19:26:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:34,988 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:34,988 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:35,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:35,188 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash 266862281, now seen corresponding path program 30 times [2021-02-19 19:26:35,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:35,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056039695] [2021-02-19 19:26:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:35,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056039695] [2021-02-19 19:26:35,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383526230] [2021-02-19 19:26:35,421 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 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 [2021-02-19 19:26:35,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:26:35,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:35,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:26:35,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:35,801 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-02-19 19:26:35,801 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 48 [2021-02-19 19:26:35,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:35,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:35,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:35,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:17 [2021-02-19 19:26:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:35,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:35,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:26:35,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924755301] [2021-02-19 19:26:35,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:26:35,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:35,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:26:35,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:26:35,888 INFO L87 Difference]: Start difference. First operand 1696 states and 5812 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:37,995 INFO L93 Difference]: Finished difference Result 2215 states and 7336 transitions. [2021-02-19 19:26:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:26:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:37,999 INFO L225 Difference]: With dead ends: 2215 [2021-02-19 19:26:37,999 INFO L226 Difference]: Without dead ends: 2200 [2021-02-19 19:26:37,999 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:26:38,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-02-19 19:26:38,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1684. [2021-02-19 19:26:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4313725490196076) internal successors, (5775), 1683 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5775 transitions. [2021-02-19 19:26:38,034 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5775 transitions. Word has length 26 [2021-02-19 19:26:38,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:38,034 INFO L480 AbstractCegarLoop]: Abstraction has 1684 states and 5775 transitions. [2021-02-19 19:26:38,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5775 transitions. [2021-02-19 19:26:38,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:38,037 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:38,037 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:38,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-02-19 19:26:38,237 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:38,238 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 31 times [2021-02-19 19:26:38,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:38,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935830871] [2021-02-19 19:26:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:38,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935830871] [2021-02-19 19:26:38,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919668899] [2021-02-19 19:26:38,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:26:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:38,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:26:38,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:38,664 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-02-19 19:26:38,665 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 66 treesize of output 49 [2021-02-19 19:26:38,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:38,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:38,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:38,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-02-19 19:26:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:38,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:38,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:26:38,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321101650] [2021-02-19 19:26:38,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:26:38,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:38,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:26:38,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:26:38,706 INFO L87 Difference]: Start difference. First operand 1684 states and 5775 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:39,060 INFO L93 Difference]: Finished difference Result 1997 states and 6733 transitions. [2021-02-19 19:26:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 19:26:39,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:39,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:39,063 INFO L225 Difference]: With dead ends: 1997 [2021-02-19 19:26:39,063 INFO L226 Difference]: Without dead ends: 1982 [2021-02-19 19:26:39,063 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:26:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2021-02-19 19:26:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1678. [2021-02-19 19:26:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.4311270125223614) internal successors, (5754), 1677 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 5754 transitions. [2021-02-19 19:26:39,084 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 5754 transitions. Word has length 26 [2021-02-19 19:26:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:39,085 INFO L480 AbstractCegarLoop]: Abstraction has 1678 states and 5754 transitions. [2021-02-19 19:26:39,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 5754 transitions. [2021-02-19 19:26:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:39,087 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:39,087 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:39,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:39,287 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:39,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1883002471, now seen corresponding path program 32 times [2021-02-19 19:26:39,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:39,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100960780] [2021-02-19 19:26:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:39,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100960780] [2021-02-19 19:26:39,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56695953] [2021-02-19 19:26:39,481 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:39,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:26:39,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:26:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:39,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:39,696 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-02-19 19:26:39,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 59 [2021-02-19 19:26:39,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:39,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:39,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:39,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:86, output treesize:27 [2021-02-19 19:26:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:39,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:39,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-02-19 19:26:39,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30235348] [2021-02-19 19:26:39,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:26:39,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:39,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:26:39,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:26:39,824 INFO L87 Difference]: Start difference. First operand 1678 states and 5754 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:41,470 INFO L93 Difference]: Finished difference Result 2850 states and 9282 transitions. [2021-02-19 19:26:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:26:41,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:41,475 INFO L225 Difference]: With dead ends: 2850 [2021-02-19 19:26:41,476 INFO L226 Difference]: Without dead ends: 2799 [2021-02-19 19:26:41,476 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:26:41,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-02-19 19:26:41,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1708. [2021-02-19 19:26:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.440538957234915) internal successors, (5873), 1707 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5873 transitions. [2021-02-19 19:26:41,501 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5873 transitions. Word has length 26 [2021-02-19 19:26:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:41,501 INFO L480 AbstractCegarLoop]: Abstraction has 1708 states and 5873 transitions. [2021-02-19 19:26:41,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5873 transitions. [2021-02-19 19:26:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:41,503 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:41,503 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:41,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:41,706 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash -714132561, now seen corresponding path program 33 times [2021-02-19 19:26:41,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:41,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266195091] [2021-02-19 19:26:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:41,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266195091] [2021-02-19 19:26:41,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659746572] [2021-02-19 19:26:41,878 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 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 [2021-02-19 19:26:41,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:26:41,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:41,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:26:41,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:42,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:42,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:26:42,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:26:42,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:42,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:42,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:42,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-02-19 19:26:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:42,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:42,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:26:42,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220798592] [2021-02-19 19:26:42,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:26:42,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:42,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:26:42,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:26:42,265 INFO L87 Difference]: Start difference. First operand 1708 states and 5873 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:42,867 INFO L93 Difference]: Finished difference Result 2136 states and 7161 transitions. [2021-02-19 19:26:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:26:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:42,872 INFO L225 Difference]: With dead ends: 2136 [2021-02-19 19:26:42,872 INFO L226 Difference]: Without dead ends: 2115 [2021-02-19 19:26:42,872 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:26:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-02-19 19:26:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1708. [2021-02-19 19:26:42,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.440538957234915) internal successors, (5873), 1707 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5873 transitions. [2021-02-19 19:26:42,900 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5873 transitions. Word has length 26 [2021-02-19 19:26:42,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:42,900 INFO L480 AbstractCegarLoop]: Abstraction has 1708 states and 5873 transitions. [2021-02-19 19:26:42,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:42,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5873 transitions. [2021-02-19 19:26:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:42,903 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:42,903 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:43,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:43,104 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:43,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2094376111, now seen corresponding path program 34 times [2021-02-19 19:26:43,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:43,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491722087] [2021-02-19 19:26:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:43,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491722087] [2021-02-19 19:26:43,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617444233] [2021-02-19 19:26:43,310 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 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 [2021-02-19 19:26:43,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:26:43,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:43,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:26:43,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:43,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:43,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:26:43,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:26:43,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:43,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:43,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:43,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:26:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:43,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:43,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:26:43,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631597506] [2021-02-19 19:26:43,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:26:43,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:43,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:26:43,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:26:43,613 INFO L87 Difference]: Start difference. First operand 1708 states and 5873 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:43,972 INFO L93 Difference]: Finished difference Result 2026 states and 6819 transitions. [2021-02-19 19:26:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 19:26:43,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:43,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:43,975 INFO L225 Difference]: With dead ends: 2026 [2021-02-19 19:26:43,975 INFO L226 Difference]: Without dead ends: 2007 [2021-02-19 19:26:43,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:26:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-02-19 19:26:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1702. [2021-02-19 19:26:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 3.4403292181069958) internal successors, (5852), 1701 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 5852 transitions. [2021-02-19 19:26:43,994 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 5852 transitions. Word has length 26 [2021-02-19 19:26:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:43,994 INFO L480 AbstractCegarLoop]: Abstraction has 1702 states and 5852 transitions. [2021-02-19 19:26:43,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 5852 transitions. [2021-02-19 19:26:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:43,996 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:43,996 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:44,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:44,197 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:44,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:44,197 INFO L82 PathProgramCache]: Analyzing trace with hash -901909679, now seen corresponding path program 35 times [2021-02-19 19:26:44,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:44,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442354450] [2021-02-19 19:26:44,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:44,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442354450] [2021-02-19 19:26:44,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40048156] [2021-02-19 19:26:44,372 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 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 [2021-02-19 19:26:44,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:26:44,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:44,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:26:44,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:44,569 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-02-19 19:26:44,569 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 68 treesize of output 64 [2021-02-19 19:26:44,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:44,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:44,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:44,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:91 [2021-02-19 19:26:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:44,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:44,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 19:26:44,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796952645] [2021-02-19 19:26:44,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:26:44,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:44,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:26:44,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:26:44,725 INFO L87 Difference]: Start difference. First operand 1702 states and 5852 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:47,158 INFO L93 Difference]: Finished difference Result 2627 states and 8469 transitions. [2021-02-19 19:26:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:26:47,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:47,164 INFO L225 Difference]: With dead ends: 2627 [2021-02-19 19:26:47,164 INFO L226 Difference]: Without dead ends: 2577 [2021-02-19 19:26:47,165 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:26:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-02-19 19:26:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 1696. [2021-02-19 19:26:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 3.4348082595870206) internal successors, (5822), 1695 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 5822 transitions. [2021-02-19 19:26:47,193 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 5822 transitions. Word has length 26 [2021-02-19 19:26:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:47,193 INFO L480 AbstractCegarLoop]: Abstraction has 1696 states and 5822 transitions. [2021-02-19 19:26:47,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 5822 transitions. [2021-02-19 19:26:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:47,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:47,196 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:47,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:47,396 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:47,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:47,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1564124331, now seen corresponding path program 36 times [2021-02-19 19:26:47,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:47,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888514305] [2021-02-19 19:26:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:47,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888514305] [2021-02-19 19:26:47,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436698083] [2021-02-19 19:26:47,611 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 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 [2021-02-19 19:26:47,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:26:47,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:47,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:26:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:47,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:47,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:26:47,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:26:47,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:47,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:47,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:47,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:26:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:47,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:47,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:26:47,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854818869] [2021-02-19 19:26:47,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:26:47,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:47,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:26:47,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:26:47,939 INFO L87 Difference]: Start difference. First operand 1696 states and 5822 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:48,148 INFO L93 Difference]: Finished difference Result 1771 states and 5987 transitions. [2021-02-19 19:26:48,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:26:48,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:48,151 INFO L225 Difference]: With dead ends: 1771 [2021-02-19 19:26:48,151 INFO L226 Difference]: Without dead ends: 1752 [2021-02-19 19:26:48,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:26:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-02-19 19:26:48,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1688. [2021-02-19 19:26:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.4333135743924124) internal successors, (5792), 1687 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5792 transitions. [2021-02-19 19:26:48,169 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5792 transitions. Word has length 26 [2021-02-19 19:26:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:48,169 INFO L480 AbstractCegarLoop]: Abstraction has 1688 states and 5792 transitions. [2021-02-19 19:26:48,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5792 transitions. [2021-02-19 19:26:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:48,171 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:48,171 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:48,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:48,386 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:48,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:48,386 INFO L82 PathProgramCache]: Analyzing trace with hash -583168205, now seen corresponding path program 37 times [2021-02-19 19:26:48,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:48,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621185823] [2021-02-19 19:26:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:48,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621185823] [2021-02-19 19:26:48,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890472887] [2021-02-19 19:26:48,570 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 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 [2021-02-19 19:26:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:48,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:26:48,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:48,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:48,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:26:48,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:26:48,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:48,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:48,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:48,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:26:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:48,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:48,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:26:48,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775158656] [2021-02-19 19:26:48,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:26:48,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:48,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:26:48,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:26:48,831 INFO L87 Difference]: Start difference. First operand 1688 states and 5792 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:49,079 INFO L93 Difference]: Finished difference Result 1819 states and 6151 transitions. [2021-02-19 19:26:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:26:49,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:49,083 INFO L225 Difference]: With dead ends: 1819 [2021-02-19 19:26:49,083 INFO L226 Difference]: Without dead ends: 1804 [2021-02-19 19:26:49,083 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:26:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-02-19 19:26:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1676. [2021-02-19 19:26:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.44) internal successors, (5762), 1675 states have internal predecessors, (5762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5762 transitions. [2021-02-19 19:26:49,108 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5762 transitions. Word has length 26 [2021-02-19 19:26:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:49,109 INFO L480 AbstractCegarLoop]: Abstraction has 1676 states and 5762 transitions. [2021-02-19 19:26:49,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:49,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5762 transitions. [2021-02-19 19:26:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:49,111 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:49,111 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:49,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:49,311 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:49,311 INFO L82 PathProgramCache]: Analyzing trace with hash 987657395, now seen corresponding path program 38 times [2021-02-19 19:26:49,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:49,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128013420] [2021-02-19 19:26:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:49,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128013420] [2021-02-19 19:26:49,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664049911] [2021-02-19 19:26:49,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:26:49,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:26:49,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:26:49,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:49,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:49,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:49,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:26:49,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:26:49,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:49,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:49,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-02-19 19:26:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:49,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:49,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:26:49,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748196412] [2021-02-19 19:26:49,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:26:49,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:49,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:26:49,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:26:49,720 INFO L87 Difference]: Start difference. First operand 1676 states and 5762 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:50,520 INFO L93 Difference]: Finished difference Result 2401 states and 7933 transitions. [2021-02-19 19:26:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:26:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:50,524 INFO L225 Difference]: With dead ends: 2401 [2021-02-19 19:26:50,524 INFO L226 Difference]: Without dead ends: 2355 [2021-02-19 19:26:50,525 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:26:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-02-19 19:26:50,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1683. [2021-02-19 19:26:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.4387633769322234) internal successors, (5784), 1682 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5784 transitions. [2021-02-19 19:26:50,546 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5784 transitions. Word has length 26 [2021-02-19 19:26:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:50,546 INFO L480 AbstractCegarLoop]: Abstraction has 1683 states and 5784 transitions. [2021-02-19 19:26:50,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:50,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5784 transitions. [2021-02-19 19:26:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:50,548 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:50,548 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:50,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:50,749 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:50,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1560231399, now seen corresponding path program 39 times [2021-02-19 19:26:50,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:50,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700670622] [2021-02-19 19:26:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:50,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700670622] [2021-02-19 19:26:50,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491847613] [2021-02-19 19:26:50,905 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 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 [2021-02-19 19:26:50,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:26:50,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:26:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:51,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:51,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-02-19 19:26:51,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:51,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:51,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:26:51,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-02-19 19:26:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:51,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:51,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:26:51,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089178368] [2021-02-19 19:26:51,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:26:51,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:51,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:26:51,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:26:51,217 INFO L87 Difference]: Start difference. First operand 1683 states and 5784 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-02-19 19:26:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:51,985 INFO L93 Difference]: Finished difference Result 2469 states and 8187 transitions. [2021-02-19 19:26:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:26:51,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:51,989 INFO L225 Difference]: With dead ends: 2469 [2021-02-19 19:26:51,989 INFO L226 Difference]: Without dead ends: 2450 [2021-02-19 19:26:51,989 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:26:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-02-19 19:26:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 1686. [2021-02-19 19:26:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.435608308605341) internal successors, (5789), 1685 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5789 transitions. [2021-02-19 19:26:52,014 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5789 transitions. Word has length 26 [2021-02-19 19:26:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:52,014 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 5789 transitions. [2021-02-19 19:26:52,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-02-19 19:26:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5789 transitions. [2021-02-19 19:26:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:52,016 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:52,016 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:52,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:52,216 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:52,217 INFO L82 PathProgramCache]: Analyzing trace with hash -129711505, now seen corresponding path program 40 times [2021-02-19 19:26:52,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:52,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166921018] [2021-02-19 19:26:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:52,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166921018] [2021-02-19 19:26:52,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042292398] [2021-02-19 19:26:52,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:26:52,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:26:52,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:26:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:52,731 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-02-19 19:26:52,731 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 66 treesize of output 54 [2021-02-19 19:26:52,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:52,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:52,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:52,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-02-19 19:26:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:52,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:52,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:26:52,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721724700] [2021-02-19 19:26:52,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:26:52,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:52,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:26:52,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:26:52,835 INFO L87 Difference]: Start difference. First operand 1686 states and 5789 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-02-19 19:26:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:53,700 INFO L93 Difference]: Finished difference Result 2245 states and 7512 transitions. [2021-02-19 19:26:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 19:26:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:53,705 INFO L225 Difference]: With dead ends: 2245 [2021-02-19 19:26:53,705 INFO L226 Difference]: Without dead ends: 2220 [2021-02-19 19:26:53,705 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:26:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-02-19 19:26:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1674. [2021-02-19 19:26:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.43335325762104) internal successors, (5744), 1673 states have internal predecessors, (5744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5744 transitions. [2021-02-19 19:26:53,725 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5744 transitions. Word has length 26 [2021-02-19 19:26:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:53,725 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 5744 transitions. [2021-02-19 19:26:53,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-02-19 19:26:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5744 transitions. [2021-02-19 19:26:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:53,734 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:53,734 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:53,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:53,950 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:53,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:53,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1425753961, now seen corresponding path program 41 times [2021-02-19 19:26:53,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:53,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678031433] [2021-02-19 19:26:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:54,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678031433] [2021-02-19 19:26:54,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128127736] [2021-02-19 19:26:54,173 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 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 [2021-02-19 19:26:54,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:26:54,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:54,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:26:54,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:54,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:54,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:26:54,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 19:26:54,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:54,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:54,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:54,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-02-19 19:26:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:54,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:54,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:26:54,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844842984] [2021-02-19 19:26:54,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:26:54,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:54,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:26:54,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:26:54,619 INFO L87 Difference]: Start difference. First operand 1674 states and 5744 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:55,282 INFO L93 Difference]: Finished difference Result 2132 states and 7148 transitions. [2021-02-19 19:26:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:26:55,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:55,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:55,286 INFO L225 Difference]: With dead ends: 2132 [2021-02-19 19:26:55,286 INFO L226 Difference]: Without dead ends: 2117 [2021-02-19 19:26:55,286 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:26:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-02-19 19:26:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1663. [2021-02-19 19:26:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.4338146811071) internal successors, (5707), 1662 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5707 transitions. [2021-02-19 19:26:55,306 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5707 transitions. Word has length 26 [2021-02-19 19:26:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:55,306 INFO L480 AbstractCegarLoop]: Abstraction has 1663 states and 5707 transitions. [2021-02-19 19:26:55,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5707 transitions. [2021-02-19 19:26:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:55,308 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:55,308 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:55,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:55,512 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 42 times [2021-02-19 19:26:55,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:55,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41906667] [2021-02-19 19:26:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:55,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41906667] [2021-02-19 19:26:55,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218490] [2021-02-19 19:26:55,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:26:55,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:26:55,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:55,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:26:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:55,911 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-02-19 19:26:55,911 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 84 treesize of output 68 [2021-02-19 19:26:55,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:55,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:55,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:55,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:84, output treesize:25 [2021-02-19 19:26:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:55,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:55,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:26:55,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573851567] [2021-02-19 19:26:55,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:26:55,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:55,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:26:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:26:55,992 INFO L87 Difference]: Start difference. First operand 1663 states and 5707 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:57,107 INFO L93 Difference]: Finished difference Result 2310 states and 7644 transitions. [2021-02-19 19:26:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:26:57,108 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:57,112 INFO L225 Difference]: With dead ends: 2310 [2021-02-19 19:26:57,112 INFO L226 Difference]: Without dead ends: 2280 [2021-02-19 19:26:57,113 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:26:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-02-19 19:26:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1714. [2021-02-19 19:26:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.4279042615294806) internal successors, (5872), 1713 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5872 transitions. [2021-02-19 19:26:57,142 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5872 transitions. Word has length 26 [2021-02-19 19:26:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:57,142 INFO L480 AbstractCegarLoop]: Abstraction has 1714 states and 5872 transitions. [2021-02-19 19:26:57,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5872 transitions. [2021-02-19 19:26:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:57,145 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:57,145 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:57,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-02-19 19:26:57,346 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:57,346 INFO L82 PathProgramCache]: Analyzing trace with hash 987336491, now seen corresponding path program 43 times [2021-02-19 19:26:57,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:57,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66899108] [2021-02-19 19:26:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:57,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66899108] [2021-02-19 19:26:57,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000976555] [2021-02-19 19:26:57,512 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 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 [2021-02-19 19:26:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:57,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:26:57,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:57,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:57,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:57,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:26:57,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:26:57,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:57,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:57,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-02-19 19:26:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:57,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:57,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:26:57,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300788110] [2021-02-19 19:26:57,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:26:57,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:57,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:26:57,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:26:57,863 INFO L87 Difference]: Start difference. First operand 1714 states and 5872 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-02-19 19:26:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:58,757 INFO L93 Difference]: Finished difference Result 2419 states and 8063 transitions. [2021-02-19 19:26:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:26:58,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:26:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:58,763 INFO L225 Difference]: With dead ends: 2419 [2021-02-19 19:26:58,763 INFO L226 Difference]: Without dead ends: 2404 [2021-02-19 19:26:58,763 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:26:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-02-19 19:26:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1708. [2021-02-19 19:26:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.427650849443468) internal successors, (5851), 1707 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5851 transitions. [2021-02-19 19:26:58,795 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5851 transitions. Word has length 26 [2021-02-19 19:26:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:58,795 INFO L480 AbstractCegarLoop]: Abstraction has 1708 states and 5851 transitions. [2021-02-19 19:26:58,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-02-19 19:26:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5851 transitions. [2021-02-19 19:26:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:26:58,798 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:58,798 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:58,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-02-19 19:26:58,999 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:58,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:58,999 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 44 times [2021-02-19 19:26:58,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:58,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125182828] [2021-02-19 19:26:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:59,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125182828] [2021-02-19 19:26:59,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863776003] [2021-02-19 19:26:59,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:26:59,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:26:59,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:59,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:26:59,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:59,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:26:59,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:59,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-02-19 19:26:59,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:59,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:59,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:26:59,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-02-19 19:26:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:59,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:59,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:26:59,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527044673] [2021-02-19 19:26:59,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:26:59,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:59,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:26:59,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:26:59,686 INFO L87 Difference]: Start difference. First operand 1708 states and 5851 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:00,311 INFO L93 Difference]: Finished difference Result 2221 states and 7458 transitions. [2021-02-19 19:27:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:27:00,312 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:00,315 INFO L225 Difference]: With dead ends: 2221 [2021-02-19 19:27:00,315 INFO L226 Difference]: Without dead ends: 2206 [2021-02-19 19:27:00,315 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:27:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2021-02-19 19:27:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 1711. [2021-02-19 19:27:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.4309941520467837) internal successors, (5867), 1710 states have internal predecessors, (5867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 5867 transitions. [2021-02-19 19:27:00,337 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 5867 transitions. Word has length 26 [2021-02-19 19:27:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:00,337 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 5867 transitions. [2021-02-19 19:27:00,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:00,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 5867 transitions. [2021-02-19 19:27:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:00,339 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:00,339 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:00,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:00,540 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:00,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 45 times [2021-02-19 19:27:00,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:00,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057693056] [2021-02-19 19:27:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:00,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057693056] [2021-02-19 19:27:00,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43444790] [2021-02-19 19:27:00,677 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 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 [2021-02-19 19:27:00,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:27:00,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:00,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:27:00,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:00,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:00,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:00,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-02-19 19:27:00,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:27:00,915 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.3 percent of original size [2021-02-19 19:27:00,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:27:00,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:77 [2021-02-19 19:27:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:01,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:01,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 19:27:01,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322272820] [2021-02-19 19:27:01,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:27:01,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:01,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:27:01,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:27:01,043 INFO L87 Difference]: Start difference. First operand 1711 states and 5867 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:01,491 INFO L93 Difference]: Finished difference Result 2251 states and 7554 transitions. [2021-02-19 19:27:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:27:01,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:01,494 INFO L225 Difference]: With dead ends: 2251 [2021-02-19 19:27:01,494 INFO L226 Difference]: Without dead ends: 2236 [2021-02-19 19:27:01,495 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:27:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-02-19 19:27:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1729. [2021-02-19 19:27:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 3.4265046296296298) internal successors, (5921), 1728 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 5921 transitions. [2021-02-19 19:27:01,517 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 5921 transitions. Word has length 26 [2021-02-19 19:27:01,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:01,517 INFO L480 AbstractCegarLoop]: Abstraction has 1729 states and 5921 transitions. [2021-02-19 19:27:01,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 5921 transitions. [2021-02-19 19:27:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:01,519 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:01,519 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:01,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-02-19 19:27:01,720 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:01,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 46 times [2021-02-19 19:27:01,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:01,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982097481] [2021-02-19 19:27:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:01,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982097481] [2021-02-19 19:27:01,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409233350] [2021-02-19 19:27:01,937 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 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 [2021-02-19 19:27:01,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:27:01,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:01,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:27:01,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:02,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:02,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:02,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:02,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-02-19 19:27:02,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:27:02,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:02,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:02,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-02-19 19:27:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:02,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:02,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:27:02,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135647340] [2021-02-19 19:27:02,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:27:02,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:02,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:27:02,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:27:02,333 INFO L87 Difference]: Start difference. First operand 1729 states and 5921 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:03,956 INFO L93 Difference]: Finished difference Result 2264 states and 7600 transitions. [2021-02-19 19:27:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:27:03,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:03,961 INFO L225 Difference]: With dead ends: 2264 [2021-02-19 19:27:03,961 INFO L226 Difference]: Without dead ends: 2249 [2021-02-19 19:27:03,962 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:27:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-02-19 19:27:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1747. [2021-02-19 19:27:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.4238258877434133) internal successors, (5978), 1746 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 5978 transitions. [2021-02-19 19:27:03,992 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 5978 transitions. Word has length 26 [2021-02-19 19:27:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:03,992 INFO L480 AbstractCegarLoop]: Abstraction has 1747 states and 5978 transitions. [2021-02-19 19:27:03,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 5978 transitions. [2021-02-19 19:27:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:03,994 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:03,994 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:04,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:04,195 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:04,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 47 times [2021-02-19 19:27:04,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:04,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687370543] [2021-02-19 19:27:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:04,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687370543] [2021-02-19 19:27:04,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306158470] [2021-02-19 19:27:04,395 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 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 [2021-02-19 19:27:04,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:27:04,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:04,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:27:04,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:04,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:04,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:04,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-02-19 19:27:04,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:04,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:04,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:27:04,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:75 [2021-02-19 19:27:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:04,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:04,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:27:04,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581758840] [2021-02-19 19:27:04,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:27:04,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:04,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:27:04,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:27:04,834 INFO L87 Difference]: Start difference. First operand 1747 states and 5978 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:05,514 INFO L93 Difference]: Finished difference Result 2317 states and 7745 transitions. [2021-02-19 19:27:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 19:27:05,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:05,521 INFO L225 Difference]: With dead ends: 2317 [2021-02-19 19:27:05,521 INFO L226 Difference]: Without dead ends: 2292 [2021-02-19 19:27:05,521 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:27:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-02-19 19:27:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 1748. [2021-02-19 19:27:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.427017744705209) internal successors, (5987), 1747 states have internal predecessors, (5987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5987 transitions. [2021-02-19 19:27:05,554 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5987 transitions. Word has length 26 [2021-02-19 19:27:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:05,554 INFO L480 AbstractCegarLoop]: Abstraction has 1748 states and 5987 transitions. [2021-02-19 19:27:05,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5987 transitions. [2021-02-19 19:27:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:05,557 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:05,557 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:05,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:05,759 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:05,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:05,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 48 times [2021-02-19 19:27:05,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:05,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091160342] [2021-02-19 19:27:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:06,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091160342] [2021-02-19 19:27:06,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724760555] [2021-02-19 19:27:06,053 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 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 [2021-02-19 19:27:06,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:27:06,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:06,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:27:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:06,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:06,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:06,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:27:06,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:27:06,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:06,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:06,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-02-19 19:27:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:06,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:06,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:27:06,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436055200] [2021-02-19 19:27:06,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:27:06,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:06,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:27:06,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:27:06,525 INFO L87 Difference]: Start difference. First operand 1748 states and 5987 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:08,101 INFO L93 Difference]: Finished difference Result 2380 states and 7936 transitions. [2021-02-19 19:27:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:27:08,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:08,107 INFO L225 Difference]: With dead ends: 2380 [2021-02-19 19:27:08,107 INFO L226 Difference]: Without dead ends: 2344 [2021-02-19 19:27:08,107 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:27:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-02-19 19:27:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 1766. [2021-02-19 19:27:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 3.4294617563739376) internal successors, (6053), 1765 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 6053 transitions. [2021-02-19 19:27:08,139 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 6053 transitions. Word has length 26 [2021-02-19 19:27:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:08,139 INFO L480 AbstractCegarLoop]: Abstraction has 1766 states and 6053 transitions. [2021-02-19 19:27:08,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 6053 transitions. [2021-02-19 19:27:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:08,142 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:08,142 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:08,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-02-19 19:27:08,342 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:08,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1743994595, now seen corresponding path program 55 times [2021-02-19 19:27:08,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:08,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949047241] [2021-02-19 19:27:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:08,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949047241] [2021-02-19 19:27:08,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018087402] [2021-02-19 19:27:08,797 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 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 [2021-02-19 19:27:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:08,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:27:08,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:09,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:09,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:27:09,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:27:09,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:27:09,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:09,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:09,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:09,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:27:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:09,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:09,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-02-19 19:27:09,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892777937] [2021-02-19 19:27:09,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:27:09,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:27:09,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:27:09,084 INFO L87 Difference]: Start difference. First operand 1766 states and 6053 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:09,947 INFO L93 Difference]: Finished difference Result 2205 states and 7362 transitions. [2021-02-19 19:27:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:27:09,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:09,953 INFO L225 Difference]: With dead ends: 2205 [2021-02-19 19:27:09,953 INFO L226 Difference]: Without dead ends: 2179 [2021-02-19 19:27:09,953 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:27:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2021-02-19 19:27:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1762. [2021-02-19 19:27:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4281658148779104) internal successors, (6037), 1761 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6037 transitions. [2021-02-19 19:27:09,984 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6037 transitions. Word has length 26 [2021-02-19 19:27:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:09,984 INFO L480 AbstractCegarLoop]: Abstraction has 1762 states and 6037 transitions. [2021-02-19 19:27:09,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6037 transitions. [2021-02-19 19:27:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:09,987 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:09,987 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:10,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-02-19 19:27:10,189 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 56 times [2021-02-19 19:27:10,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:10,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241590496] [2021-02-19 19:27:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:10,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241590496] [2021-02-19 19:27:10,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645130527] [2021-02-19 19:27:10,520 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 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 [2021-02-19 19:27:10,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:27:10,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:27:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:10,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:10,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:27:10,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:27:10,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:27:10,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:10,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:10,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:10,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:27:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:10,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:10,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-02-19 19:27:10,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858904318] [2021-02-19 19:27:10,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:27:10,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:10,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:27:10,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:27:10,847 INFO L87 Difference]: Start difference. First operand 1762 states and 6037 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:11,592 INFO L93 Difference]: Finished difference Result 2093 states and 6895 transitions. [2021-02-19 19:27:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:27:11,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:11,597 INFO L225 Difference]: With dead ends: 2093 [2021-02-19 19:27:11,597 INFO L226 Difference]: Without dead ends: 2071 [2021-02-19 19:27:11,597 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:27:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-02-19 19:27:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1764. [2021-02-19 19:27:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.4282473057288714) internal successors, (6044), 1763 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 6044 transitions. [2021-02-19 19:27:11,629 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 6044 transitions. Word has length 26 [2021-02-19 19:27:11,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:11,629 INFO L480 AbstractCegarLoop]: Abstraction has 1764 states and 6044 transitions. [2021-02-19 19:27:11,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:11,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 6044 transitions. [2021-02-19 19:27:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:11,632 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:11,632 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:11,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-02-19 19:27:11,832 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:11,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 57 times [2021-02-19 19:27:11,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:11,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730208673] [2021-02-19 19:27:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:12,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730208673] [2021-02-19 19:27:12,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299684403] [2021-02-19 19:27:12,183 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 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 [2021-02-19 19:27:12,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:27:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:12,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:27:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:12,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:12,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:12,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-02-19 19:27:12,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:12,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:12,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:12,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:81 [2021-02-19 19:27:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:12,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:12,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 19:27:12,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726289277] [2021-02-19 19:27:12,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:27:12,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:12,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:27:12,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:27:12,537 INFO L87 Difference]: Start difference. First operand 1764 states and 6044 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:13,541 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-02-19 19:27:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:14,155 INFO L93 Difference]: Finished difference Result 2185 states and 7305 transitions. [2021-02-19 19:27:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:27:14,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:14,160 INFO L225 Difference]: With dead ends: 2185 [2021-02-19 19:27:14,160 INFO L226 Difference]: Without dead ends: 2143 [2021-02-19 19:27:14,160 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:27:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-02-19 19:27:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1774. [2021-02-19 19:27:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.424139875916526) internal successors, (6071), 1773 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:14,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 6071 transitions. [2021-02-19 19:27:14,190 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 6071 transitions. Word has length 26 [2021-02-19 19:27:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:14,190 INFO L480 AbstractCegarLoop]: Abstraction has 1774 states and 6071 transitions. [2021-02-19 19:27:14,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 6071 transitions. [2021-02-19 19:27:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:14,193 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:14,193 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:14,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-02-19 19:27:14,394 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1754951859, now seen corresponding path program 58 times [2021-02-19 19:27:14,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:14,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223464827] [2021-02-19 19:27:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:14,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223464827] [2021-02-19 19:27:14,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40627099] [2021-02-19 19:27:14,803 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 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 [2021-02-19 19:27:14,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:27:14,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:14,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:27:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:15,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:15,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:27:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:15,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:27:15,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:27:15,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:15,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:15,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:15,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:27:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:15,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:15,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-02-19 19:27:15,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000165151] [2021-02-19 19:27:15,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:27:15,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:15,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:27:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:27:15,092 INFO L87 Difference]: Start difference. First operand 1774 states and 6071 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:16,384 INFO L93 Difference]: Finished difference Result 2185 states and 7318 transitions. [2021-02-19 19:27:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:27:16,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:16,390 INFO L225 Difference]: With dead ends: 2185 [2021-02-19 19:27:16,390 INFO L226 Difference]: Without dead ends: 2154 [2021-02-19 19:27:16,391 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:27:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-02-19 19:27:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1770. [2021-02-19 19:27:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.4262295081967213) internal successors, (6061), 1769 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:16,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 6061 transitions. [2021-02-19 19:27:16,420 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 6061 transitions. Word has length 26 [2021-02-19 19:27:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:16,421 INFO L480 AbstractCegarLoop]: Abstraction has 1770 states and 6061 transitions. [2021-02-19 19:27:16,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 6061 transitions. [2021-02-19 19:27:16,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:16,424 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:16,424 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:16,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:16,624 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:16,625 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 59 times [2021-02-19 19:27:16,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:16,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796032031] [2021-02-19 19:27:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:16,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796032031] [2021-02-19 19:27:16,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121521487] [2021-02-19 19:27:16,988 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 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 [2021-02-19 19:27:17,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:27:17,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:27:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:17,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:17,366 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-02-19 19:27:17,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 78 [2021-02-19 19:27:17,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:17,412 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-02-19 19:27:17,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:17,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:22 [2021-02-19 19:27:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:17,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:17,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:27:17,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388694825] [2021-02-19 19:27:17,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:27:17,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:17,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:27:17,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:27:17,506 INFO L87 Difference]: Start difference. First operand 1770 states and 6061 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:21,134 INFO L93 Difference]: Finished difference Result 2293 states and 7700 transitions. [2021-02-19 19:27:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:27:21,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:21,139 INFO L225 Difference]: With dead ends: 2293 [2021-02-19 19:27:21,139 INFO L226 Difference]: Without dead ends: 2278 [2021-02-19 19:27:21,140 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:27:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-02-19 19:27:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1770. [2021-02-19 19:27:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.4262295081967213) internal successors, (6061), 1769 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 6061 transitions. [2021-02-19 19:27:21,171 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 6061 transitions. Word has length 26 [2021-02-19 19:27:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:21,171 INFO L480 AbstractCegarLoop]: Abstraction has 1770 states and 6061 transitions. [2021-02-19 19:27:21,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:21,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 6061 transitions. [2021-02-19 19:27:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:21,174 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:21,174 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:21,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-02-19 19:27:21,374 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 49 times [2021-02-19 19:27:21,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:21,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700974404] [2021-02-19 19:27:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:21,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700974404] [2021-02-19 19:27:21,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324721609] [2021-02-19 19:27:21,942 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 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 [2021-02-19 19:27:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:21,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:27:21,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:22,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:22,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:22,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:27:22,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:22,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-02-19 19:27:22,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:27:22,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:22,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:22,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-02-19 19:27:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:22,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:22,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:27:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493710829] [2021-02-19 19:27:22,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:27:22,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:27:22,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:27:22,461 INFO L87 Difference]: Start difference. First operand 1770 states and 6061 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:22,749 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 19:27:23,466 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-02-19 19:27:23,989 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 19:27:24,209 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-02-19 19:27:24,554 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 19:27:25,087 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-02-19 19:27:25,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:25,887 INFO L93 Difference]: Finished difference Result 2446 states and 8095 transitions. [2021-02-19 19:27:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:27:25,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:25,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:25,892 INFO L225 Difference]: With dead ends: 2446 [2021-02-19 19:27:25,892 INFO L226 Difference]: Without dead ends: 2431 [2021-02-19 19:27:25,892 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:27:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-02-19 19:27:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1777. [2021-02-19 19:27:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 3.4262387387387387) internal successors, (6085), 1776 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 6085 transitions. [2021-02-19 19:27:25,925 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 6085 transitions. Word has length 26 [2021-02-19 19:27:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:25,925 INFO L480 AbstractCegarLoop]: Abstraction has 1777 states and 6085 transitions. [2021-02-19 19:27:25,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 6085 transitions. [2021-02-19 19:27:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:25,928 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:25,928 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:26,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:26,128 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:26,128 INFO L82 PathProgramCache]: Analyzing trace with hash 352643691, now seen corresponding path program 60 times [2021-02-19 19:27:26,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:26,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502505166] [2021-02-19 19:27:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:26,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502505166] [2021-02-19 19:27:26,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543935872] [2021-02-19 19:27:26,500 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 [2021-02-19 19:27:26,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:27:26,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:26,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:27:26,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:27,087 INFO L354 Elim1Store]: treesize reduction 30, result has 50.8 percent of original size [2021-02-19 19:27:27,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 88 [2021-02-19 19:27:27,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:27,150 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-02-19 19:27:27,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:27,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:112, output treesize:18 [2021-02-19 19:27:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:27,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:27,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 19:27:27,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146135618] [2021-02-19 19:27:27,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:27:27,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:27,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:27:27,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:27:27,265 INFO L87 Difference]: Start difference. First operand 1777 states and 6085 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:28,662 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 19:27:29,297 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 19:27:29,473 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-02-19 19:27:29,639 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-02-19 19:27:31,546 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 19:27:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:31,659 INFO L93 Difference]: Finished difference Result 2742 states and 8746 transitions. [2021-02-19 19:27:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:27:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:31,666 INFO L225 Difference]: With dead ends: 2742 [2021-02-19 19:27:31,666 INFO L226 Difference]: Without dead ends: 2705 [2021-02-19 19:27:31,666 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=343, Invalid=1913, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:27:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-02-19 19:27:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1829. [2021-02-19 19:27:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 3.4305251641137855) internal successors, (6271), 1828 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 6271 transitions. [2021-02-19 19:27:31,712 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 6271 transitions. Word has length 26 [2021-02-19 19:27:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:31,712 INFO L480 AbstractCegarLoop]: Abstraction has 1829 states and 6271 transitions. [2021-02-19 19:27:31,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 6271 transitions. [2021-02-19 19:27:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:31,715 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:31,715 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:31,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-02-19 19:27:31,916 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:31,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:31,916 INFO L82 PathProgramCache]: Analyzing trace with hash 578637215, now seen corresponding path program 61 times [2021-02-19 19:27:31,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:31,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653831295] [2021-02-19 19:27:31,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:32,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653831295] [2021-02-19 19:27:32,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034252569] [2021-02-19 19:27:32,107 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 [2021-02-19 19:27:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:32,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:27:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:32,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:27:32,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:27:32,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:27:32,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:32,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:32,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:32,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:27:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:32,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:32,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-02-19 19:27:32,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725035578] [2021-02-19 19:27:32,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:27:32,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:32,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:27:32,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:27:32,342 INFO L87 Difference]: Start difference. First operand 1829 states and 6271 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-02-19 19:27:34,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:34,938 INFO L93 Difference]: Finished difference Result 3131 states and 10131 transitions. [2021-02-19 19:27:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:27:34,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 26 [2021-02-19 19:27:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:34,946 INFO L225 Difference]: With dead ends: 3131 [2021-02-19 19:27:34,946 INFO L226 Difference]: Without dead ends: 3101 [2021-02-19 19:27:34,947 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:27:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-02-19 19:27:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 1888. [2021-02-19 19:27:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4319024907260203) internal successors, (6476), 1887 states have internal predecessors, (6476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6476 transitions. [2021-02-19 19:27:35,001 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6476 transitions. Word has length 26 [2021-02-19 19:27:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:35,001 INFO L480 AbstractCegarLoop]: Abstraction has 1888 states and 6476 transitions. [2021-02-19 19:27:35,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-02-19 19:27:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6476 transitions. [2021-02-19 19:27:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:35,004 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:35,004 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:35,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:35,206 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:35,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:35,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 62 times [2021-02-19 19:27:35,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:35,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559676214] [2021-02-19 19:27:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:35,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559676214] [2021-02-19 19:27:35,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858322766] [2021-02-19 19:27:35,613 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 [2021-02-19 19:27:35,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:27:35,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:35,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:27:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:36,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:36,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-02-19 19:27:36,104 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:27:36,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:36,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:36,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:25 [2021-02-19 19:27:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:36,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:36,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 19:27:36,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293585307] [2021-02-19 19:27:36,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:27:36,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:36,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:27:36,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:27:36,350 INFO L87 Difference]: Start difference. First operand 1888 states and 6476 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:36,988 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 19:27:37,496 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-02-19 19:27:38,822 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-02-19 19:27:39,020 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-02-19 19:27:40,017 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 19:27:40,677 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 19:27:41,013 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-02-19 19:27:41,356 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 19:27:41,629 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 19:27:42,246 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 19:27:42,739 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-02-19 19:27:42,977 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-02-19 19:27:43,366 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-02-19 19:27:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:43,519 INFO L93 Difference]: Finished difference Result 3535 states and 11276 transitions. [2021-02-19 19:27:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:27:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:43,528 INFO L225 Difference]: With dead ends: 3535 [2021-02-19 19:27:43,528 INFO L226 Difference]: Without dead ends: 3469 [2021-02-19 19:27:43,528 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=535, Invalid=2545, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 19:27:43,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-02-19 19:27:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 1896. [2021-02-19 19:27:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.4321899736147756) internal successors, (6504), 1895 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6504 transitions. [2021-02-19 19:27:43,573 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6504 transitions. Word has length 26 [2021-02-19 19:27:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:43,573 INFO L480 AbstractCegarLoop]: Abstraction has 1896 states and 6504 transitions. [2021-02-19 19:27:43,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6504 transitions. [2021-02-19 19:27:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:43,576 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:43,576 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:43,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-02-19 19:27:43,777 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash -32178733, now seen corresponding path program 50 times [2021-02-19 19:27:43,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:43,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128366825] [2021-02-19 19:27:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:44,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128366825] [2021-02-19 19:27:44,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895847722] [2021-02-19 19:27:44,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:27:44,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:27:44,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:44,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:27:44,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:44,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:44,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:44,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-02-19 19:27:44,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:44,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:44,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:44,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-02-19 19:27:45,171 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 19:27:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:45,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:45,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:27:45,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616458917] [2021-02-19 19:27:45,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:27:45,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:45,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:27:45,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:27:45,368 INFO L87 Difference]: Start difference. First operand 1896 states and 6504 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:45,661 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:27:45,809 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 21 [2021-02-19 19:27:46,100 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 19:27:46,541 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 19:27:47,193 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-02-19 19:27:47,384 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 19:27:47,716 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-02-19 19:27:48,387 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 19:27:48,558 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-02-19 19:27:48,708 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-02-19 19:27:49,017 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 19:27:49,430 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-02-19 19:27:49,724 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-02-19 19:27:50,310 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 19:27:50,787 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 19:27:51,065 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 19:27:51,649 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-02-19 19:27:51,949 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 19:27:52,271 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 19:27:52,675 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-02-19 19:27:52,974 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-02-19 19:27:53,455 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-02-19 19:27:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:53,679 INFO L93 Difference]: Finished difference Result 2640 states and 8706 transitions. [2021-02-19 19:27:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:27:53,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:27:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:53,685 INFO L225 Difference]: With dead ends: 2640 [2021-02-19 19:27:53,685 INFO L226 Difference]: Without dead ends: 2625 [2021-02-19 19:27:53,686 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=391, Invalid=2365, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 19:27:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-02-19 19:27:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1917. [2021-02-19 19:27:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 3.432150313152401) internal successors, (6576), 1916 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 6576 transitions. [2021-02-19 19:27:53,722 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 6576 transitions. Word has length 26 [2021-02-19 19:27:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:53,722 INFO L480 AbstractCegarLoop]: Abstraction has 1917 states and 6576 transitions. [2021-02-19 19:27:53,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 6576 transitions. [2021-02-19 19:27:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:27:53,725 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:53,725 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:53,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:53,925 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1082759433, now seen corresponding path program 51 times [2021-02-19 19:27:53,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:53,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540031364] [2021-02-19 19:27:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:54,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540031364] [2021-02-19 19:27:54,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498323837] [2021-02-19 19:27:54,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:54,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:27:54,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:27:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:54,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:54,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-02-19 19:27:54,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:54,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:54,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:54,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:77 [2021-02-19 19:27:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:54,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:54,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-02-19 19:27:54,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229983217] [2021-02-19 19:27:54,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:27:54,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:54,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:27:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:27:54,614 INFO L87 Difference]: Start difference. First operand 1917 states and 6576 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:55,206 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-02-19 19:27:55,516 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 19:27:55,694 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 19:27:56,098 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-02-19 19:27:56,335 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-02-19 19:27:56,642 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-02-19 19:27:57,158 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 19:27:57,329 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-02-19 19:27:57,475 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-02-19 19:27:58,422 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-02-19 19:27:58,656 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-02-19 19:27:58,852 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-02-19 19:27:59,406 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-02-19 19:27:59,949 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 19:28:00,314 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2021-02-19 19:28:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:00,898 INFO L93 Difference]: Finished difference Result 2989 states and 9732 transitions. [2021-02-19 19:28:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 19:28:00,905 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:28:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:00,910 INFO L225 Difference]: With dead ends: 2989 [2021-02-19 19:28:00,911 INFO L226 Difference]: Without dead ends: 2974 [2021-02-19 19:28:00,911 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:28:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2021-02-19 19:28:00,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 1913. [2021-02-19 19:28:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 3.4299163179916317) internal successors, (6558), 1912 states have internal predecessors, (6558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 6558 transitions. [2021-02-19 19:28:00,952 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 6558 transitions. Word has length 26 [2021-02-19 19:28:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:00,952 INFO L480 AbstractCegarLoop]: Abstraction has 1913 states and 6558 transitions. [2021-02-19 19:28:00,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 6558 transitions. [2021-02-19 19:28:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:28:00,955 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:00,955 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:01,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-02-19 19:28:01,156 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:01,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:01,156 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 52 times [2021-02-19 19:28:01,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:01,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196751263] [2021-02-19 19:28:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:01,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196751263] [2021-02-19 19:28:01,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113798875] [2021-02-19 19:28:01,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:01,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:28:01,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:28:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:28:01,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:01,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:28:01,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:28:01,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:01,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:01,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-02-19 19:28:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:02,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:02,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 19:28:02,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580030379] [2021-02-19 19:28:02,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:28:02,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:28:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:28:02,125 INFO L87 Difference]: Start difference. First operand 1913 states and 6558 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:02,852 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 19:28:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:04,523 INFO L93 Difference]: Finished difference Result 2601 states and 8669 transitions. [2021-02-19 19:28:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:28:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:28:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:04,530 INFO L225 Difference]: With dead ends: 2601 [2021-02-19 19:28:04,530 INFO L226 Difference]: Without dead ends: 2576 [2021-02-19 19:28:04,530 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:28:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-02-19 19:28:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1901. [2021-02-19 19:28:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 3.4342105263157894) internal successors, (6525), 1900 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 6525 transitions. [2021-02-19 19:28:04,565 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 6525 transitions. Word has length 26 [2021-02-19 19:28:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:04,565 INFO L480 AbstractCegarLoop]: Abstraction has 1901 states and 6525 transitions. [2021-02-19 19:28:04,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 6525 transitions. [2021-02-19 19:28:04,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:28:04,568 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:04,568 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:04,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:04,769 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:04,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:04,769 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 63 times [2021-02-19 19:28:04,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:04,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715946301] [2021-02-19 19:28:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:05,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715946301] [2021-02-19 19:28:05,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830598502] [2021-02-19 19:28:05,232 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 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 [2021-02-19 19:28:05,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:28:05,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:05,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:28:05,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:28:05,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:28:05,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:28:05,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:28:05,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:28:05,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:05,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:05,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:05,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:28:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:05,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:05,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-02-19 19:28:05,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205908110] [2021-02-19 19:28:05,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:28:05,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:05,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:28:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:28:05,725 INFO L87 Difference]: Start difference. First operand 1901 states and 6525 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:06,150 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-02-19 19:28:07,516 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 19:28:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:08,139 INFO L93 Difference]: Finished difference Result 2698 states and 8873 transitions. [2021-02-19 19:28:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:28:08,140 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:28:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:08,144 INFO L225 Difference]: With dead ends: 2698 [2021-02-19 19:28:08,144 INFO L226 Difference]: Without dead ends: 2668 [2021-02-19 19:28:08,144 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:28:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2021-02-19 19:28:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 1940. [2021-02-19 19:28:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 3.4306343476018566) internal successors, (6652), 1939 states have internal predecessors, (6652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 6652 transitions. [2021-02-19 19:28:08,168 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 6652 transitions. Word has length 26 [2021-02-19 19:28:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:08,168 INFO L480 AbstractCegarLoop]: Abstraction has 1940 states and 6652 transitions. [2021-02-19 19:28:08,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 6652 transitions. [2021-02-19 19:28:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:28:08,171 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:08,171 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:08,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:08,371 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:08,371 INFO L82 PathProgramCache]: Analyzing trace with hash 402208991, now seen corresponding path program 64 times [2021-02-19 19:28:08,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:08,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108734744] [2021-02-19 19:28:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:08,709 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 19:28:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:08,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108734744] [2021-02-19 19:28:08,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814923733] [2021-02-19 19:28:08,907 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 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 [2021-02-19 19:28:08,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:28:08,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:28:08,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:09,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:28:09,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:28:09,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:28:09,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 19:28:09,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:09,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:09,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:09,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-02-19 19:28:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:09,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:09,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 19:28:09,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068892138] [2021-02-19 19:28:09,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:28:09,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:09,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:28:09,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:28:09,469 INFO L87 Difference]: Start difference. First operand 1940 states and 6652 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:09,963 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 19:28:10,410 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 19:28:10,674 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 19:28:11,382 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-02-19 19:28:11,590 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 19:28:11,913 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 19:28:12,139 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-02-19 19:28:12,312 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 19:28:12,484 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-02-19 19:28:12,721 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-02-19 19:28:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:13,559 INFO L93 Difference]: Finished difference Result 2873 states and 9483 transitions. [2021-02-19 19:28:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:28:13,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:28:13,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:13,567 INFO L225 Difference]: With dead ends: 2873 [2021-02-19 19:28:13,567 INFO L226 Difference]: Without dead ends: 2851 [2021-02-19 19:28:13,567 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=349, Invalid=1211, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:28:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-02-19 19:28:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 1940. [2021-02-19 19:28:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 3.4296028880866425) internal successors, (6650), 1939 states have internal predecessors, (6650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 6650 transitions. [2021-02-19 19:28:13,607 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 6650 transitions. Word has length 26 [2021-02-19 19:28:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:13,607 INFO L480 AbstractCegarLoop]: Abstraction has 1940 states and 6650 transitions. [2021-02-19 19:28:13,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 6650 transitions. [2021-02-19 19:28:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:28:13,610 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:13,610 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:13,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:13,811 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 65 times [2021-02-19 19:28:13,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:13,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233150611] [2021-02-19 19:28:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:14,157 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 19:28:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:14,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233150611] [2021-02-19 19:28:14,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861238979] [2021-02-19 19:28:14,373 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 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 [2021-02-19 19:28:14,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:28:14,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:14,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:28:14,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:28:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:28:14,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:14,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-02-19 19:28:14,761 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:28:14,820 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-02-19 19:28:14,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:14,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-02-19 19:28:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:14,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:14,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-02-19 19:28:14,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816433458] [2021-02-19 19:28:14,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:28:14,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:14,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:28:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:28:14,983 INFO L87 Difference]: Start difference. First operand 1940 states and 6650 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-02-19 19:28:15,631 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-02-19 19:28:16,308 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-02-19 19:28:16,818 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 19:28:16,969 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-02-19 19:28:17,189 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-02-19 19:28:17,747 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 19:28:18,128 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-02-19 19:28:18,427 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 19:28:18,791 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-02-19 19:28:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:19,152 INFO L93 Difference]: Finished difference Result 2820 states and 9291 transitions. [2021-02-19 19:28:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:28:19,154 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 26 [2021-02-19 19:28:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:19,159 INFO L225 Difference]: With dead ends: 2820 [2021-02-19 19:28:19,159 INFO L226 Difference]: Without dead ends: 2771 [2021-02-19 19:28:19,159 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:28:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-02-19 19:28:19,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1940. [2021-02-19 19:28:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 3.4285714285714284) internal successors, (6648), 1939 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 6648 transitions. [2021-02-19 19:28:19,195 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 6648 transitions. Word has length 26 [2021-02-19 19:28:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:19,196 INFO L480 AbstractCegarLoop]: Abstraction has 1940 states and 6648 transitions. [2021-02-19 19:28:19,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-02-19 19:28:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 6648 transitions. [2021-02-19 19:28:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:28:19,199 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:19,199 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:19,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-02-19 19:28:19,399 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash 256075815, now seen corresponding path program 53 times [2021-02-19 19:28:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:19,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613011979] [2021-02-19 19:28:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:19,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613011979] [2021-02-19 19:28:19,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499262295] [2021-02-19 19:28:19,790 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 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 [2021-02-19 19:28:19,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:28:19,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:28:19,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:20,280 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-02-19 19:28:20,280 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 66 treesize of output 49 [2021-02-19 19:28:20,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:20,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:20,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:20,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-02-19 19:28:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:20,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:20,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:28:20,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955401274] [2021-02-19 19:28:20,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:28:20,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:20,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:28:20,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:28:20,324 INFO L87 Difference]: Start difference. First operand 1940 states and 6648 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:21,560 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-02-19 19:28:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:22,840 INFO L93 Difference]: Finished difference Result 2442 states and 8193 transitions. [2021-02-19 19:28:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:28:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:28:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:22,848 INFO L225 Difference]: With dead ends: 2442 [2021-02-19 19:28:22,848 INFO L226 Difference]: Without dead ends: 2427 [2021-02-19 19:28:22,848 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:28:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-02-19 19:28:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1937. [2021-02-19 19:28:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.4235537190082646) internal successors, (6628), 1936 states have internal predecessors, (6628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6628 transitions. [2021-02-19 19:28:22,882 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6628 transitions. Word has length 26 [2021-02-19 19:28:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:22,883 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 6628 transitions. [2021-02-19 19:28:22,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6628 transitions. [2021-02-19 19:28:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:28:22,886 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:22,886 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:23,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:23,086 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:23,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:23,087 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 54 times [2021-02-19 19:28:23,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:23,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42377248] [2021-02-19 19:28:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:23,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42377248] [2021-02-19 19:28:23,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663720158] [2021-02-19 19:28:23,510 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 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 [2021-02-19 19:28:23,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:28:23,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:28:23,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:24,055 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-02-19 19:28:24,056 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 69 [2021-02-19 19:28:24,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:24,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:24,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:24,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:32 [2021-02-19 19:28:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:24,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:24,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 19:28:24,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389218759] [2021-02-19 19:28:24,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:28:24,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:24,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:28:24,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:28:24,359 INFO L87 Difference]: Start difference. First operand 1937 states and 6628 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:24,721 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 19:28:25,418 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-02-19 19:28:25,651 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 19:28:26,516 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-02-19 19:28:27,571 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-02-19 19:28:27,820 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-02-19 19:28:28,152 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-02-19 19:28:28,709 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-02-19 19:28:29,026 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-02-19 19:28:29,292 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-02-19 19:28:29,761 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 19:28:30,253 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 19:28:30,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:30,855 INFO L93 Difference]: Finished difference Result 2884 states and 9442 transitions. [2021-02-19 19:28:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:28:30,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:28:30,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:30,860 INFO L225 Difference]: With dead ends: 2884 [2021-02-19 19:28:30,860 INFO L226 Difference]: Without dead ends: 2819 [2021-02-19 19:28:30,861 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=355, Invalid=1901, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:28:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-02-19 19:28:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 1960. [2021-02-19 19:28:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1959 states have (on average 3.4165390505359876) internal successors, (6693), 1959 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 6693 transitions. [2021-02-19 19:28:30,894 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 6693 transitions. Word has length 26 [2021-02-19 19:28:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:30,894 INFO L480 AbstractCegarLoop]: Abstraction has 1960 states and 6693 transitions. [2021-02-19 19:28:30,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 6693 transitions. [2021-02-19 19:28:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:28:30,897 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:30,897 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:31,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:31,098 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:31,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:31,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1700400349, now seen corresponding path program 55 times [2021-02-19 19:28:31,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:31,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874170225] [2021-02-19 19:28:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:31,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874170225] [2021-02-19 19:28:31,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679129456] [2021-02-19 19:28:31,546 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 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 [2021-02-19 19:28:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:28:31,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:32,022 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-02-19 19:28:32,023 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 66 treesize of output 54 [2021-02-19 19:28:32,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:32,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:32,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:32,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-02-19 19:28:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:32,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:32,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:28:32,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58546511] [2021-02-19 19:28:32,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:28:32,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:32,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:28:32,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:28:32,221 INFO L87 Difference]: Start difference. First operand 1960 states and 6693 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:32,592 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:28:33,361 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-02-19 19:28:33,988 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-02-19 19:28:34,516 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-02-19 19:28:34,770 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 19:28:35,719 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:28:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:36,198 INFO L93 Difference]: Finished difference Result 2757 states and 9198 transitions. [2021-02-19 19:28:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:28:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:28:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:36,206 INFO L225 Difference]: With dead ends: 2757 [2021-02-19 19:28:36,206 INFO L226 Difference]: Without dead ends: 2742 [2021-02-19 19:28:36,206 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:28:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2021-02-19 19:28:36,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 1949. [2021-02-19 19:28:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.419917864476386) internal successors, (6662), 1948 states have internal predecessors, (6662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6662 transitions. [2021-02-19 19:28:36,246 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6662 transitions. Word has length 26 [2021-02-19 19:28:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:36,246 INFO L480 AbstractCegarLoop]: Abstraction has 1949 states and 6662 transitions. [2021-02-19 19:28:36,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6662 transitions. [2021-02-19 19:28:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:28:36,250 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:36,250 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:36,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:36,450 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:36,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 56 times [2021-02-19 19:28:36,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:36,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682621208] [2021-02-19 19:28:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:36,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682621208] [2021-02-19 19:28:36,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987153785] [2021-02-19 19:28:36,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:28:36,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:28:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:36,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:28:36,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:37,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:28:37,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:37,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-02-19 19:28:37,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:28:37,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:37,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:37,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-02-19 19:28:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:37,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:37,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 19:28:37,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674487995] [2021-02-19 19:28:37,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:28:37,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:37,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:28:37,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:28:37,584 INFO L87 Difference]: Start difference. First operand 1949 states and 6662 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:37,961 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 19:28:38,574 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-02-19 19:28:39,310 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 19:28:39,810 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-02-19 19:28:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:40,537 INFO L93 Difference]: Finished difference Result 2646 states and 8823 transitions. [2021-02-19 19:28:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:28:40,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:28:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:40,545 INFO L225 Difference]: With dead ends: 2646 [2021-02-19 19:28:40,545 INFO L226 Difference]: Without dead ends: 2610 [2021-02-19 19:28:40,545 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:28:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2021-02-19 19:28:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 1949. [2021-02-19 19:28:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.419917864476386) internal successors, (6662), 1948 states have internal predecessors, (6662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6662 transitions. [2021-02-19 19:28:40,583 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6662 transitions. Word has length 26 [2021-02-19 19:28:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:40,583 INFO L480 AbstractCegarLoop]: Abstraction has 1949 states and 6662 transitions. [2021-02-19 19:28:40,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6662 transitions. [2021-02-19 19:28:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:28:40,586 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:40,586 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:40,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-02-19 19:28:40,787 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:40,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 57 times [2021-02-19 19:28:40,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:40,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161842578] [2021-02-19 19:28:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:40,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161842578] [2021-02-19 19:28:40,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082002119] [2021-02-19 19:28:40,912 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 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 [2021-02-19 19:28:40,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:28:40,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:40,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:28:40,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:41,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:41,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:28:41,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585426982] [2021-02-19 19:28:41,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:28:41,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:41,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:28:41,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:28:41,185 INFO L87 Difference]: Start difference. First operand 1949 states and 6662 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:43,565 INFO L93 Difference]: Finished difference Result 4920 states and 15266 transitions. [2021-02-19 19:28:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:28:43,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:28:43,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:43,574 INFO L225 Difference]: With dead ends: 4920 [2021-02-19 19:28:43,574 INFO L226 Difference]: Without dead ends: 4920 [2021-02-19 19:28:43,574 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:28:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2021-02-19 19:28:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 2147. [2021-02-19 19:28:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.4753028890959925) internal successors, (7458), 2146 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7458 transitions. [2021-02-19 19:28:43,615 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7458 transitions. Word has length 28 [2021-02-19 19:28:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:43,615 INFO L480 AbstractCegarLoop]: Abstraction has 2147 states and 7458 transitions. [2021-02-19 19:28:43,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7458 transitions. [2021-02-19 19:28:43,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:28:43,617 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:43,618 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:43,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:43,818 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:43,818 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 58 times [2021-02-19 19:28:43,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:43,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483656376] [2021-02-19 19:28:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:43,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483656376] [2021-02-19 19:28:43,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684884220] [2021-02-19 19:28:43,895 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 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 [2021-02-19 19:28:43,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:28:43,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:43,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:28:43,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:44,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:44,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:28:44,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661293978] [2021-02-19 19:28:44,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:28:44,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:44,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:28:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:28:44,155 INFO L87 Difference]: Start difference. First operand 2147 states and 7458 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:46,871 INFO L93 Difference]: Finished difference Result 6491 states and 19824 transitions. [2021-02-19 19:28:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 19:28:46,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:28:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:46,883 INFO L225 Difference]: With dead ends: 6491 [2021-02-19 19:28:46,883 INFO L226 Difference]: Without dead ends: 6491 [2021-02-19 19:28:46,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 19:28:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6491 states. [2021-02-19 19:28:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6491 to 2161. [2021-02-19 19:28:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 3.484259259259259) internal successors, (7526), 2160 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:46,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 7526 transitions. [2021-02-19 19:28:46,938 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 7526 transitions. Word has length 28 [2021-02-19 19:28:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:46,938 INFO L480 AbstractCegarLoop]: Abstraction has 2161 states and 7526 transitions. [2021-02-19 19:28:46,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 7526 transitions. [2021-02-19 19:28:46,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:28:46,941 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:46,941 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:47,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-02-19 19:28:47,141 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:47,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:47,142 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 59 times [2021-02-19 19:28:47,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:47,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133927644] [2021-02-19 19:28:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:47,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133927644] [2021-02-19 19:28:47,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882274498] [2021-02-19 19:28:47,229 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 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 [2021-02-19 19:28:47,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:28:47,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:47,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:28:47,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:47,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:47,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:28:47,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044728115] [2021-02-19 19:28:47,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:28:47,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:28:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:28:47,506 INFO L87 Difference]: Start difference. First operand 2161 states and 7526 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:49,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:49,854 INFO L93 Difference]: Finished difference Result 5883 states and 18355 transitions. [2021-02-19 19:28:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 19:28:49,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:28:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:49,865 INFO L225 Difference]: With dead ends: 5883 [2021-02-19 19:28:49,865 INFO L226 Difference]: Without dead ends: 5883 [2021-02-19 19:28:49,866 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 19:28:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5883 states. [2021-02-19 19:28:49,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5883 to 2106. [2021-02-19 19:28:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 3.4584323040380047) internal successors, (7280), 2105 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 7280 transitions. [2021-02-19 19:28:49,915 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 7280 transitions. Word has length 28 [2021-02-19 19:28:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:49,915 INFO L480 AbstractCegarLoop]: Abstraction has 2106 states and 7280 transitions. [2021-02-19 19:28:49,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 7280 transitions. [2021-02-19 19:28:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:28:49,917 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:49,918 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:50,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:50,118 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:50,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 60 times [2021-02-19 19:28:50,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:50,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186250375] [2021-02-19 19:28:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:50,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186250375] [2021-02-19 19:28:50,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928292075] [2021-02-19 19:28:50,206 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 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 [2021-02-19 19:28:50,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:28:50,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:50,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:28:50,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:50,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:50,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:28:50,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512227989] [2021-02-19 19:28:50,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:28:50,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:28:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:28:50,435 INFO L87 Difference]: Start difference. First operand 2106 states and 7280 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-02-19 19:28:52,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:52,479 INFO L93 Difference]: Finished difference Result 5006 states and 15433 transitions. [2021-02-19 19:28:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 19:28:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:28:52,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:52,488 INFO L225 Difference]: With dead ends: 5006 [2021-02-19 19:28:52,488 INFO L226 Difference]: Without dead ends: 5006 [2021-02-19 19:28:52,489 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:28:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-02-19 19:28:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 2116. [2021-02-19 19:28:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 3.4543735224586287) internal successors, (7306), 2115 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 7306 transitions. [2021-02-19 19:28:52,539 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 7306 transitions. Word has length 28 [2021-02-19 19:28:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:52,539 INFO L480 AbstractCegarLoop]: Abstraction has 2116 states and 7306 transitions. [2021-02-19 19:28:52,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-02-19 19:28:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 7306 transitions. [2021-02-19 19:28:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:28:52,541 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:52,542 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:52,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:52,743 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:52,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:52,743 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 66 times [2021-02-19 19:28:52,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:52,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215361615] [2021-02-19 19:28:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:52,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215361615] [2021-02-19 19:28:52,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072788447] [2021-02-19 19:28:52,824 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 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 [2021-02-19 19:28:52,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:28:52,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:52,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:28:52,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:53,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:53,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-02-19 19:28:53,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633001492] [2021-02-19 19:28:53,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:28:53,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:28:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:28:53,031 INFO L87 Difference]: Start difference. First operand 2116 states and 7306 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:54,141 INFO L93 Difference]: Finished difference Result 4425 states and 13828 transitions. [2021-02-19 19:28:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:28:54,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:28:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:54,147 INFO L225 Difference]: With dead ends: 4425 [2021-02-19 19:28:54,147 INFO L226 Difference]: Without dead ends: 4425 [2021-02-19 19:28:54,148 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:28:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4425 states. [2021-02-19 19:28:54,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4425 to 2172. [2021-02-19 19:28:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 3.440350069092584) internal successors, (7469), 2171 states have internal predecessors, (7469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:54,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 7469 transitions. [2021-02-19 19:28:54,183 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 7469 transitions. Word has length 28 [2021-02-19 19:28:54,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:54,183 INFO L480 AbstractCegarLoop]: Abstraction has 2172 states and 7469 transitions. [2021-02-19 19:28:54,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 7469 transitions. [2021-02-19 19:28:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:28:54,185 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:54,185 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:54,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:54,395 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:54,395 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 61 times [2021-02-19 19:28:54,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:54,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700360825] [2021-02-19 19:28:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:28:54,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700360825] [2021-02-19 19:28:54,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389587260] [2021-02-19 19:28:54,456 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 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 [2021-02-19 19:28:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:54,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:28:54,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:28:54,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:54,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:28:54,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475536276] [2021-02-19 19:28:54,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:28:54,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:28:54,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:28:54,613 INFO L87 Difference]: Start difference. First operand 2172 states and 7469 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:54,935 INFO L93 Difference]: Finished difference Result 3682 states and 12015 transitions. [2021-02-19 19:28:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:28:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:28:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:54,942 INFO L225 Difference]: With dead ends: 3682 [2021-02-19 19:28:54,942 INFO L226 Difference]: Without dead ends: 3658 [2021-02-19 19:28:54,943 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:28:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-02-19 19:28:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 2554. [2021-02-19 19:28:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 3.509596553074814) internal successors, (8960), 2553 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 8960 transitions. [2021-02-19 19:28:54,979 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 8960 transitions. Word has length 28 [2021-02-19 19:28:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:54,979 INFO L480 AbstractCegarLoop]: Abstraction has 2554 states and 8960 transitions. [2021-02-19 19:28:54,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 8960 transitions. [2021-02-19 19:28:54,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:28:54,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:54,982 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:55,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:55,183 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:55,183 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 62 times [2021-02-19 19:28:55,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:55,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935869569] [2021-02-19 19:28:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:55,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935869569] [2021-02-19 19:28:55,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706410558] [2021-02-19 19:28:55,241 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:55,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:28:55,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:55,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:28:55,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:55,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:55,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 19:28:55,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497282695] [2021-02-19 19:28:55,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:28:55,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:55,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:28:55,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:28:55,424 INFO L87 Difference]: Start difference. First operand 2554 states and 8960 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:56,629 INFO L93 Difference]: Finished difference Result 4313 states and 13804 transitions. [2021-02-19 19:28:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:28:56,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:28:56,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:56,636 INFO L225 Difference]: With dead ends: 4313 [2021-02-19 19:28:56,636 INFO L226 Difference]: Without dead ends: 4266 [2021-02-19 19:28:56,637 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:28:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-02-19 19:28:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 2719. [2021-02-19 19:28:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 3.5275938189845473) internal successors, (9588), 2718 states have internal predecessors, (9588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 9588 transitions. [2021-02-19 19:28:56,716 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 9588 transitions. Word has length 28 [2021-02-19 19:28:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:56,716 INFO L480 AbstractCegarLoop]: Abstraction has 2719 states and 9588 transitions. [2021-02-19 19:28:56,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 9588 transitions. [2021-02-19 19:28:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:28:56,720 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:56,720 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:56,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:56,926 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:56,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1371854597, now seen corresponding path program 67 times [2021-02-19 19:28:56,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:56,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973114733] [2021-02-19 19:28:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:57,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973114733] [2021-02-19 19:28:57,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083297200] [2021-02-19 19:28:57,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:57,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:28:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:57,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:57,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 19:28:57,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026450732] [2021-02-19 19:28:57,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:28:57,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:57,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:28:57,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:28:57,216 INFO L87 Difference]: Start difference. First operand 2719 states and 9588 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:58,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:58,066 INFO L93 Difference]: Finished difference Result 5158 states and 17160 transitions. [2021-02-19 19:28:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:28:58,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:28:58,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:58,076 INFO L225 Difference]: With dead ends: 5158 [2021-02-19 19:28:58,076 INFO L226 Difference]: Without dead ends: 5071 [2021-02-19 19:28:58,076 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:28:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5071 states. [2021-02-19 19:28:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5071 to 3379. [2021-02-19 19:28:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 3.5473653049141505) internal successors, (11983), 3378 states have internal predecessors, (11983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 11983 transitions. [2021-02-19 19:28:58,138 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 11983 transitions. Word has length 28 [2021-02-19 19:28:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:58,138 INFO L480 AbstractCegarLoop]: Abstraction has 3379 states and 11983 transitions. [2021-02-19 19:28:58,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 11983 transitions. [2021-02-19 19:28:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:28:58,143 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:58,143 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:58,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-02-19 19:28:58,357 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 63 times [2021-02-19 19:28:58,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:58,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781231033] [2021-02-19 19:28:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:58,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781231033] [2021-02-19 19:28:58,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016729142] [2021-02-19 19:28:58,425 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 [2021-02-19 19:28:58,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:28:58,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:58,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:28:58,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:58,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:58,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 19:28:58,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846542853] [2021-02-19 19:28:58,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:28:58,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:58,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:28:58,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:28:58,642 INFO L87 Difference]: Start difference. First operand 3379 states and 11983 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:00,002 INFO L93 Difference]: Finished difference Result 5616 states and 17882 transitions. [2021-02-19 19:29:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:29:00,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:00,013 INFO L225 Difference]: With dead ends: 5616 [2021-02-19 19:29:00,013 INFO L226 Difference]: Without dead ends: 5590 [2021-02-19 19:29:00,014 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:29:00,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5590 states. [2021-02-19 19:29:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5590 to 3397. [2021-02-19 19:29:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 3.552414605418139) internal successors, (12064), 3396 states have internal predecessors, (12064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 12064 transitions. [2021-02-19 19:29:00,082 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 12064 transitions. Word has length 28 [2021-02-19 19:29:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:00,082 INFO L480 AbstractCegarLoop]: Abstraction has 3397 states and 12064 transitions. [2021-02-19 19:29:00,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 12064 transitions. [2021-02-19 19:29:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:00,087 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:00,087 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:00,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:00,288 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:00,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 64 times [2021-02-19 19:29:00,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:00,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857850379] [2021-02-19 19:29:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857850379] [2021-02-19 19:29:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268632218] [2021-02-19 19:29:00,370 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 [2021-02-19 19:29:00,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:29:00,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:29:00,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:00,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:00,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 19:29:00,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700282330] [2021-02-19 19:29:00,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:29:00,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:00,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:29:00,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:29:00,620 INFO L87 Difference]: Start difference. First operand 3397 states and 12064 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:02,013 INFO L93 Difference]: Finished difference Result 5671 states and 18074 transitions. [2021-02-19 19:29:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:29:02,015 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:02,024 INFO L225 Difference]: With dead ends: 5671 [2021-02-19 19:29:02,024 INFO L226 Difference]: Without dead ends: 5640 [2021-02-19 19:29:02,024 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:29:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5640 states. [2021-02-19 19:29:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5640 to 3390. [2021-02-19 19:29:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3390 states, 3389 states have (on average 3.5585718501032755) internal successors, (12060), 3389 states have internal predecessors, (12060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3390 states to 3390 states and 12060 transitions. [2021-02-19 19:29:02,087 INFO L78 Accepts]: Start accepts. Automaton has 3390 states and 12060 transitions. Word has length 28 [2021-02-19 19:29:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:02,087 INFO L480 AbstractCegarLoop]: Abstraction has 3390 states and 12060 transitions. [2021-02-19 19:29:02,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3390 states and 12060 transitions. [2021-02-19 19:29:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:02,092 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:02,092 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:02,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-02-19 19:29:02,292 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 65 times [2021-02-19 19:29:02,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:02,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452471274] [2021-02-19 19:29:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:02,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452471274] [2021-02-19 19:29:02,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228893999] [2021-02-19 19:29:02,378 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 [2021-02-19 19:29:02,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:29:02,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:02,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:29:02,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:02,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:02,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 19:29:02,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55973693] [2021-02-19 19:29:02,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:29:02,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:02,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:29:02,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:29:02,596 INFO L87 Difference]: Start difference. First operand 3390 states and 12060 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:03,842 INFO L93 Difference]: Finished difference Result 6859 states and 22232 transitions. [2021-02-19 19:29:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:29:03,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:03,855 INFO L225 Difference]: With dead ends: 6859 [2021-02-19 19:29:03,856 INFO L226 Difference]: Without dead ends: 6812 [2021-02-19 19:29:03,856 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:29:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6812 states. [2021-02-19 19:29:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6812 to 3553. [2021-02-19 19:29:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 3552 states have (on average 3.602759009009009) internal successors, (12797), 3552 states have internal predecessors, (12797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 12797 transitions. [2021-02-19 19:29:03,928 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 12797 transitions. Word has length 28 [2021-02-19 19:29:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:03,928 INFO L480 AbstractCegarLoop]: Abstraction has 3553 states and 12797 transitions. [2021-02-19 19:29:03,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 12797 transitions. [2021-02-19 19:29:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:03,932 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:03,932 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:04,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-02-19 19:29:04,132 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:04,133 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 66 times [2021-02-19 19:29:04,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:04,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828107819] [2021-02-19 19:29:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:29:04,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828107819] [2021-02-19 19:29:04,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628607131] [2021-02-19 19:29:04,185 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 [2021-02-19 19:29:04,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:29:04,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:04,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:29:04,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:29:04,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:04,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 19:29:04,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377745943] [2021-02-19 19:29:04,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:29:04,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:04,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:29:04,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:29:04,364 INFO L87 Difference]: Start difference. First operand 3553 states and 12797 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-02-19 19:29:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:04,688 INFO L93 Difference]: Finished difference Result 5241 states and 17399 transitions. [2021-02-19 19:29:04,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:29:04,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:04,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:04,697 INFO L225 Difference]: With dead ends: 5241 [2021-02-19 19:29:04,698 INFO L226 Difference]: Without dead ends: 5241 [2021-02-19 19:29:04,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:29:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5241 states. [2021-02-19 19:29:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5241 to 3350. [2021-02-19 19:29:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3349 states have (on average 3.55747984472977) internal successors, (11914), 3349 states have internal predecessors, (11914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 11914 transitions. [2021-02-19 19:29:04,754 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 11914 transitions. Word has length 28 [2021-02-19 19:29:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:04,754 INFO L480 AbstractCegarLoop]: Abstraction has 3350 states and 11914 transitions. [2021-02-19 19:29:04,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-02-19 19:29:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 11914 transitions. [2021-02-19 19:29:04,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:04,759 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:04,759 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:04,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-02-19 19:29:04,959 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:04,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 67 times [2021-02-19 19:29:04,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:04,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664816300] [2021-02-19 19:29:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:05,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664816300] [2021-02-19 19:29:05,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325784183] [2021-02-19 19:29:05,049 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 [2021-02-19 19:29:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:05,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:05,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:05,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 19:29:05,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732977946] [2021-02-19 19:29:05,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:29:05,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:29:05,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:29:05,227 INFO L87 Difference]: Start difference. First operand 3350 states and 11914 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-02-19 19:29:06,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:06,586 INFO L93 Difference]: Finished difference Result 7282 states and 23295 transitions. [2021-02-19 19:29:06,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 19:29:06,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:06,599 INFO L225 Difference]: With dead ends: 7282 [2021-02-19 19:29:06,600 INFO L226 Difference]: Without dead ends: 7282 [2021-02-19 19:29:06,600 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:29:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7282 states. [2021-02-19 19:29:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7282 to 3380. [2021-02-19 19:29:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 3379 states have (on average 3.55696951760876) internal successors, (12019), 3379 states have internal predecessors, (12019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 12019 transitions. [2021-02-19 19:29:06,678 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 12019 transitions. Word has length 28 [2021-02-19 19:29:06,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:06,678 INFO L480 AbstractCegarLoop]: Abstraction has 3380 states and 12019 transitions. [2021-02-19 19:29:06,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-02-19 19:29:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 12019 transitions. [2021-02-19 19:29:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:06,682 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:06,682 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:06,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:06,883 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:06,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:06,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 68 times [2021-02-19 19:29:06,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:06,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420924136] [2021-02-19 19:29:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:06,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420924136] [2021-02-19 19:29:06,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502051797] [2021-02-19 19:29:06,945 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 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 [2021-02-19 19:29:06,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:29:06,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:06,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:07,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:07,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 19:29:07,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991553245] [2021-02-19 19:29:07,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:29:07,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:29:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:29:07,171 INFO L87 Difference]: Start difference. First operand 3380 states and 12019 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-02-19 19:29:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:08,728 INFO L93 Difference]: Finished difference Result 7572 states and 24258 transitions. [2021-02-19 19:29:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 19:29:08,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:08,742 INFO L225 Difference]: With dead ends: 7572 [2021-02-19 19:29:08,742 INFO L226 Difference]: Without dead ends: 7572 [2021-02-19 19:29:08,742 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:29:08,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7572 states. [2021-02-19 19:29:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7572 to 3510. [2021-02-19 19:29:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 3509 states have (on average 3.541179823311485) internal successors, (12426), 3509 states have internal predecessors, (12426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 12426 transitions. [2021-02-19 19:29:08,823 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 12426 transitions. Word has length 28 [2021-02-19 19:29:08,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:08,823 INFO L480 AbstractCegarLoop]: Abstraction has 3510 states and 12426 transitions. [2021-02-19 19:29:08,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-02-19 19:29:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 12426 transitions. [2021-02-19 19:29:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:08,828 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:08,828 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:09,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-02-19 19:29:09,029 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 69 times [2021-02-19 19:29:09,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:09,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568231380] [2021-02-19 19:29:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:09,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568231380] [2021-02-19 19:29:09,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9967711] [2021-02-19 19:29:09,107 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 [2021-02-19 19:29:09,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:29:09,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:29:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:09,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:09,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 19:29:09,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647058984] [2021-02-19 19:29:09,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:29:09,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:09,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:29:09,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:29:09,298 INFO L87 Difference]: Start difference. First operand 3510 states and 12426 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:10,557 INFO L93 Difference]: Finished difference Result 8046 states and 25803 transitions. [2021-02-19 19:29:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:29:10,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:10,572 INFO L225 Difference]: With dead ends: 8046 [2021-02-19 19:29:10,572 INFO L226 Difference]: Without dead ends: 8033 [2021-02-19 19:29:10,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:29:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2021-02-19 19:29:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 4155. [2021-02-19 19:29:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4155 states, 4154 states have (on average 3.5825710158883006) internal successors, (14882), 4154 states have internal predecessors, (14882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 14882 transitions. [2021-02-19 19:29:10,664 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 14882 transitions. Word has length 28 [2021-02-19 19:29:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:10,664 INFO L480 AbstractCegarLoop]: Abstraction has 4155 states and 14882 transitions. [2021-02-19 19:29:10,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 14882 transitions. [2021-02-19 19:29:10,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:10,670 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:10,670 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:10,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:10,870 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:10,870 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 70 times [2021-02-19 19:29:10,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:10,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256407123] [2021-02-19 19:29:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:10,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256407123] [2021-02-19 19:29:10,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354482875] [2021-02-19 19:29:10,958 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 [2021-02-19 19:29:10,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:29:10,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:10,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:29:10,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:11,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:11,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 19:29:11,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222943091] [2021-02-19 19:29:11,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:29:11,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:11,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:29:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:29:11,126 INFO L87 Difference]: Start difference. First operand 4155 states and 14882 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:12,363 INFO L93 Difference]: Finished difference Result 8303 states and 26514 transitions. [2021-02-19 19:29:12,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:29:12,365 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:12,379 INFO L225 Difference]: With dead ends: 8303 [2021-02-19 19:29:12,379 INFO L226 Difference]: Without dead ends: 8303 [2021-02-19 19:29:12,380 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:29:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8303 states. [2021-02-19 19:29:12,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8303 to 3908. [2021-02-19 19:29:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 3.5487586383414382) internal successors, (13865), 3907 states have internal predecessors, (13865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 13865 transitions. [2021-02-19 19:29:12,468 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 13865 transitions. Word has length 28 [2021-02-19 19:29:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:12,468 INFO L480 AbstractCegarLoop]: Abstraction has 3908 states and 13865 transitions. [2021-02-19 19:29:12,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:12,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 13865 transitions. [2021-02-19 19:29:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:12,473 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:12,473 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:12,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:12,674 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:12,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 71 times [2021-02-19 19:29:12,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:12,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307018594] [2021-02-19 19:29:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:12,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307018594] [2021-02-19 19:29:12,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931540065] [2021-02-19 19:29:12,762 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 [2021-02-19 19:29:12,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:29:12,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:12,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:12,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:12,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 19:29:12,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508804974] [2021-02-19 19:29:12,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:29:12,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:12,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:29:12,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:29:12,935 INFO L87 Difference]: Start difference. First operand 3908 states and 13865 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-02-19 19:29:14,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:14,407 INFO L93 Difference]: Finished difference Result 7415 states and 24352 transitions. [2021-02-19 19:29:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 19:29:14,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:14,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:14,422 INFO L225 Difference]: With dead ends: 7415 [2021-02-19 19:29:14,422 INFO L226 Difference]: Without dead ends: 7411 [2021-02-19 19:29:14,422 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 19:29:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-02-19 19:29:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 3541. [2021-02-19 19:29:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3540 states have (on average 3.592937853107345) internal successors, (12719), 3540 states have internal predecessors, (12719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 12719 transitions. [2021-02-19 19:29:14,507 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 12719 transitions. Word has length 28 [2021-02-19 19:29:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:14,507 INFO L480 AbstractCegarLoop]: Abstraction has 3541 states and 12719 transitions. [2021-02-19 19:29:14,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-02-19 19:29:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 12719 transitions. [2021-02-19 19:29:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:14,531 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:14,531 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:14,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:14,732 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:14,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 72 times [2021-02-19 19:29:14,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:14,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456936177] [2021-02-19 19:29:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:14,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456936177] [2021-02-19 19:29:14,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538310770] [2021-02-19 19:29:14,807 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 [2021-02-19 19:29:14,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:29:14,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:14,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:14,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:15,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:15,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 19:29:15,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308696012] [2021-02-19 19:29:15,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:29:15,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:15,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:29:15,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:29:15,027 INFO L87 Difference]: Start difference. First operand 3541 states and 12719 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:17,346 INFO L93 Difference]: Finished difference Result 11694 states and 38643 transitions. [2021-02-19 19:29:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 19:29:17,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:17,370 INFO L225 Difference]: With dead ends: 11694 [2021-02-19 19:29:17,370 INFO L226 Difference]: Without dead ends: 11694 [2021-02-19 19:29:17,370 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:29:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11694 states. [2021-02-19 19:29:17,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11694 to 3835. [2021-02-19 19:29:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 3.6739697443922794) internal successors, (14086), 3834 states have internal predecessors, (14086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 14086 transitions. [2021-02-19 19:29:17,485 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 14086 transitions. Word has length 28 [2021-02-19 19:29:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:17,486 INFO L480 AbstractCegarLoop]: Abstraction has 3835 states and 14086 transitions. [2021-02-19 19:29:17,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 14086 transitions. [2021-02-19 19:29:17,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:17,491 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:17,491 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:17,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:17,691 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:17,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:17,692 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 73 times [2021-02-19 19:29:17,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:17,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122294086] [2021-02-19 19:29:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:17,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122294086] [2021-02-19 19:29:17,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488058364] [2021-02-19 19:29:17,770 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 [2021-02-19 19:29:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:17,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:18,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:18,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 19:29:18,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347757626] [2021-02-19 19:29:18,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:29:18,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:18,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:29:18,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:29:18,037 INFO L87 Difference]: Start difference. First operand 3835 states and 14086 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:20,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:20,307 INFO L93 Difference]: Finished difference Result 11388 states and 37826 transitions. [2021-02-19 19:29:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 19:29:20,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:20,328 INFO L225 Difference]: With dead ends: 11388 [2021-02-19 19:29:20,329 INFO L226 Difference]: Without dead ends: 11388 [2021-02-19 19:29:20,329 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:29:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11388 states. [2021-02-19 19:29:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11388 to 3783. [2021-02-19 19:29:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 3.6533580116340563) internal successors, (13817), 3782 states have internal predecessors, (13817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 13817 transitions. [2021-02-19 19:29:20,443 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 13817 transitions. Word has length 28 [2021-02-19 19:29:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:20,443 INFO L480 AbstractCegarLoop]: Abstraction has 3783 states and 13817 transitions. [2021-02-19 19:29:20,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 13817 transitions. [2021-02-19 19:29:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:20,448 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:20,448 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:20,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:20,649 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 74 times [2021-02-19 19:29:20,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:20,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197343622] [2021-02-19 19:29:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:20,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197343622] [2021-02-19 19:29:20,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768367173] [2021-02-19 19:29:20,724 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 [2021-02-19 19:29:20,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:29:20,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:20,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:20,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:20,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 19:29:20,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525229399] [2021-02-19 19:29:20,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:29:20,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:20,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:29:20,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:29:20,975 INFO L87 Difference]: Start difference. First operand 3783 states and 13817 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:23,224 INFO L93 Difference]: Finished difference Result 10708 states and 34392 transitions. [2021-02-19 19:29:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 19:29:23,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:23,244 INFO L225 Difference]: With dead ends: 10708 [2021-02-19 19:29:23,244 INFO L226 Difference]: Without dead ends: 10708 [2021-02-19 19:29:23,244 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:29:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2021-02-19 19:29:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 3823. [2021-02-19 19:29:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 3.6575091575091574) internal successors, (13979), 3822 states have internal predecessors, (13979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 13979 transitions. [2021-02-19 19:29:23,370 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 13979 transitions. Word has length 28 [2021-02-19 19:29:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:23,370 INFO L480 AbstractCegarLoop]: Abstraction has 3823 states and 13979 transitions. [2021-02-19 19:29:23,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 13979 transitions. [2021-02-19 19:29:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:23,375 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:23,375 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:23,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-02-19 19:29:23,575 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 75 times [2021-02-19 19:29:23,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:23,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55923876] [2021-02-19 19:29:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:23,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55923876] [2021-02-19 19:29:23,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311116318] [2021-02-19 19:29:23,677 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 [2021-02-19 19:29:23,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:29:23,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:23,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:23,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:23,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 19:29:23,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602954218] [2021-02-19 19:29:23,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:29:23,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:29:23,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:29:23,903 INFO L87 Difference]: Start difference. First operand 3823 states and 13979 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:26,000 INFO L93 Difference]: Finished difference Result 10094 states and 32884 transitions. [2021-02-19 19:29:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 19:29:26,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:26,018 INFO L225 Difference]: With dead ends: 10094 [2021-02-19 19:29:26,018 INFO L226 Difference]: Without dead ends: 10086 [2021-02-19 19:29:26,018 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:29:26,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2021-02-19 19:29:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 3789. [2021-02-19 19:29:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 3.6525871172122493) internal successors, (13836), 3788 states have internal predecessors, (13836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 13836 transitions. [2021-02-19 19:29:26,116 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 13836 transitions. Word has length 28 [2021-02-19 19:29:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:26,116 INFO L480 AbstractCegarLoop]: Abstraction has 3789 states and 13836 transitions. [2021-02-19 19:29:26,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 13836 transitions. [2021-02-19 19:29:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:26,121 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:26,121 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:26,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-02-19 19:29:26,322 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:26,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:26,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 76 times [2021-02-19 19:29:26,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:26,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564599691] [2021-02-19 19:29:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:26,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564599691] [2021-02-19 19:29:26,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746126167] [2021-02-19 19:29:26,386 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 [2021-02-19 19:29:26,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:29:26,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:26,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:26,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:26,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:26,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 19:29:26,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999710077] [2021-02-19 19:29:26,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:29:26,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:26,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:29:26,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:29:26,626 INFO L87 Difference]: Start difference. First operand 3789 states and 13836 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:28,998 INFO L93 Difference]: Finished difference Result 9696 states and 31774 transitions. [2021-02-19 19:29:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 19:29:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:29,016 INFO L225 Difference]: With dead ends: 9696 [2021-02-19 19:29:29,016 INFO L226 Difference]: Without dead ends: 9696 [2021-02-19 19:29:29,017 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:29:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9696 states. [2021-02-19 19:29:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9696 to 3805. [2021-02-19 19:29:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3805 states, 3804 states have (on average 3.654048370136698) internal successors, (13900), 3804 states have internal predecessors, (13900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3805 states to 3805 states and 13900 transitions. [2021-02-19 19:29:29,117 INFO L78 Accepts]: Start accepts. Automaton has 3805 states and 13900 transitions. Word has length 28 [2021-02-19 19:29:29,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:29,117 INFO L480 AbstractCegarLoop]: Abstraction has 3805 states and 13900 transitions. [2021-02-19 19:29:29,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3805 states and 13900 transitions. [2021-02-19 19:29:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:29,122 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:29,122 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:29,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-02-19 19:29:29,322 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:29,322 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 77 times [2021-02-19 19:29:29,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:29,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548975505] [2021-02-19 19:29:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548975505] [2021-02-19 19:29:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81111853] [2021-02-19 19:29:29,404 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 [2021-02-19 19:29:29,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 19:29:29,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:29,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:29,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:29,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:29,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 19:29:29,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113627817] [2021-02-19 19:29:29,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:29:29,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:29,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:29:29,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:29:29,669 INFO L87 Difference]: Start difference. First operand 3805 states and 13900 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:31,909 INFO L93 Difference]: Finished difference Result 9361 states and 30979 transitions. [2021-02-19 19:29:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 19:29:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:31,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:31,927 INFO L225 Difference]: With dead ends: 9361 [2021-02-19 19:29:31,927 INFO L226 Difference]: Without dead ends: 9353 [2021-02-19 19:29:31,927 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:29:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9353 states. [2021-02-19 19:29:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9353 to 3473. [2021-02-19 19:29:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3473 states, 3472 states have (on average 3.5691244239631335) internal successors, (12392), 3472 states have internal predecessors, (12392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3473 states to 3473 states and 12392 transitions. [2021-02-19 19:29:32,033 INFO L78 Accepts]: Start accepts. Automaton has 3473 states and 12392 transitions. Word has length 28 [2021-02-19 19:29:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:32,033 INFO L480 AbstractCegarLoop]: Abstraction has 3473 states and 12392 transitions. [2021-02-19 19:29:32,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3473 states and 12392 transitions. [2021-02-19 19:29:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:32,038 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:32,039 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:32,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-02-19 19:29:32,246 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 78 times [2021-02-19 19:29:32,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:32,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907416426] [2021-02-19 19:29:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:32,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907416426] [2021-02-19 19:29:32,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905456257] [2021-02-19 19:29:32,335 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 [2021-02-19 19:29:32,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:29:32,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:32,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:32,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:32,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-02-19 19:29:32,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785301711] [2021-02-19 19:29:32,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:29:32,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:32,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:29:32,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:29:32,590 INFO L87 Difference]: Start difference. First operand 3473 states and 12392 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:34,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:34,686 INFO L93 Difference]: Finished difference Result 7144 states and 23381 transitions. [2021-02-19 19:29:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 19:29:34,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:34,701 INFO L225 Difference]: With dead ends: 7144 [2021-02-19 19:29:34,701 INFO L226 Difference]: Without dead ends: 7144 [2021-02-19 19:29:34,701 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:29:34,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-02-19 19:29:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 3485. [2021-02-19 19:29:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3485 states, 3484 states have (on average 3.5677382319173363) internal successors, (12430), 3484 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 12430 transitions. [2021-02-19 19:29:34,804 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 12430 transitions. Word has length 28 [2021-02-19 19:29:34,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:34,804 INFO L480 AbstractCegarLoop]: Abstraction has 3485 states and 12430 transitions. [2021-02-19 19:29:34,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 12430 transitions. [2021-02-19 19:29:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:34,808 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:34,808 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:35,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:35,008 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 79 times [2021-02-19 19:29:35,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:35,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757270941] [2021-02-19 19:29:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:35,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757270941] [2021-02-19 19:29:35,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748155185] [2021-02-19 19:29:35,112 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 [2021-02-19 19:29:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:35,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:35,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:35,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 19:29:35,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438115237] [2021-02-19 19:29:35,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:29:35,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:29:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:29:35,474 INFO L87 Difference]: Start difference. First operand 3485 states and 12430 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:38,125 INFO L93 Difference]: Finished difference Result 8072 states and 25770 transitions. [2021-02-19 19:29:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 19:29:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:38,139 INFO L225 Difference]: With dead ends: 8072 [2021-02-19 19:29:38,139 INFO L226 Difference]: Without dead ends: 8072 [2021-02-19 19:29:38,139 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 19:29:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8072 states. [2021-02-19 19:29:38,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8072 to 3551. [2021-02-19 19:29:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 3.5625352112676056) internal successors, (12647), 3550 states have internal predecessors, (12647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 12647 transitions. [2021-02-19 19:29:38,220 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 12647 transitions. Word has length 28 [2021-02-19 19:29:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:38,220 INFO L480 AbstractCegarLoop]: Abstraction has 3551 states and 12647 transitions. [2021-02-19 19:29:38,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 12647 transitions. [2021-02-19 19:29:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:38,225 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:38,225 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:38,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-02-19 19:29:38,425 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:38,426 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 80 times [2021-02-19 19:29:38,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:38,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367136008] [2021-02-19 19:29:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:38,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367136008] [2021-02-19 19:29:38,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911171093] [2021-02-19 19:29:38,514 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 [2021-02-19 19:29:38,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:29:38,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:38,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:38,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:38,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 19:29:38,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19015568] [2021-02-19 19:29:38,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:29:38,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:29:38,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:29:38,829 INFO L87 Difference]: Start difference. First operand 3551 states and 12647 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:41,331 INFO L93 Difference]: Finished difference Result 7455 states and 24142 transitions. [2021-02-19 19:29:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 19:29:41,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:41,346 INFO L225 Difference]: With dead ends: 7455 [2021-02-19 19:29:41,346 INFO L226 Difference]: Without dead ends: 7451 [2021-02-19 19:29:41,346 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 19:29:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-02-19 19:29:41,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 3486. [2021-02-19 19:29:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 3.5604017216642756) internal successors, (12408), 3485 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 12408 transitions. [2021-02-19 19:29:41,424 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 12408 transitions. Word has length 28 [2021-02-19 19:29:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:41,424 INFO L480 AbstractCegarLoop]: Abstraction has 3486 states and 12408 transitions. [2021-02-19 19:29:41,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 12408 transitions. [2021-02-19 19:29:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:41,429 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:41,429 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:41,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:41,630 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 68 times [2021-02-19 19:29:41,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:41,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762166915] [2021-02-19 19:29:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:41,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762166915] [2021-02-19 19:29:41,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146564158] [2021-02-19 19:29:41,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:41,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:29:41,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:41,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:42,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:42,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-02-19 19:29:42,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220710256] [2021-02-19 19:29:42,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:29:42,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:42,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:29:42,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:29:42,012 INFO L87 Difference]: Start difference. First operand 3486 states and 12408 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:43,458 INFO L93 Difference]: Finished difference Result 6598 states and 21730 transitions. [2021-02-19 19:29:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:29:43,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:43,468 INFO L225 Difference]: With dead ends: 6598 [2021-02-19 19:29:43,468 INFO L226 Difference]: Without dead ends: 6598 [2021-02-19 19:29:43,469 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:29:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-02-19 19:29:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 3490. [2021-02-19 19:29:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3490 states, 3489 states have (on average 3.5620521639438234) internal successors, (12428), 3489 states have internal predecessors, (12428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 12428 transitions. [2021-02-19 19:29:43,531 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 12428 transitions. Word has length 28 [2021-02-19 19:29:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:43,531 INFO L480 AbstractCegarLoop]: Abstraction has 3490 states and 12428 transitions. [2021-02-19 19:29:43,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 12428 transitions. [2021-02-19 19:29:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:43,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:43,536 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:43,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:43,751 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:43,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 69 times [2021-02-19 19:29:43,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:43,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373723707] [2021-02-19 19:29:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:43,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373723707] [2021-02-19 19:29:43,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334147928] [2021-02-19 19:29:43,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:43,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:29:43,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:43,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:43,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:44,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:44,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-02-19 19:29:44,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705365255] [2021-02-19 19:29:44,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:29:44,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:44,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:29:44,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:29:44,117 INFO L87 Difference]: Start difference. First operand 3490 states and 12428 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:46,031 INFO L93 Difference]: Finished difference Result 7075 states and 23060 transitions. [2021-02-19 19:29:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 19:29:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:46,045 INFO L225 Difference]: With dead ends: 7075 [2021-02-19 19:29:46,045 INFO L226 Difference]: Without dead ends: 7075 [2021-02-19 19:29:46,045 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 19:29:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2021-02-19 19:29:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 3504. [2021-02-19 19:29:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3504 states, 3503 states have (on average 3.55952041107622) internal successors, (12469), 3503 states have internal predecessors, (12469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 12469 transitions. [2021-02-19 19:29:46,123 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 12469 transitions. Word has length 28 [2021-02-19 19:29:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:46,123 INFO L480 AbstractCegarLoop]: Abstraction has 3504 states and 12469 transitions. [2021-02-19 19:29:46,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 12469 transitions. [2021-02-19 19:29:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:46,128 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:46,128 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:46,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable395 [2021-02-19 19:29:46,328 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:46,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 70 times [2021-02-19 19:29:46,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:46,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215379185] [2021-02-19 19:29:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:46,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215379185] [2021-02-19 19:29:46,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533017475] [2021-02-19 19:29:46,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:29:46,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:29:46,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:46,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:46,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:46,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-02-19 19:29:46,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764184856] [2021-02-19 19:29:46,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:29:46,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:46,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:29:46,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:29:46,679 INFO L87 Difference]: Start difference. First operand 3504 states and 12469 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:49,003 INFO L93 Difference]: Finished difference Result 7577 states and 24482 transitions. [2021-02-19 19:29:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 19:29:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:49,017 INFO L225 Difference]: With dead ends: 7577 [2021-02-19 19:29:49,017 INFO L226 Difference]: Without dead ends: 7577 [2021-02-19 19:29:49,017 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:29:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7577 states. [2021-02-19 19:29:49,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7577 to 3584. [2021-02-19 19:29:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 3.553167736533631) internal successors, (12731), 3583 states have internal predecessors, (12731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 12731 transitions. [2021-02-19 19:29:49,099 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 12731 transitions. Word has length 28 [2021-02-19 19:29:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:49,099 INFO L480 AbstractCegarLoop]: Abstraction has 3584 states and 12731 transitions. [2021-02-19 19:29:49,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 12731 transitions. [2021-02-19 19:29:49,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:49,103 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:49,103 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:49,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:49,304 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:49,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 71 times [2021-02-19 19:29:49,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:49,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550087386] [2021-02-19 19:29:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:49,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550087386] [2021-02-19 19:29:49,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161456907] [2021-02-19 19:29:49,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:49,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:29:49,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:49,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:49,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:49,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 19:29:49,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353040351] [2021-02-19 19:29:49,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:29:49,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:49,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:29:49,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:29:49,762 INFO L87 Difference]: Start difference. First operand 3584 states and 12731 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:51,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:51,344 INFO L93 Difference]: Finished difference Result 7399 states and 25292 transitions. [2021-02-19 19:29:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 19:29:51,346 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:51,358 INFO L225 Difference]: With dead ends: 7399 [2021-02-19 19:29:51,359 INFO L226 Difference]: Without dead ends: 7399 [2021-02-19 19:29:51,359 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:29:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-02-19 19:29:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4698. [2021-02-19 19:29:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4697 states have (on average 3.670640834575261) internal successors, (17241), 4697 states have internal predecessors, (17241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 17241 transitions. [2021-02-19 19:29:51,441 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 17241 transitions. Word has length 28 [2021-02-19 19:29:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:51,441 INFO L480 AbstractCegarLoop]: Abstraction has 4698 states and 17241 transitions. [2021-02-19 19:29:51,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 17241 transitions. [2021-02-19 19:29:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:51,447 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:51,447 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:51,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-02-19 19:29:51,647 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 72 times [2021-02-19 19:29:51,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:51,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008897360] [2021-02-19 19:29:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:51,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008897360] [2021-02-19 19:29:51,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459331308] [2021-02-19 19:29:51,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:51,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 19:29:51,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:51,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:29:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:52,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:52,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-02-19 19:29:52,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843353927] [2021-02-19 19:29:52,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:29:52,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:52,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:29:52,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:29:52,035 INFO L87 Difference]: Start difference. First operand 4698 states and 17241 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:54,201 INFO L93 Difference]: Finished difference Result 8486 states and 29025 transitions. [2021-02-19 19:29:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 19:29:54,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:54,217 INFO L225 Difference]: With dead ends: 8486 [2021-02-19 19:29:54,218 INFO L226 Difference]: Without dead ends: 8482 [2021-02-19 19:29:54,218 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:29:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8482 states. [2021-02-19 19:29:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8482 to 4590. [2021-02-19 19:29:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 4589 states have (on average 3.681194159947701) internal successors, (16893), 4589 states have internal predecessors, (16893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 16893 transitions. [2021-02-19 19:29:54,318 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 16893 transitions. Word has length 28 [2021-02-19 19:29:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:54,318 INFO L480 AbstractCegarLoop]: Abstraction has 4590 states and 16893 transitions. [2021-02-19 19:29:54,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 16893 transitions. [2021-02-19 19:29:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:54,324 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:54,324 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:54,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-02-19 19:29:54,525 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 81 times [2021-02-19 19:29:54,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:54,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245028510] [2021-02-19 19:29:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:54,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245028510] [2021-02-19 19:29:54,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130216675] [2021-02-19 19:29:54,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:29:54,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:29:54,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:29:54,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:54,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:54,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 19:29:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259835539] [2021-02-19 19:29:54,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:29:54,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:29:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:29:54,836 INFO L87 Difference]: Start difference. First operand 4590 states and 16893 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:57,275 INFO L93 Difference]: Finished difference Result 9661 states and 32689 transitions. [2021-02-19 19:29:57,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 19:29:57,277 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:29:57,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:57,294 INFO L225 Difference]: With dead ends: 9661 [2021-02-19 19:29:57,294 INFO L226 Difference]: Without dead ends: 9649 [2021-02-19 19:29:57,295 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:29:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9649 states. [2021-02-19 19:29:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9649 to 5069. [2021-02-19 19:29:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 5068 states have (on average 3.7624309392265194) internal successors, (19068), 5068 states have internal predecessors, (19068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 19068 transitions. [2021-02-19 19:29:57,406 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 19068 transitions. Word has length 28 [2021-02-19 19:29:57,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:57,406 INFO L480 AbstractCegarLoop]: Abstraction has 5069 states and 19068 transitions. [2021-02-19 19:29:57,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 19068 transitions. [2021-02-19 19:29:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:29:57,413 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:57,413 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:57,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-02-19 19:29:57,614 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:57,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:57,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 82 times [2021-02-19 19:29:57,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:57,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153671206] [2021-02-19 19:29:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:57,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153671206] [2021-02-19 19:29:57,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971613674] [2021-02-19 19:29:57,686 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 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 [2021-02-19 19:29:57,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:29:57,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:57,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:29:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:57,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:57,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 19:29:57,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541560583] [2021-02-19 19:29:57,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:29:57,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:57,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:29:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:29:57,953 INFO L87 Difference]: Start difference. First operand 5069 states and 19068 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:00,292 INFO L93 Difference]: Finished difference Result 9987 states and 33714 transitions. [2021-02-19 19:30:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 19:30:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:00,313 INFO L225 Difference]: With dead ends: 9987 [2021-02-19 19:30:00,313 INFO L226 Difference]: Without dead ends: 9987 [2021-02-19 19:30:00,313 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:30:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2021-02-19 19:30:00,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 5088. [2021-02-19 19:30:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 3.747198741891095) internal successors, (19062), 5087 states have internal predecessors, (19062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 19062 transitions. [2021-02-19 19:30:00,444 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 19062 transitions. Word has length 28 [2021-02-19 19:30:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:00,444 INFO L480 AbstractCegarLoop]: Abstraction has 5088 states and 19062 transitions. [2021-02-19 19:30:00,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 19062 transitions. [2021-02-19 19:30:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:00,451 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:00,451 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:00,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-02-19 19:30:00,652 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 83 times [2021-02-19 19:30:00,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:00,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145006124] [2021-02-19 19:30:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:00,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145006124] [2021-02-19 19:30:00,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287013493] [2021-02-19 19:30:00,752 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 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 [2021-02-19 19:30:00,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:30:00,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:30:00,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:01,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:01,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 19:30:01,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149311338] [2021-02-19 19:30:01,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:30:01,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:01,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:30:01,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:30:01,035 INFO L87 Difference]: Start difference. First operand 5088 states and 19062 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:02,349 INFO L93 Difference]: Finished difference Result 9427 states and 33610 transitions. [2021-02-19 19:30:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:30:02,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:02,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:02,377 INFO L225 Difference]: With dead ends: 9427 [2021-02-19 19:30:02,377 INFO L226 Difference]: Without dead ends: 9344 [2021-02-19 19:30:02,377 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:30:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2021-02-19 19:30:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 6514. [2021-02-19 19:30:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6514 states, 6513 states have (on average 3.792875786887763) internal successors, (24703), 6513 states have internal predecessors, (24703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6514 states to 6514 states and 24703 transitions. [2021-02-19 19:30:02,560 INFO L78 Accepts]: Start accepts. Automaton has 6514 states and 24703 transitions. Word has length 28 [2021-02-19 19:30:02,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:02,560 INFO L480 AbstractCegarLoop]: Abstraction has 6514 states and 24703 transitions. [2021-02-19 19:30:02,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:02,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6514 states and 24703 transitions. [2021-02-19 19:30:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:02,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:02,572 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:02,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:02,779 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 84 times [2021-02-19 19:30:02,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:02,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713206121] [2021-02-19 19:30:02,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:30:02,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713206121] [2021-02-19 19:30:02,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448393261] [2021-02-19 19:30:02,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:30:02,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:30:02,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:30:02,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:30:03,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:03,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-02-19 19:30:03,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181748816] [2021-02-19 19:30:03,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:30:03,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:30:03,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:30:03,047 INFO L87 Difference]: Start difference. First operand 6514 states and 24703 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:03,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:03,634 INFO L93 Difference]: Finished difference Result 8995 states and 31926 transitions. [2021-02-19 19:30:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:30:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:03,656 INFO L225 Difference]: With dead ends: 8995 [2021-02-19 19:30:03,656 INFO L226 Difference]: Without dead ends: 8995 [2021-02-19 19:30:03,656 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:30:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8995 states. [2021-02-19 19:30:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8995 to 6592. [2021-02-19 19:30:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6592 states, 6591 states have (on average 3.775147928994083) internal successors, (24882), 6591 states have internal predecessors, (24882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6592 states to 6592 states and 24882 transitions. [2021-02-19 19:30:03,801 INFO L78 Accepts]: Start accepts. Automaton has 6592 states and 24882 transitions. Word has length 28 [2021-02-19 19:30:03,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:03,801 INFO L480 AbstractCegarLoop]: Abstraction has 6592 states and 24882 transitions. [2021-02-19 19:30:03,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 6592 states and 24882 transitions. [2021-02-19 19:30:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:03,813 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:03,813 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:04,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-02-19 19:30:04,014 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:04,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:04,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 85 times [2021-02-19 19:30:04,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:04,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655604815] [2021-02-19 19:30:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:04,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655604815] [2021-02-19 19:30:04,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534409578] [2021-02-19 19:30:04,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:04,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:04,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:04,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:04,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-02-19 19:30:04,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656269873] [2021-02-19 19:30:04,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:30:04,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:04,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:30:04,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:30:04,400 INFO L87 Difference]: Start difference. First operand 6592 states and 24882 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:06,415 INFO L93 Difference]: Finished difference Result 13599 states and 47590 transitions. [2021-02-19 19:30:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 19:30:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:06,445 INFO L225 Difference]: With dead ends: 13599 [2021-02-19 19:30:06,445 INFO L226 Difference]: Without dead ends: 13599 [2021-02-19 19:30:06,446 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 19:30:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-02-19 19:30:06,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 7339. [2021-02-19 19:30:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7339 states, 7338 states have (on average 3.7848187517034613) internal successors, (27773), 7338 states have internal predecessors, (27773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7339 states to 7339 states and 27773 transitions. [2021-02-19 19:30:06,665 INFO L78 Accepts]: Start accepts. Automaton has 7339 states and 27773 transitions. Word has length 28 [2021-02-19 19:30:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:06,665 INFO L480 AbstractCegarLoop]: Abstraction has 7339 states and 27773 transitions. [2021-02-19 19:30:06,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:06,665 INFO L276 IsEmpty]: Start isEmpty. Operand 7339 states and 27773 transitions. [2021-02-19 19:30:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:06,677 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:06,677 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:06,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-02-19 19:30:06,878 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:06,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:06,878 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 86 times [2021-02-19 19:30:06,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:06,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033850010] [2021-02-19 19:30:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:06,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033850010] [2021-02-19 19:30:06,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266546696] [2021-02-19 19:30:06,988 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 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 [2021-02-19 19:30:07,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:30:07,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:07,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:07,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:07,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:07,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-02-19 19:30:07,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867053017] [2021-02-19 19:30:07,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:30:07,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:07,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:30:07,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:30:07,211 INFO L87 Difference]: Start difference. First operand 7339 states and 27773 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:09,226 INFO L93 Difference]: Finished difference Result 13806 states and 48326 transitions. [2021-02-19 19:30:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 19:30:09,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:09,261 INFO L225 Difference]: With dead ends: 13806 [2021-02-19 19:30:09,261 INFO L226 Difference]: Without dead ends: 13806 [2021-02-19 19:30:09,261 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:30:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13806 states. [2021-02-19 19:30:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13806 to 7615. [2021-02-19 19:30:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7615 states, 7614 states have (on average 3.7624113475177303) internal successors, (28647), 7614 states have internal predecessors, (28647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7615 states to 7615 states and 28647 transitions. [2021-02-19 19:30:09,444 INFO L78 Accepts]: Start accepts. Automaton has 7615 states and 28647 transitions. Word has length 28 [2021-02-19 19:30:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:09,444 INFO L480 AbstractCegarLoop]: Abstraction has 7615 states and 28647 transitions. [2021-02-19 19:30:09,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 7615 states and 28647 transitions. [2021-02-19 19:30:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:09,457 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:09,457 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:09,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-02-19 19:30:09,658 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash -191201267, now seen corresponding path program 87 times [2021-02-19 19:30:09,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:09,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082848717] [2021-02-19 19:30:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:09,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082848717] [2021-02-19 19:30:09,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314363380] [2021-02-19 19:30:09,737 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 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 [2021-02-19 19:30:09,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:30:09,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:09,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:30:09,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:09,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:09,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:30:09,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444506342] [2021-02-19 19:30:09,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:30:09,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:09,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:30:09,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:30:09,991 INFO L87 Difference]: Start difference. First operand 7615 states and 28647 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:11,108 INFO L93 Difference]: Finished difference Result 10174 states and 36808 transitions. [2021-02-19 19:30:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:30:11,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:11,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:11,131 INFO L225 Difference]: With dead ends: 10174 [2021-02-19 19:30:11,132 INFO L226 Difference]: Without dead ends: 10144 [2021-02-19 19:30:11,132 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:30:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10144 states. [2021-02-19 19:30:11,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10144 to 8441. [2021-02-19 19:30:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8441 states, 8440 states have (on average 3.784004739336493) internal successors, (31937), 8440 states have internal predecessors, (31937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8441 states to 8441 states and 31937 transitions. [2021-02-19 19:30:11,276 INFO L78 Accepts]: Start accepts. Automaton has 8441 states and 31937 transitions. Word has length 28 [2021-02-19 19:30:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:11,276 INFO L480 AbstractCegarLoop]: Abstraction has 8441 states and 31937 transitions. [2021-02-19 19:30:11,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:11,276 INFO L276 IsEmpty]: Start isEmpty. Operand 8441 states and 31937 transitions. [2021-02-19 19:30:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:11,288 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:11,288 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:11,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:11,488 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:11,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 88 times [2021-02-19 19:30:11,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:11,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981554488] [2021-02-19 19:30:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:30:11,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981554488] [2021-02-19 19:30:11,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096809703] [2021-02-19 19:30:11,580 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:11,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:30:11,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:11,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:30:11,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:30:11,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:11,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:30:11,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191194410] [2021-02-19 19:30:11,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:30:11,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:30:11,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:30:11,873 INFO L87 Difference]: Start difference. First operand 8441 states and 31937 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:12,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:12,901 INFO L93 Difference]: Finished difference Result 10739 states and 38679 transitions. [2021-02-19 19:30:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:30:12,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:12,964 INFO L225 Difference]: With dead ends: 10739 [2021-02-19 19:30:12,965 INFO L226 Difference]: Without dead ends: 10739 [2021-02-19 19:30:12,965 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:30:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10739 states. [2021-02-19 19:30:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10739 to 8481. [2021-02-19 19:30:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8481 states, 8480 states have (on average 3.780188679245283) internal successors, (32056), 8480 states have internal predecessors, (32056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8481 states to 8481 states and 32056 transitions. [2021-02-19 19:30:13,118 INFO L78 Accepts]: Start accepts. Automaton has 8481 states and 32056 transitions. Word has length 28 [2021-02-19 19:30:13,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:13,118 INFO L480 AbstractCegarLoop]: Abstraction has 8481 states and 32056 transitions. [2021-02-19 19:30:13,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 8481 states and 32056 transitions. [2021-02-19 19:30:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:13,131 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:13,131 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:13,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-02-19 19:30:13,331 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 89 times [2021-02-19 19:30:13,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:13,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528717701] [2021-02-19 19:30:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:30:13,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528717701] [2021-02-19 19:30:13,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377863128] [2021-02-19 19:30:13,407 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 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 [2021-02-19 19:30:13,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:30:13,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:13,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:13,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:30:13,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:13,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-02-19 19:30:13,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326015293] [2021-02-19 19:30:13,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:30:13,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:13,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:30:13,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:30:13,661 INFO L87 Difference]: Start difference. First operand 8481 states and 32056 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:15,570 INFO L93 Difference]: Finished difference Result 14480 states and 51566 transitions. [2021-02-19 19:30:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:30:15,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:15,609 INFO L225 Difference]: With dead ends: 14480 [2021-02-19 19:30:15,609 INFO L226 Difference]: Without dead ends: 14476 [2021-02-19 19:30:15,609 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:30:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14476 states. [2021-02-19 19:30:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14476 to 8379. [2021-02-19 19:30:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8379 states, 8378 states have (on average 3.784077345428503) internal successors, (31703), 8378 states have internal predecessors, (31703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8379 states to 8379 states and 31703 transitions. [2021-02-19 19:30:15,799 INFO L78 Accepts]: Start accepts. Automaton has 8379 states and 31703 transitions. Word has length 28 [2021-02-19 19:30:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:15,799 INFO L480 AbstractCegarLoop]: Abstraction has 8379 states and 31703 transitions. [2021-02-19 19:30:15,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 8379 states and 31703 transitions. [2021-02-19 19:30:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:15,810 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:15,810 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:16,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:16,011 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:16,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:16,011 INFO L82 PathProgramCache]: Analyzing trace with hash 795274241, now seen corresponding path program 90 times [2021-02-19 19:30:16,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:16,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191629701] [2021-02-19 19:30:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:16,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191629701] [2021-02-19 19:30:16,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623534394] [2021-02-19 19:30:16,120 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 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 [2021-02-19 19:30:16,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:30:16,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:16,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:30:16,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:16,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:16,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 19:30:16,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198636556] [2021-02-19 19:30:16,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:30:16,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:30:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:30:16,415 INFO L87 Difference]: Start difference. First operand 8379 states and 31703 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:17,835 INFO L93 Difference]: Finished difference Result 10968 states and 39522 transitions. [2021-02-19 19:30:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:30:17,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:17,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:17,860 INFO L225 Difference]: With dead ends: 10968 [2021-02-19 19:30:17,860 INFO L226 Difference]: Without dead ends: 10968 [2021-02-19 19:30:17,861 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:30:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10968 states. [2021-02-19 19:30:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10968 to 8298. [2021-02-19 19:30:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8298 states, 8297 states have (on average 3.779920453175847) internal successors, (31362), 8297 states have internal predecessors, (31362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8298 states to 8298 states and 31362 transitions. [2021-02-19 19:30:18,026 INFO L78 Accepts]: Start accepts. Automaton has 8298 states and 31362 transitions. Word has length 28 [2021-02-19 19:30:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:18,026 INFO L480 AbstractCegarLoop]: Abstraction has 8298 states and 31362 transitions. [2021-02-19 19:30:18,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand 8298 states and 31362 transitions. [2021-02-19 19:30:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:18,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:18,039 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:18,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:18,240 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:18,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 91 times [2021-02-19 19:30:18,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:18,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143820396] [2021-02-19 19:30:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:18,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143820396] [2021-02-19 19:30:18,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128028430] [2021-02-19 19:30:18,375 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 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 [2021-02-19 19:30:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:18,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:18,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:18,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:18,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-02-19 19:30:18,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308454707] [2021-02-19 19:30:18,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:30:18,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:18,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:30:18,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:30:18,641 INFO L87 Difference]: Start difference. First operand 8298 states and 31362 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:20,985 INFO L93 Difference]: Finished difference Result 14334 states and 50971 transitions. [2021-02-19 19:30:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 19:30:20,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:20,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:21,024 INFO L225 Difference]: With dead ends: 14334 [2021-02-19 19:30:21,024 INFO L226 Difference]: Without dead ends: 14322 [2021-02-19 19:30:21,024 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:30:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14322 states. [2021-02-19 19:30:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14322 to 8298. [2021-02-19 19:30:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8298 states, 8297 states have (on average 3.7794383512112812) internal successors, (31358), 8297 states have internal predecessors, (31358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8298 states to 8298 states and 31358 transitions. [2021-02-19 19:30:21,252 INFO L78 Accepts]: Start accepts. Automaton has 8298 states and 31358 transitions. Word has length 28 [2021-02-19 19:30:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:21,252 INFO L480 AbstractCegarLoop]: Abstraction has 8298 states and 31358 transitions. [2021-02-19 19:30:21,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8298 states and 31358 transitions. [2021-02-19 19:30:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:21,267 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:21,267 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:21,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:21,467 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:21,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:21,468 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 92 times [2021-02-19 19:30:21,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:21,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111431688] [2021-02-19 19:30:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:21,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111431688] [2021-02-19 19:30:21,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489999700] [2021-02-19 19:30:21,615 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 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 [2021-02-19 19:30:21,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:30:21,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:21,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:21,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:21,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-02-19 19:30:21,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301509879] [2021-02-19 19:30:21,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:30:21,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:21,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:30:21,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:30:21,843 INFO L87 Difference]: Start difference. First operand 8298 states and 31358 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:25,468 INFO L93 Difference]: Finished difference Result 22163 states and 77456 transitions. [2021-02-19 19:30:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 19:30:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:25,524 INFO L225 Difference]: With dead ends: 22163 [2021-02-19 19:30:25,524 INFO L226 Difference]: Without dead ends: 22163 [2021-02-19 19:30:25,525 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 19:30:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22163 states. [2021-02-19 19:30:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22163 to 11501. [2021-02-19 19:30:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11501 states, 11500 states have (on average 3.823391304347826) internal successors, (43969), 11500 states have internal predecessors, (43969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11501 states to 11501 states and 43969 transitions. [2021-02-19 19:30:25,945 INFO L78 Accepts]: Start accepts. Automaton has 11501 states and 43969 transitions. Word has length 28 [2021-02-19 19:30:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:25,946 INFO L480 AbstractCegarLoop]: Abstraction has 11501 states and 43969 transitions. [2021-02-19 19:30:25,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 11501 states and 43969 transitions. [2021-02-19 19:30:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:25,965 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:25,965 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:26,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-02-19 19:30:26,170 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:26,170 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 93 times [2021-02-19 19:30:26,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:26,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568760396] [2021-02-19 19:30:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:26,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568760396] [2021-02-19 19:30:26,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264844868] [2021-02-19 19:30:26,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:26,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:30:26,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:26,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:26,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:26,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-02-19 19:30:26,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209194428] [2021-02-19 19:30:26,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:30:26,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:26,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:30:26,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:30:26,656 INFO L87 Difference]: Start difference. First operand 11501 states and 43969 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:30,106 INFO L93 Difference]: Finished difference Result 21280 states and 75180 transitions. [2021-02-19 19:30:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 19:30:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:30,252 INFO L225 Difference]: With dead ends: 21280 [2021-02-19 19:30:30,252 INFO L226 Difference]: Without dead ends: 21268 [2021-02-19 19:30:30,252 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 19:30:30,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21268 states. [2021-02-19 19:30:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21268 to 11319. [2021-02-19 19:30:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11319 states, 11318 states have (on average 3.8294751722919242) internal successors, (43342), 11318 states have internal predecessors, (43342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11319 states to 11319 states and 43342 transitions. [2021-02-19 19:30:30,660 INFO L78 Accepts]: Start accepts. Automaton has 11319 states and 43342 transitions. Word has length 28 [2021-02-19 19:30:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:30,661 INFO L480 AbstractCegarLoop]: Abstraction has 11319 states and 43342 transitions. [2021-02-19 19:30:30,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 11319 states and 43342 transitions. [2021-02-19 19:30:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:30,681 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:30,681 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:30,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-02-19 19:30:30,890 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:30,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:30,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 94 times [2021-02-19 19:30:30,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:30,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248130963] [2021-02-19 19:30:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:31,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248130963] [2021-02-19 19:30:31,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566563234] [2021-02-19 19:30:31,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:31,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:30:31,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:31,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:31,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-02-19 19:30:31,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890494739] [2021-02-19 19:30:31,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:30:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:30:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:30:31,404 INFO L87 Difference]: Start difference. First operand 11319 states and 43342 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:34,767 INFO L93 Difference]: Finished difference Result 21148 states and 74587 transitions. [2021-02-19 19:30:34,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 19:30:34,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:34,816 INFO L225 Difference]: With dead ends: 21148 [2021-02-19 19:30:34,816 INFO L226 Difference]: Without dead ends: 21112 [2021-02-19 19:30:34,817 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 19:30:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21112 states. [2021-02-19 19:30:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21112 to 11367. [2021-02-19 19:30:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 3.8287876121766673) internal successors, (43518), 11366 states have internal predecessors, (43518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 43518 transitions. [2021-02-19 19:30:35,210 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 43518 transitions. Word has length 28 [2021-02-19 19:30:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:35,210 INFO L480 AbstractCegarLoop]: Abstraction has 11367 states and 43518 transitions. [2021-02-19 19:30:35,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 43518 transitions. [2021-02-19 19:30:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:35,229 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:35,229 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:35,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-02-19 19:30:35,430 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:35,430 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 95 times [2021-02-19 19:30:35,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:35,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407572269] [2021-02-19 19:30:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:35,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407572269] [2021-02-19 19:30:35,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794193955] [2021-02-19 19:30:35,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:35,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:30:35,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:35,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:35,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:35,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:35,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 19:30:35,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497605772] [2021-02-19 19:30:35,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:30:35,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:35,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:30:35,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:30:35,931 INFO L87 Difference]: Start difference. First operand 11367 states and 43518 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:40,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:40,605 INFO L93 Difference]: Finished difference Result 20893 states and 73940 transitions. [2021-02-19 19:30:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-02-19 19:30:40,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:40,654 INFO L225 Difference]: With dead ends: 20893 [2021-02-19 19:30:40,654 INFO L226 Difference]: Without dead ends: 20893 [2021-02-19 19:30:40,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 19:30:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20893 states. [2021-02-19 19:30:40,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20893 to 11559. [2021-02-19 19:30:41,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11559 states, 11558 states have (on average 3.8198650285516527) internal successors, (44150), 11558 states have internal predecessors, (44150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11559 states to 11559 states and 44150 transitions. [2021-02-19 19:30:41,046 INFO L78 Accepts]: Start accepts. Automaton has 11559 states and 44150 transitions. Word has length 28 [2021-02-19 19:30:41,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:41,046 INFO L480 AbstractCegarLoop]: Abstraction has 11559 states and 44150 transitions. [2021-02-19 19:30:41,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 11559 states and 44150 transitions. [2021-02-19 19:30:41,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:41,067 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:41,067 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:41,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:41,267 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:41,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:41,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 96 times [2021-02-19 19:30:41,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:41,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125235130] [2021-02-19 19:30:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:41,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125235130] [2021-02-19 19:30:41,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092698068] [2021-02-19 19:30:41,422 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 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 [2021-02-19 19:30:41,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 19:30:41,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:41,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:41,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:41,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:41,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 19:30:41,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947529071] [2021-02-19 19:30:41,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:30:41,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:30:41,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:30:41,906 INFO L87 Difference]: Start difference. First operand 11559 states and 44150 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:46,465 INFO L93 Difference]: Finished difference Result 20354 states and 72471 transitions. [2021-02-19 19:30:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 19:30:46,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:46,517 INFO L225 Difference]: With dead ends: 20354 [2021-02-19 19:30:46,517 INFO L226 Difference]: Without dead ends: 20342 [2021-02-19 19:30:46,517 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 19:30:46,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20342 states. [2021-02-19 19:30:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20342 to 11439. [2021-02-19 19:30:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11439 states, 11438 states have (on average 3.82374541003672) internal successors, (43736), 11438 states have internal predecessors, (43736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11439 states to 11439 states and 43736 transitions. [2021-02-19 19:30:46,913 INFO L78 Accepts]: Start accepts. Automaton has 11439 states and 43736 transitions. Word has length 28 [2021-02-19 19:30:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:46,913 INFO L480 AbstractCegarLoop]: Abstraction has 11439 states and 43736 transitions. [2021-02-19 19:30:46,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 11439 states and 43736 transitions. [2021-02-19 19:30:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:46,933 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:46,933 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:47,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-02-19 19:30:47,133 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:47,134 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 97 times [2021-02-19 19:30:47,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:47,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102998330] [2021-02-19 19:30:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:47,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102998330] [2021-02-19 19:30:47,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077498717] [2021-02-19 19:30:47,287 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 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 [2021-02-19 19:30:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:47,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:47,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 19:30:47,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911462851] [2021-02-19 19:30:47,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:30:47,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:47,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:30:47,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:30:47,664 INFO L87 Difference]: Start difference. First operand 11439 states and 43736 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:51,681 INFO L93 Difference]: Finished difference Result 19594 states and 70385 transitions. [2021-02-19 19:30:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 19:30:51,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:51,729 INFO L225 Difference]: With dead ends: 19594 [2021-02-19 19:30:51,729 INFO L226 Difference]: Without dead ends: 19558 [2021-02-19 19:30:51,729 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 19:30:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19558 states. [2021-02-19 19:30:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19558 to 11463. [2021-02-19 19:30:52,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11463 states, 11462 states have (on average 3.8227185482463795) internal successors, (43816), 11462 states have internal predecessors, (43816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11463 states to 11463 states and 43816 transitions. [2021-02-19 19:30:52,036 INFO L78 Accepts]: Start accepts. Automaton has 11463 states and 43816 transitions. Word has length 28 [2021-02-19 19:30:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:52,036 INFO L480 AbstractCegarLoop]: Abstraction has 11463 states and 43816 transitions. [2021-02-19 19:30:52,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 11463 states and 43816 transitions. [2021-02-19 19:30:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:52,056 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:52,056 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:52,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-02-19 19:30:52,257 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:52,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 98 times [2021-02-19 19:30:52,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:52,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724291031] [2021-02-19 19:30:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:30:52,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724291031] [2021-02-19 19:30:52,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945726611] [2021-02-19 19:30:52,404 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 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 [2021-02-19 19:30:52,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:30:52,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:52,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:52,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:53,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:53,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 19:30:53,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770857217] [2021-02-19 19:30:53,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:30:53,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:53,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:30:53,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:30:53,024 INFO L87 Difference]: Start difference. First operand 11463 states and 43816 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:57,809 INFO L93 Difference]: Finished difference Result 28614 states and 102274 transitions. [2021-02-19 19:30:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 19:30:57,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:30:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:57,891 INFO L225 Difference]: With dead ends: 28614 [2021-02-19 19:30:57,891 INFO L226 Difference]: Without dead ends: 28614 [2021-02-19 19:30:57,892 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 19:30:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28614 states. [2021-02-19 19:30:58,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28614 to 11815. [2021-02-19 19:30:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11815 states, 11814 states have (on average 3.849923819197562) internal successors, (45483), 11814 states have internal predecessors, (45483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11815 states to 11815 states and 45483 transitions. [2021-02-19 19:30:58,351 INFO L78 Accepts]: Start accepts. Automaton has 11815 states and 45483 transitions. Word has length 28 [2021-02-19 19:30:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:58,351 INFO L480 AbstractCegarLoop]: Abstraction has 11815 states and 45483 transitions. [2021-02-19 19:30:58,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:58,351 INFO L276 IsEmpty]: Start isEmpty. Operand 11815 states and 45483 transitions. [2021-02-19 19:30:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:30:58,372 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:58,372 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:58,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-02-19 19:30:58,573 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:58,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 99 times [2021-02-19 19:30:58,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:58,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156050771] [2021-02-19 19:30:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:30:58,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156050771] [2021-02-19 19:30:58,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321552869] [2021-02-19 19:30:58,705 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 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 [2021-02-19 19:30:58,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:30:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:58,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:30:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:59,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:59,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 19:30:59,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799923065] [2021-02-19 19:30:59,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:30:59,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:30:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:30:59,217 INFO L87 Difference]: Start difference. First operand 11815 states and 45483 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:03,507 INFO L93 Difference]: Finished difference Result 28073 states and 101070 transitions. [2021-02-19 19:31:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 19:31:03,510 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:03,585 INFO L225 Difference]: With dead ends: 28073 [2021-02-19 19:31:03,585 INFO L226 Difference]: Without dead ends: 28073 [2021-02-19 19:31:03,585 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 19:31:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28073 states. [2021-02-19 19:31:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28073 to 11705. [2021-02-19 19:31:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11705 states, 11704 states have (on average 3.8373205741626792) internal successors, (44912), 11704 states have internal predecessors, (44912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11705 states to 11705 states and 44912 transitions. [2021-02-19 19:31:04,041 INFO L78 Accepts]: Start accepts. Automaton has 11705 states and 44912 transitions. Word has length 28 [2021-02-19 19:31:04,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:04,041 INFO L480 AbstractCegarLoop]: Abstraction has 11705 states and 44912 transitions. [2021-02-19 19:31:04,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:04,041 INFO L276 IsEmpty]: Start isEmpty. Operand 11705 states and 44912 transitions. [2021-02-19 19:31:04,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:04,061 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:04,061 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:04,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:04,262 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:04,262 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 100 times [2021-02-19 19:31:04,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:04,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340437784] [2021-02-19 19:31:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:31:04,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340437784] [2021-02-19 19:31:04,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779585497] [2021-02-19 19:31:04,399 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 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 [2021-02-19 19:31:04,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:31:04,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:04,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:04,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:04,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:04,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-02-19 19:31:04,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218945099] [2021-02-19 19:31:04,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:31:04,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:04,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:31:04,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:31:04,859 INFO L87 Difference]: Start difference. First operand 11705 states and 44912 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-02-19 19:31:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:07,884 INFO L93 Difference]: Finished difference Result 22229 states and 80356 transitions. [2021-02-19 19:31:07,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 19:31:07,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:07,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:07,940 INFO L225 Difference]: With dead ends: 22229 [2021-02-19 19:31:07,941 INFO L226 Difference]: Without dead ends: 22229 [2021-02-19 19:31:07,941 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 19:31:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22229 states. [2021-02-19 19:31:08,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22229 to 11714. [2021-02-19 19:31:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11714 states, 11713 states have (on average 3.8363356953812002) internal successors, (44935), 11713 states have internal predecessors, (44935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11714 states to 11714 states and 44935 transitions. [2021-02-19 19:31:08,309 INFO L78 Accepts]: Start accepts. Automaton has 11714 states and 44935 transitions. Word has length 28 [2021-02-19 19:31:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:08,310 INFO L480 AbstractCegarLoop]: Abstraction has 11714 states and 44935 transitions. [2021-02-19 19:31:08,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-02-19 19:31:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 11714 states and 44935 transitions. [2021-02-19 19:31:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:08,329 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:08,329 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:08,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:08,529 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:08,530 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 101 times [2021-02-19 19:31:08,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:08,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471986992] [2021-02-19 19:31:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:31:08,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471986992] [2021-02-19 19:31:08,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038131617] [2021-02-19 19:31:08,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:31:08,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:31:08,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:08,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:09,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:09,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-02-19 19:31:09,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058995253] [2021-02-19 19:31:09,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:31:09,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:31:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:31:09,124 INFO L87 Difference]: Start difference. First operand 11714 states and 44935 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:12,041 INFO L93 Difference]: Finished difference Result 20588 states and 75116 transitions. [2021-02-19 19:31:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 19:31:12,045 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:12,097 INFO L225 Difference]: With dead ends: 20588 [2021-02-19 19:31:12,097 INFO L226 Difference]: Without dead ends: 20588 [2021-02-19 19:31:12,097 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:31:12,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20588 states. [2021-02-19 19:31:12,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20588 to 11726. [2021-02-19 19:31:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11726 states, 11725 states have (on average 3.8356503198294245) internal successors, (44973), 11725 states have internal predecessors, (44973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11726 states to 11726 states and 44973 transitions. [2021-02-19 19:31:12,455 INFO L78 Accepts]: Start accepts. Automaton has 11726 states and 44973 transitions. Word has length 28 [2021-02-19 19:31:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:12,455 INFO L480 AbstractCegarLoop]: Abstraction has 11726 states and 44973 transitions. [2021-02-19 19:31:12,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 11726 states and 44973 transitions. [2021-02-19 19:31:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:12,477 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:12,477 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:12,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:12,677 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:12,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:12,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 102 times [2021-02-19 19:31:12,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:12,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704596756] [2021-02-19 19:31:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:31:12,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704596756] [2021-02-19 19:31:12,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690452294] [2021-02-19 19:31:12,829 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 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 [2021-02-19 19:31:12,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:31:12,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:13,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:13,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 19:31:13,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121085704] [2021-02-19 19:31:13,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:31:13,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:13,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:31:13,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:31:13,390 INFO L87 Difference]: Start difference. First operand 11726 states and 44973 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:17,498 INFO L93 Difference]: Finished difference Result 21371 states and 77353 transitions. [2021-02-19 19:31:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 19:31:17,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:17,553 INFO L225 Difference]: With dead ends: 21371 [2021-02-19 19:31:17,553 INFO L226 Difference]: Without dead ends: 21371 [2021-02-19 19:31:17,553 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 19:31:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21371 states. [2021-02-19 19:31:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21371 to 11834. [2021-02-19 19:31:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11834 states, 11833 states have (on average 3.828868418828699) internal successors, (45307), 11833 states have internal predecessors, (45307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11834 states to 11834 states and 45307 transitions. [2021-02-19 19:31:17,908 INFO L78 Accepts]: Start accepts. Automaton has 11834 states and 45307 transitions. Word has length 28 [2021-02-19 19:31:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:17,908 INFO L480 AbstractCegarLoop]: Abstraction has 11834 states and 45307 transitions. [2021-02-19 19:31:17,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 11834 states and 45307 transitions. [2021-02-19 19:31:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:17,928 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:17,928 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:18,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-02-19 19:31:18,128 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:18,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 103 times [2021-02-19 19:31:18,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:18,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966267583] [2021-02-19 19:31:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:31:18,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966267583] [2021-02-19 19:31:18,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144132918] [2021-02-19 19:31:18,265 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 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 [2021-02-19 19:31:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:18,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:18,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:18,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:18,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 19:31:18,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593086361] [2021-02-19 19:31:18,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:31:18,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:18,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:31:18,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:31:18,740 INFO L87 Difference]: Start difference. First operand 11834 states and 45307 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:22,082 INFO L93 Difference]: Finished difference Result 20752 states and 75649 transitions. [2021-02-19 19:31:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 19:31:22,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:22,137 INFO L225 Difference]: With dead ends: 20752 [2021-02-19 19:31:22,137 INFO L226 Difference]: Without dead ends: 20748 [2021-02-19 19:31:22,137 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:31:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20748 states. [2021-02-19 19:31:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20748 to 11760. [2021-02-19 19:31:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11760 states, 11759 states have (on average 3.8326388298324687) internal successors, (45068), 11759 states have internal predecessors, (45068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11760 states to 11760 states and 45068 transitions. [2021-02-19 19:31:22,519 INFO L78 Accepts]: Start accepts. Automaton has 11760 states and 45068 transitions. Word has length 28 [2021-02-19 19:31:22,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:22,519 INFO L480 AbstractCegarLoop]: Abstraction has 11760 states and 45068 transitions. [2021-02-19 19:31:22,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:22,519 INFO L276 IsEmpty]: Start isEmpty. Operand 11760 states and 45068 transitions. [2021-02-19 19:31:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:22,541 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:22,542 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:22,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-02-19 19:31:22,742 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:22,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:22,742 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 104 times [2021-02-19 19:31:22,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:22,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881167606] [2021-02-19 19:31:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:22,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881167606] [2021-02-19 19:31:22,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360379999] [2021-02-19 19:31:22,900 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 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 [2021-02-19 19:31:22,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:31:22,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:22,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:22,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:23,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:23,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:31:23,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672577209] [2021-02-19 19:31:23,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:31:23,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:23,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:31:23,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:31:23,371 INFO L87 Difference]: Start difference. First operand 11760 states and 45068 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:27,288 INFO L93 Difference]: Finished difference Result 20057 states and 72414 transitions. [2021-02-19 19:31:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 19:31:27,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:27,337 INFO L225 Difference]: With dead ends: 20057 [2021-02-19 19:31:27,337 INFO L226 Difference]: Without dead ends: 20057 [2021-02-19 19:31:27,338 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 19:31:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20057 states. [2021-02-19 19:31:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20057 to 11987. [2021-02-19 19:31:27,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11987 states, 11986 states have (on average 3.8349741364925745) internal successors, (45966), 11986 states have internal predecessors, (45966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11987 states to 11987 states and 45966 transitions. [2021-02-19 19:31:27,682 INFO L78 Accepts]: Start accepts. Automaton has 11987 states and 45966 transitions. Word has length 28 [2021-02-19 19:31:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:27,682 INFO L480 AbstractCegarLoop]: Abstraction has 11987 states and 45966 transitions. [2021-02-19 19:31:27,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 11987 states and 45966 transitions. [2021-02-19 19:31:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:27,703 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:27,703 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:27,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-02-19 19:31:27,903 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:27,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 105 times [2021-02-19 19:31:27,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:27,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638136262] [2021-02-19 19:31:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:28,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638136262] [2021-02-19 19:31:28,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728258980] [2021-02-19 19:31:28,007 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 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 [2021-02-19 19:31:28,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 19:31:28,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:28,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:28,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:28,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:28,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:31:28,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429179942] [2021-02-19 19:31:28,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:31:28,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:28,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:31:28,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:31:28,484 INFO L87 Difference]: Start difference. First operand 11987 states and 45966 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:32,300 INFO L93 Difference]: Finished difference Result 19588 states and 71123 transitions. [2021-02-19 19:31:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 19:31:32,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:32,353 INFO L225 Difference]: With dead ends: 19588 [2021-02-19 19:31:32,354 INFO L226 Difference]: Without dead ends: 19576 [2021-02-19 19:31:32,354 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 19:31:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19576 states. [2021-02-19 19:31:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19576 to 12089. [2021-02-19 19:31:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12089 states, 12088 states have (on average 3.8293348775645266) internal successors, (46289), 12088 states have internal predecessors, (46289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12089 states to 12089 states and 46289 transitions. [2021-02-19 19:31:32,641 INFO L78 Accepts]: Start accepts. Automaton has 12089 states and 46289 transitions. Word has length 28 [2021-02-19 19:31:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:32,641 INFO L480 AbstractCegarLoop]: Abstraction has 12089 states and 46289 transitions. [2021-02-19 19:31:32,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 12089 states and 46289 transitions. [2021-02-19 19:31:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:32,663 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:32,663 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:32,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-02-19 19:31:32,863 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:32,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:32,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 73 times [2021-02-19 19:31:32,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:32,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280316611] [2021-02-19 19:31:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:33,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280316611] [2021-02-19 19:31:33,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635081594] [2021-02-19 19:31:33,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:31:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:33,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:33,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:33,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-02-19 19:31:33,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750907294] [2021-02-19 19:31:33,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:31:33,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:33,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:31:33,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:31:33,439 INFO L87 Difference]: Start difference. First operand 12089 states and 46289 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:35,202 INFO L93 Difference]: Finished difference Result 17007 states and 63216 transitions. [2021-02-19 19:31:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:31:35,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:35,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:35,247 INFO L225 Difference]: With dead ends: 17007 [2021-02-19 19:31:35,247 INFO L226 Difference]: Without dead ends: 17007 [2021-02-19 19:31:35,248 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:31:35,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17007 states. [2021-02-19 19:31:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17007 to 12161. [2021-02-19 19:31:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12161 states, 12160 states have (on average 3.8247532894736844) internal successors, (46509), 12160 states have internal predecessors, (46509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12161 states to 12161 states and 46509 transitions. [2021-02-19 19:31:35,532 INFO L78 Accepts]: Start accepts. Automaton has 12161 states and 46509 transitions. Word has length 28 [2021-02-19 19:31:35,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:35,532 INFO L480 AbstractCegarLoop]: Abstraction has 12161 states and 46509 transitions. [2021-02-19 19:31:35,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:35,532 INFO L276 IsEmpty]: Start isEmpty. Operand 12161 states and 46509 transitions. [2021-02-19 19:31:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:35,553 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:35,553 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:35,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:35,754 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:35,754 INFO L82 PathProgramCache]: Analyzing trace with hash -869150583, now seen corresponding path program 74 times [2021-02-19 19:31:35,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:35,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86269347] [2021-02-19 19:31:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:31:35,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86269347] [2021-02-19 19:31:35,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369698186] [2021-02-19 19:31:35,853 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 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 [2021-02-19 19:31:35,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:31:35,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:35,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:35,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:36,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:36,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 19:31:36,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011620868] [2021-02-19 19:31:36,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:31:36,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:36,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:31:36,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:31:36,338 INFO L87 Difference]: Start difference. First operand 12161 states and 46509 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:38,052 INFO L93 Difference]: Finished difference Result 15296 states and 56631 transitions. [2021-02-19 19:31:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:31:38,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:38,095 INFO L225 Difference]: With dead ends: 15296 [2021-02-19 19:31:38,095 INFO L226 Difference]: Without dead ends: 15245 [2021-02-19 19:31:38,096 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:31:38,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15245 states. [2021-02-19 19:31:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15245 to 11802. [2021-02-19 19:31:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11802 states, 11801 states have (on average 3.8163714939411912) internal successors, (45037), 11801 states have internal predecessors, (45037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:38,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11802 states to 11802 states and 45037 transitions. [2021-02-19 19:31:38,427 INFO L78 Accepts]: Start accepts. Automaton has 11802 states and 45037 transitions. Word has length 28 [2021-02-19 19:31:38,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:38,427 INFO L480 AbstractCegarLoop]: Abstraction has 11802 states and 45037 transitions. [2021-02-19 19:31:38,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:38,427 INFO L276 IsEmpty]: Start isEmpty. Operand 11802 states and 45037 transitions. [2021-02-19 19:31:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:38,445 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:38,445 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:38,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:38,646 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:38,646 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 75 times [2021-02-19 19:31:38,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:38,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047032362] [2021-02-19 19:31:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:38,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047032362] [2021-02-19 19:31:38,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221213795] [2021-02-19 19:31:38,802 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 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 [2021-02-19 19:31:38,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:31:38,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:38,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:38,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:39,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:39,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 19:31:39,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361170897] [2021-02-19 19:31:39,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:31:39,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:31:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:31:39,222 INFO L87 Difference]: Start difference. First operand 11802 states and 45037 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:41,104 INFO L93 Difference]: Finished difference Result 17674 states and 64680 transitions. [2021-02-19 19:31:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:31:41,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:41,153 INFO L225 Difference]: With dead ends: 17674 [2021-02-19 19:31:41,154 INFO L226 Difference]: Without dead ends: 17674 [2021-02-19 19:31:41,154 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:31:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17674 states. [2021-02-19 19:31:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17674 to 12136. [2021-02-19 19:31:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12136 states, 12135 states have (on average 3.7982694684796043) internal successors, (46092), 12135 states have internal predecessors, (46092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12136 states to 12136 states and 46092 transitions. [2021-02-19 19:31:41,469 INFO L78 Accepts]: Start accepts. Automaton has 12136 states and 46092 transitions. Word has length 28 [2021-02-19 19:31:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:41,469 INFO L480 AbstractCegarLoop]: Abstraction has 12136 states and 46092 transitions. [2021-02-19 19:31:41,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 12136 states and 46092 transitions. [2021-02-19 19:31:41,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:41,491 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:41,491 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:41,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-02-19 19:31:41,692 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:41,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:41,692 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 76 times [2021-02-19 19:31:41,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:41,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745887706] [2021-02-19 19:31:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:31:41,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745887706] [2021-02-19 19:31:41,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15415522] [2021-02-19 19:31:41,816 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 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 [2021-02-19 19:31:41,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:31:41,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:41,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:41,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:31:42,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:42,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 19:31:42,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784872251] [2021-02-19 19:31:42,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:31:42,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:42,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:31:42,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:31:42,170 INFO L87 Difference]: Start difference. First operand 12136 states and 46092 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:43,763 INFO L93 Difference]: Finished difference Result 17142 states and 63292 transitions. [2021-02-19 19:31:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 19:31:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:43,799 INFO L225 Difference]: With dead ends: 17142 [2021-02-19 19:31:43,800 INFO L226 Difference]: Without dead ends: 17134 [2021-02-19 19:31:43,800 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:31:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17134 states. [2021-02-19 19:31:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17134 to 12076. [2021-02-19 19:31:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12076 states, 12075 states have (on average 3.8004140786749483) internal successors, (45890), 12075 states have internal predecessors, (45890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12076 states to 12076 states and 45890 transitions. [2021-02-19 19:31:44,133 INFO L78 Accepts]: Start accepts. Automaton has 12076 states and 45890 transitions. Word has length 28 [2021-02-19 19:31:44,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:44,133 INFO L480 AbstractCegarLoop]: Abstraction has 12076 states and 45890 transitions. [2021-02-19 19:31:44,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:44,133 INFO L276 IsEmpty]: Start isEmpty. Operand 12076 states and 45890 transitions. [2021-02-19 19:31:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:44,152 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:44,152 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:44,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:44,352 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 77 times [2021-02-19 19:31:44,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:44,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822062945] [2021-02-19 19:31:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:44,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822062945] [2021-02-19 19:31:44,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322777633] [2021-02-19 19:31:44,530 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 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 [2021-02-19 19:31:44,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 19:31:44,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:44,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:44,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:44,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:44,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-02-19 19:31:44,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581436696] [2021-02-19 19:31:44,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:31:44,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:44,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:31:44,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:31:44,910 INFO L87 Difference]: Start difference. First operand 12076 states and 45890 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:46,571 INFO L93 Difference]: Finished difference Result 17042 states and 63006 transitions. [2021-02-19 19:31:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:31:46,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:46,618 INFO L225 Difference]: With dead ends: 17042 [2021-02-19 19:31:46,618 INFO L226 Difference]: Without dead ends: 17030 [2021-02-19 19:31:46,619 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:31:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17030 states. [2021-02-19 19:31:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17030 to 12042. [2021-02-19 19:31:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12042 states, 12041 states have (on average 3.802591146914708) internal successors, (45787), 12041 states have internal predecessors, (45787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12042 states to 12042 states and 45787 transitions. [2021-02-19 19:31:46,973 INFO L78 Accepts]: Start accepts. Automaton has 12042 states and 45787 transitions. Word has length 28 [2021-02-19 19:31:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:46,973 INFO L480 AbstractCegarLoop]: Abstraction has 12042 states and 45787 transitions. [2021-02-19 19:31:46,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:46,974 INFO L276 IsEmpty]: Start isEmpty. Operand 12042 states and 45787 transitions. [2021-02-19 19:31:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:46,995 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:46,995 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:47,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-02-19 19:31:47,195 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:47,196 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 78 times [2021-02-19 19:31:47,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:47,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317610715] [2021-02-19 19:31:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:31:47,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317610715] [2021-02-19 19:31:47,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488511508] [2021-02-19 19:31:47,344 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 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 [2021-02-19 19:31:47,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:31:47,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:47,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:31:47,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:47,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:47,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-02-19 19:31:47,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405316602] [2021-02-19 19:31:47,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:31:47,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:47,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:31:47,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:31:47,743 INFO L87 Difference]: Start difference. First operand 12042 states and 45787 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:51,477 INFO L93 Difference]: Finished difference Result 23223 states and 83033 transitions. [2021-02-19 19:31:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:31:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:51,540 INFO L225 Difference]: With dead ends: 23223 [2021-02-19 19:31:51,540 INFO L226 Difference]: Without dead ends: 23223 [2021-02-19 19:31:51,540 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:31:51,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23223 states. [2021-02-19 19:31:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23223 to 12022. [2021-02-19 19:31:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12022 states, 12021 states have (on average 3.80126445387239) internal successors, (45695), 12021 states have internal predecessors, (45695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12022 states to 12022 states and 45695 transitions. [2021-02-19 19:31:51,923 INFO L78 Accepts]: Start accepts. Automaton has 12022 states and 45695 transitions. Word has length 28 [2021-02-19 19:31:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:51,923 INFO L480 AbstractCegarLoop]: Abstraction has 12022 states and 45695 transitions. [2021-02-19 19:31:51,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 12022 states and 45695 transitions. [2021-02-19 19:31:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:51,940 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:51,940 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:52,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:52,141 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:52,141 INFO L82 PathProgramCache]: Analyzing trace with hash 368022285, now seen corresponding path program 106 times [2021-02-19 19:31:52,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:52,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596935818] [2021-02-19 19:31:52,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:31:52,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596935818] [2021-02-19 19:31:52,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503490203] [2021-02-19 19:31:52,251 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 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 [2021-02-19 19:31:52,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:31:52,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:52,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:31:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:52,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:52,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 19:31:52,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063573921] [2021-02-19 19:31:52,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:31:52,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:52,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:31:52,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:31:52,725 INFO L87 Difference]: Start difference. First operand 12022 states and 45695 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:55,298 INFO L93 Difference]: Finished difference Result 19082 states and 69275 transitions. [2021-02-19 19:31:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:31:55,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:55,345 INFO L225 Difference]: With dead ends: 19082 [2021-02-19 19:31:55,345 INFO L226 Difference]: Without dead ends: 19069 [2021-02-19 19:31:55,345 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:31:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19069 states. [2021-02-19 19:31:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19069 to 13536. [2021-02-19 19:31:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13536 states, 13535 states have (on average 3.87247875877355) internal successors, (52414), 13535 states have internal predecessors, (52414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13536 states to 13536 states and 52414 transitions. [2021-02-19 19:31:55,699 INFO L78 Accepts]: Start accepts. Automaton has 13536 states and 52414 transitions. Word has length 28 [2021-02-19 19:31:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:55,699 INFO L480 AbstractCegarLoop]: Abstraction has 13536 states and 52414 transitions. [2021-02-19 19:31:55,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 13536 states and 52414 transitions. [2021-02-19 19:31:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:55,723 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:55,723 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:55,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-02-19 19:31:55,924 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:55,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435067, now seen corresponding path program 107 times [2021-02-19 19:31:55,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:55,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656183791] [2021-02-19 19:31:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:31:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656183791] [2021-02-19 19:31:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904619012] [2021-02-19 19:31:56,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:31:56,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:31:56,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:56,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:31:56,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:56,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:56,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-02-19 19:31:56,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157004965] [2021-02-19 19:31:56,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:31:56,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:56,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:31:56,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:31:56,456 INFO L87 Difference]: Start difference. First operand 13536 states and 52414 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:58,980 INFO L93 Difference]: Finished difference Result 19234 states and 69698 transitions. [2021-02-19 19:31:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:31:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:31:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:59,025 INFO L225 Difference]: With dead ends: 19234 [2021-02-19 19:31:59,025 INFO L226 Difference]: Without dead ends: 19219 [2021-02-19 19:31:59,026 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:31:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19219 states. [2021-02-19 19:31:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19219 to 13503. [2021-02-19 19:31:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13503 states, 13502 states have (on average 3.8712042660346615) internal successors, (52269), 13502 states have internal predecessors, (52269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13503 states to 13503 states and 52269 transitions. [2021-02-19 19:31:59,365 INFO L78 Accepts]: Start accepts. Automaton has 13503 states and 52269 transitions. Word has length 28 [2021-02-19 19:31:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:59,366 INFO L480 AbstractCegarLoop]: Abstraction has 13503 states and 52269 transitions. [2021-02-19 19:31:59,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 13503 states and 52269 transitions. [2021-02-19 19:31:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:31:59,389 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:59,389 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:59,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-02-19 19:31:59,589 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:59,589 INFO L82 PathProgramCache]: Analyzing trace with hash -774903755, now seen corresponding path program 108 times [2021-02-19 19:31:59,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:59,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224075185] [2021-02-19 19:31:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:59,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224075185] [2021-02-19 19:31:59,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939672537] [2021-02-19 19:31:59,718 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 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 [2021-02-19 19:31:59,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:31:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:59,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:31:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:00,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:00,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-02-19 19:32:00,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193387960] [2021-02-19 19:32:00,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:32:00,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:32:00,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:32:00,158 INFO L87 Difference]: Start difference. First operand 13503 states and 52269 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-02-19 19:32:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:02,286 INFO L93 Difference]: Finished difference Result 21561 states and 78244 transitions. [2021-02-19 19:32:02,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:32:02,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:02,345 INFO L225 Difference]: With dead ends: 21561 [2021-02-19 19:32:02,345 INFO L226 Difference]: Without dead ends: 21548 [2021-02-19 19:32:02,345 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:32:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21548 states. [2021-02-19 19:32:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21548 to 13585. [2021-02-19 19:32:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13585 states, 13584 states have (on average 3.8769140164899882) internal successors, (52664), 13584 states have internal predecessors, (52664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13585 states to 13585 states and 52664 transitions. [2021-02-19 19:32:02,684 INFO L78 Accepts]: Start accepts. Automaton has 13585 states and 52664 transitions. Word has length 28 [2021-02-19 19:32:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:02,684 INFO L480 AbstractCegarLoop]: Abstraction has 13585 states and 52664 transitions. [2021-02-19 19:32:02,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-02-19 19:32:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 13585 states and 52664 transitions. [2021-02-19 19:32:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:02,708 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:02,708 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:02,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-02-19 19:32:02,908 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 109 times [2021-02-19 19:32:02,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:02,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179876686] [2021-02-19 19:32:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:03,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179876686] [2021-02-19 19:32:03,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185472782] [2021-02-19 19:32:03,015 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:32:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:03,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:32:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:03,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:03,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-02-19 19:32:03,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273441766] [2021-02-19 19:32:03,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:32:03,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:03,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:32:03,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:32:03,460 INFO L87 Difference]: Start difference. First operand 13585 states and 52664 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-02-19 19:32:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:06,111 INFO L93 Difference]: Finished difference Result 22860 states and 82295 transitions. [2021-02-19 19:32:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:32:06,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:06,234 INFO L225 Difference]: With dead ends: 22860 [2021-02-19 19:32:06,234 INFO L226 Difference]: Without dead ends: 22860 [2021-02-19 19:32:06,235 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:32:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22860 states. [2021-02-19 19:32:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22860 to 13609. [2021-02-19 19:32:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13609 states, 13608 states have (on average 3.873456790123457) internal successors, (52710), 13608 states have internal predecessors, (52710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13609 states to 13609 states and 52710 transitions. [2021-02-19 19:32:06,586 INFO L78 Accepts]: Start accepts. Automaton has 13609 states and 52710 transitions. Word has length 28 [2021-02-19 19:32:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:06,586 INFO L480 AbstractCegarLoop]: Abstraction has 13609 states and 52710 transitions. [2021-02-19 19:32:06,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-02-19 19:32:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 13609 states and 52710 transitions. [2021-02-19 19:32:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:06,611 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:06,612 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:06,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-02-19 19:32:06,812 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:06,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 79 times [2021-02-19 19:32:06,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:06,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388181144] [2021-02-19 19:32:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:06,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388181144] [2021-02-19 19:32:06,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002719110] [2021-02-19 19:32:06,899 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 [2021-02-19 19:32:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:06,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:32:06,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:07,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:07,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-02-19 19:32:07,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503881698] [2021-02-19 19:32:07,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:32:07,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:07,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:32:07,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:32:07,289 INFO L87 Difference]: Start difference. First operand 13609 states and 52710 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:10,750 INFO L93 Difference]: Finished difference Result 23663 states and 87292 transitions. [2021-02-19 19:32:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 19:32:10,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:10,892 INFO L225 Difference]: With dead ends: 23663 [2021-02-19 19:32:10,892 INFO L226 Difference]: Without dead ends: 23659 [2021-02-19 19:32:10,892 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:32:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23659 states. [2021-02-19 19:32:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23659 to 13905. [2021-02-19 19:32:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13905 states, 13904 states have (on average 3.861910241657077) internal successors, (53696), 13904 states have internal predecessors, (53696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13905 states to 13905 states and 53696 transitions. [2021-02-19 19:32:11,292 INFO L78 Accepts]: Start accepts. Automaton has 13905 states and 53696 transitions. Word has length 28 [2021-02-19 19:32:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:11,292 INFO L480 AbstractCegarLoop]: Abstraction has 13905 states and 53696 transitions. [2021-02-19 19:32:11,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 13905 states and 53696 transitions. [2021-02-19 19:32:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:11,318 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:11,318 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:11,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:32:11,518 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:11,519 INFO L82 PathProgramCache]: Analyzing trace with hash -516108431, now seen corresponding path program 110 times [2021-02-19 19:32:11,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:11,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005830816] [2021-02-19 19:32:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:11,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005830816] [2021-02-19 19:32:11,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346764316] [2021-02-19 19:32:11,601 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 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 [2021-02-19 19:32:11,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:32:11,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:32:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:32:11,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:11,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:11,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 19:32:11,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478216545] [2021-02-19 19:32:11,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:32:11,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:11,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:32:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:32:11,915 INFO L87 Difference]: Start difference. First operand 13905 states and 53696 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:14,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:14,378 INFO L93 Difference]: Finished difference Result 20131 states and 74104 transitions. [2021-02-19 19:32:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:32:14,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:14,430 INFO L225 Difference]: With dead ends: 20131 [2021-02-19 19:32:14,430 INFO L226 Difference]: Without dead ends: 20108 [2021-02-19 19:32:14,430 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:32:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20108 states. [2021-02-19 19:32:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20108 to 13931. [2021-02-19 19:32:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13931 states, 13930 states have (on average 3.868844221105528) internal successors, (53893), 13930 states have internal predecessors, (53893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13931 states to 13931 states and 53893 transitions. [2021-02-19 19:32:14,805 INFO L78 Accepts]: Start accepts. Automaton has 13931 states and 53893 transitions. Word has length 28 [2021-02-19 19:32:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:14,805 INFO L480 AbstractCegarLoop]: Abstraction has 13931 states and 53893 transitions. [2021-02-19 19:32:14,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:14,805 INFO L276 IsEmpty]: Start isEmpty. Operand 13931 states and 53893 transitions. [2021-02-19 19:32:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:14,824 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:14,824 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:15,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-02-19 19:32:15,026 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:15,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 111 times [2021-02-19 19:32:15,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:15,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602221290] [2021-02-19 19:32:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:15,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602221290] [2021-02-19 19:32:15,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838347722] [2021-02-19 19:32:15,158 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 [2021-02-19 19:32:15,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:32:15,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:32:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:32:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:15,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:15,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 19:32:15,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863277851] [2021-02-19 19:32:15,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:32:15,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:15,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:32:15,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:32:15,568 INFO L87 Difference]: Start difference. First operand 13931 states and 53893 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:18,480 INFO L93 Difference]: Finished difference Result 19586 states and 71135 transitions. [2021-02-19 19:32:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:32:18,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:18,531 INFO L225 Difference]: With dead ends: 19586 [2021-02-19 19:32:18,531 INFO L226 Difference]: Without dead ends: 19586 [2021-02-19 19:32:18,531 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:32:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19586 states. [2021-02-19 19:32:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19586 to 13884. [2021-02-19 19:32:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13884 states, 13883 states have (on average 3.861197147590578) internal successors, (53605), 13883 states have internal predecessors, (53605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13884 states to 13884 states and 53605 transitions. [2021-02-19 19:32:18,924 INFO L78 Accepts]: Start accepts. Automaton has 13884 states and 53605 transitions. Word has length 28 [2021-02-19 19:32:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:18,924 INFO L480 AbstractCegarLoop]: Abstraction has 13884 states and 53605 transitions. [2021-02-19 19:32:18,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:18,924 INFO L276 IsEmpty]: Start isEmpty. Operand 13884 states and 53605 transitions. [2021-02-19 19:32:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:18,949 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:18,949 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:19,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-02-19 19:32:19,149 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:19,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:19,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1518971225, now seen corresponding path program 112 times [2021-02-19 19:32:19,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:19,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138302821] [2021-02-19 19:32:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:19,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138302821] [2021-02-19 19:32:19,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674039929] [2021-02-19 19:32:19,279 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 [2021-02-19 19:32:19,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:32:19,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:32:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:32:19,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:19,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:19,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 19:32:19,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730909588] [2021-02-19 19:32:19,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:32:19,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:19,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:32:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:32:19,691 INFO L87 Difference]: Start difference. First operand 13884 states and 53605 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:22,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:22,389 INFO L93 Difference]: Finished difference Result 20889 states and 76304 transitions. [2021-02-19 19:32:22,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:32:22,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:22,434 INFO L225 Difference]: With dead ends: 20889 [2021-02-19 19:32:22,434 INFO L226 Difference]: Without dead ends: 20889 [2021-02-19 19:32:22,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:32:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20889 states. [2021-02-19 19:32:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20889 to 14597. [2021-02-19 19:32:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14597 states, 14596 states have (on average 3.8473554398465333) internal successors, (56156), 14596 states have internal predecessors, (56156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14597 states to 14597 states and 56156 transitions. [2021-02-19 19:32:22,858 INFO L78 Accepts]: Start accepts. Automaton has 14597 states and 56156 transitions. Word has length 28 [2021-02-19 19:32:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:22,858 INFO L480 AbstractCegarLoop]: Abstraction has 14597 states and 56156 transitions. [2021-02-19 19:32:22,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 14597 states and 56156 transitions. [2021-02-19 19:32:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:22,884 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:22,884 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:23,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:32:23,084 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash -629568261, now seen corresponding path program 113 times [2021-02-19 19:32:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:23,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175160340] [2021-02-19 19:32:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:23,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175160340] [2021-02-19 19:32:23,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206430421] [2021-02-19 19:32:23,216 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 [2021-02-19 19:32:23,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:32:23,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:32:23,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:32:23,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:23,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:23,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 19:32:23,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913896921] [2021-02-19 19:32:23,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:32:23,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:23,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:32:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:32:23,648 INFO L87 Difference]: Start difference. First operand 14597 states and 56156 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:27,229 INFO L93 Difference]: Finished difference Result 23424 states and 84291 transitions. [2021-02-19 19:32:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:32:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:27,290 INFO L225 Difference]: With dead ends: 23424 [2021-02-19 19:32:27,290 INFO L226 Difference]: Without dead ends: 23424 [2021-02-19 19:32:27,290 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:32:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23424 states. [2021-02-19 19:32:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23424 to 14827. [2021-02-19 19:32:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14827 states, 14826 states have (on average 3.8584243895858625) internal successors, (57205), 14826 states have internal predecessors, (57205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14827 states to 14827 states and 57205 transitions. [2021-02-19 19:32:27,822 INFO L78 Accepts]: Start accepts. Automaton has 14827 states and 57205 transitions. Word has length 28 [2021-02-19 19:32:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:27,822 INFO L480 AbstractCegarLoop]: Abstraction has 14827 states and 57205 transitions. [2021-02-19 19:32:27,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 14827 states and 57205 transitions. [2021-02-19 19:32:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:27,853 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:27,853 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:28,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:32:28,053 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 80 times [2021-02-19 19:32:28,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:28,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787090442] [2021-02-19 19:32:28,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:28,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787090442] [2021-02-19 19:32:28,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560221754] [2021-02-19 19:32:28,208 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 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 [2021-02-19 19:32:28,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:32:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:32:28,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:32:28,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:28,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:28,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 19:32:28,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206638421] [2021-02-19 19:32:28,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:32:28,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:32:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:32:28,794 INFO L87 Difference]: Start difference. First operand 14827 states and 57205 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:34,859 INFO L93 Difference]: Finished difference Result 41579 states and 149442 transitions. [2021-02-19 19:32:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 19:32:34,859 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:34,975 INFO L225 Difference]: With dead ends: 41579 [2021-02-19 19:32:34,975 INFO L226 Difference]: Without dead ends: 41579 [2021-02-19 19:32:34,976 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 19:32:35,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41579 states. [2021-02-19 19:32:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41579 to 16183. [2021-02-19 19:32:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16183 states, 16182 states have (on average 3.9048943270300334) internal successors, (63189), 16182 states have internal predecessors, (63189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16183 states to 16183 states and 63189 transitions. [2021-02-19 19:32:35,744 INFO L78 Accepts]: Start accepts. Automaton has 16183 states and 63189 transitions. Word has length 28 [2021-02-19 19:32:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:35,744 INFO L480 AbstractCegarLoop]: Abstraction has 16183 states and 63189 transitions. [2021-02-19 19:32:35,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:35,744 INFO L276 IsEmpty]: Start isEmpty. Operand 16183 states and 63189 transitions. [2021-02-19 19:32:35,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:35,773 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:35,773 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:35,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:32:35,974 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 81 times [2021-02-19 19:32:35,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:35,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135103445] [2021-02-19 19:32:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:36,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135103445] [2021-02-19 19:32:36,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424431177] [2021-02-19 19:32:36,143 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 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 [2021-02-19 19:32:36,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:32:36,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:32:36,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:32:36,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:36,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:36,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 19:32:36,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369274716] [2021-02-19 19:32:36,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:32:36,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:36,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:32:36,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:32:36,722 INFO L87 Difference]: Start difference. First operand 16183 states and 63189 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:39,715 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-02-19 19:32:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:42,267 INFO L93 Difference]: Finished difference Result 40525 states and 146701 transitions. [2021-02-19 19:32:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 19:32:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:42,382 INFO L225 Difference]: With dead ends: 40525 [2021-02-19 19:32:42,382 INFO L226 Difference]: Without dead ends: 40525 [2021-02-19 19:32:42,383 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 19:32:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40525 states. [2021-02-19 19:32:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40525 to 16151. [2021-02-19 19:32:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16151 states, 16150 states have (on average 3.901238390092879) internal successors, (63005), 16150 states have internal predecessors, (63005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 63005 transitions. [2021-02-19 19:32:43,051 INFO L78 Accepts]: Start accepts. Automaton has 16151 states and 63005 transitions. Word has length 28 [2021-02-19 19:32:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:43,051 INFO L480 AbstractCegarLoop]: Abstraction has 16151 states and 63005 transitions. [2021-02-19 19:32:43,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 16151 states and 63005 transitions. [2021-02-19 19:32:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:43,170 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:43,170 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:43,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2021-02-19 19:32:43,371 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:43,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:43,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 114 times [2021-02-19 19:32:43,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:43,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024121780] [2021-02-19 19:32:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:43,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024121780] [2021-02-19 19:32:43,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204349750] [2021-02-19 19:32:43,522 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 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 [2021-02-19 19:32:43,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:32:43,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:32:43,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:32:43,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:43,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:43,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 19:32:43,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744180305] [2021-02-19 19:32:43,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:32:43,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:43,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:32:43,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:32:43,886 INFO L87 Difference]: Start difference. First operand 16151 states and 63005 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:44,663 INFO L93 Difference]: Finished difference Result 25101 states and 96472 transitions. [2021-02-19 19:32:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:32:44,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:44,740 INFO L225 Difference]: With dead ends: 25101 [2021-02-19 19:32:44,740 INFO L226 Difference]: Without dead ends: 25054 [2021-02-19 19:32:44,740 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:32:44,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25054 states. [2021-02-19 19:32:45,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25054 to 20834. [2021-02-19 19:32:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20834 states, 20833 states have (on average 3.9086065377046033) internal successors, (81428), 20833 states have internal predecessors, (81428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20834 states to 20834 states and 81428 transitions. [2021-02-19 19:32:45,234 INFO L78 Accepts]: Start accepts. Automaton has 20834 states and 81428 transitions. Word has length 28 [2021-02-19 19:32:45,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:45,234 INFO L480 AbstractCegarLoop]: Abstraction has 20834 states and 81428 transitions. [2021-02-19 19:32:45,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:45,234 INFO L276 IsEmpty]: Start isEmpty. Operand 20834 states and 81428 transitions. [2021-02-19 19:32:45,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:45,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:45,273 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:45,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-02-19 19:32:45,473 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:45,474 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 115 times [2021-02-19 19:32:45,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:45,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570410536] [2021-02-19 19:32:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:45,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570410536] [2021-02-19 19:32:45,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038643611] [2021-02-19 19:32:45,605 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 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 [2021-02-19 19:32:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:32:45,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:45,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:45,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:32:45,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035107484] [2021-02-19 19:32:45,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:32:45,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:32:45,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:32:45,975 INFO L87 Difference]: Start difference. First operand 20834 states and 81428 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:46,806 INFO L93 Difference]: Finished difference Result 23589 states and 89800 transitions. [2021-02-19 19:32:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:32:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:46,977 INFO L225 Difference]: With dead ends: 23589 [2021-02-19 19:32:46,977 INFO L226 Difference]: Without dead ends: 23589 [2021-02-19 19:32:46,977 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:32:46,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23589 states. [2021-02-19 19:32:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23589 to 20337. [2021-02-19 19:32:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20337 states, 20336 states have (on average 3.8973249409913455) internal successors, (79256), 20336 states have internal predecessors, (79256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20337 states to 20337 states and 79256 transitions. [2021-02-19 19:32:47,392 INFO L78 Accepts]: Start accepts. Automaton has 20337 states and 79256 transitions. Word has length 28 [2021-02-19 19:32:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:47,392 INFO L480 AbstractCegarLoop]: Abstraction has 20337 states and 79256 transitions. [2021-02-19 19:32:47,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:47,392 INFO L276 IsEmpty]: Start isEmpty. Operand 20337 states and 79256 transitions. [2021-02-19 19:32:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:47,429 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:47,429 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:47,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-02-19 19:32:47,630 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 116 times [2021-02-19 19:32:47,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:47,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423705495] [2021-02-19 19:32:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:47,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423705495] [2021-02-19 19:32:47,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622329274] [2021-02-19 19:32:47,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:32:47,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:32:47,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:32:47,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:32:47,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:32:48,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:48,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 19:32:48,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031751460] [2021-02-19 19:32:48,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:32:48,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:48,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:32:48,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:32:48,210 INFO L87 Difference]: Start difference. First operand 20337 states and 79256 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:51,749 INFO L93 Difference]: Finished difference Result 32287 states and 119734 transitions. [2021-02-19 19:32:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:32:51,752 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:51,849 INFO L225 Difference]: With dead ends: 32287 [2021-02-19 19:32:51,850 INFO L226 Difference]: Without dead ends: 32287 [2021-02-19 19:32:51,850 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:32:51,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32287 states. [2021-02-19 19:32:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32287 to 20403. [2021-02-19 19:32:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20403 states, 20402 states have (on average 3.8954024115282815) internal successors, (79474), 20402 states have internal predecessors, (79474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20403 states to 20403 states and 79474 transitions. [2021-02-19 19:32:52,444 INFO L78 Accepts]: Start accepts. Automaton has 20403 states and 79474 transitions. Word has length 28 [2021-02-19 19:32:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:52,444 INFO L480 AbstractCegarLoop]: Abstraction has 20403 states and 79474 transitions. [2021-02-19 19:32:52,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 20403 states and 79474 transitions. [2021-02-19 19:32:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:32:52,483 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:52,483 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:52,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-02-19 19:32:52,684 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:52,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 117 times [2021-02-19 19:32:52,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:52,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217024107] [2021-02-19 19:32:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:52,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217024107] [2021-02-19 19:32:52,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106056899] [2021-02-19 19:32:52,790 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 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 [2021-02-19 19:32:52,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:32:52,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:32:52,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:32:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:32:53,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:53,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 19:32:53,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948839018] [2021-02-19 19:32:53,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:32:53,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:32:53,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:32:53,303 INFO L87 Difference]: Start difference. First operand 20403 states and 79474 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-02-19 19:32:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:59,112 INFO L93 Difference]: Finished difference Result 41433 states and 151902 transitions. [2021-02-19 19:32:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-02-19 19:32:59,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:32:59,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:59,229 INFO L225 Difference]: With dead ends: 41433 [2021-02-19 19:32:59,229 INFO L226 Difference]: Without dead ends: 41433 [2021-02-19 19:32:59,230 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-02-19 19:32:59,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41433 states. [2021-02-19 19:32:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41433 to 20408. [2021-02-19 19:32:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20408 states, 20407 states have (on average 3.8974371539177732) internal successors, (79535), 20407 states have internal predecessors, (79535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20408 states to 20408 states and 79535 transitions. [2021-02-19 19:33:00,016 INFO L78 Accepts]: Start accepts. Automaton has 20408 states and 79535 transitions. Word has length 28 [2021-02-19 19:33:00,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:33:00,017 INFO L480 AbstractCegarLoop]: Abstraction has 20408 states and 79535 transitions. [2021-02-19 19:33:00,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-02-19 19:33:00,017 INFO L276 IsEmpty]: Start isEmpty. Operand 20408 states and 79535 transitions. [2021-02-19 19:33:00,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:33:00,055 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:33:00,055 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:33:00,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable444,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:33:00,255 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:33:00,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:33:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 118 times [2021-02-19 19:33:00,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:33:00,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229316140] [2021-02-19 19:33:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:33:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:33:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:33:00,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229316140] [2021-02-19 19:33:00,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781896431] [2021-02-19 19:33:00,418 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 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 [2021-02-19 19:33:00,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:33:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:33:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:33:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:33:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:33:00,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:33:00,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 19:33:00,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843029365] [2021-02-19 19:33:00,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:33:00,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:33:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:33:00,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:33:00,960 INFO L87 Difference]: Start difference. First operand 20408 states and 79535 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-02-19 19:33:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:33:06,590 INFO L93 Difference]: Finished difference Result 41109 states and 151387 transitions. [2021-02-19 19:33:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 19:33:06,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:33:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:33:06,896 INFO L225 Difference]: With dead ends: 41109 [2021-02-19 19:33:06,896 INFO L226 Difference]: Without dead ends: 41109 [2021-02-19 19:33:06,896 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 19:33:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41109 states. [2021-02-19 19:33:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41109 to 20196. [2021-02-19 19:33:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20196 states, 20195 states have (on average 3.889774696707106) internal successors, (78554), 20195 states have internal predecessors, (78554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20196 states to 20196 states and 78554 transitions. [2021-02-19 19:33:07,675 INFO L78 Accepts]: Start accepts. Automaton has 20196 states and 78554 transitions. Word has length 28 [2021-02-19 19:33:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:33:07,675 INFO L480 AbstractCegarLoop]: Abstraction has 20196 states and 78554 transitions. [2021-02-19 19:33:07,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-02-19 19:33:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20196 states and 78554 transitions. [2021-02-19 19:33:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:33:07,785 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:33:07,785 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:33:07,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-02-19 19:33:07,994 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:33:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:33:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 119 times [2021-02-19 19:33:07,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:33:07,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2664195] [2021-02-19 19:33:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:33:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:33:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:33:08,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2664195] [2021-02-19 19:33:08,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973230616] [2021-02-19 19:33:08,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:33:08,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:33:08,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:33:08,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:33:08,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:33:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:33:08,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:33:08,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 19:33:08,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39329897] [2021-02-19 19:33:08,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:33:08,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:33:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:33:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:33:08,524 INFO L87 Difference]: Start difference. First operand 20196 states and 78554 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:33:09,364 INFO L93 Difference]: Finished difference Result 29701 states and 111053 transitions. [2021-02-19 19:33:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:33:09,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:33:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:33:09,450 INFO L225 Difference]: With dead ends: 29701 [2021-02-19 19:33:09,450 INFO L226 Difference]: Without dead ends: 29684 [2021-02-19 19:33:09,450 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:33:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29684 states. [2021-02-19 19:33:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29684 to 20467. [2021-02-19 19:33:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20467 states, 20466 states have (on average 3.89524088732532) internal successors, (79720), 20466 states have internal predecessors, (79720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20467 states to 20467 states and 79720 transitions. [2021-02-19 19:33:10,079 INFO L78 Accepts]: Start accepts. Automaton has 20467 states and 79720 transitions. Word has length 28 [2021-02-19 19:33:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:33:10,079 INFO L480 AbstractCegarLoop]: Abstraction has 20467 states and 79720 transitions. [2021-02-19 19:33:10,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 20467 states and 79720 transitions. [2021-02-19 19:33:10,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:33:10,115 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:33:10,115 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:33:10,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:33:10,316 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:33:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:33:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 120 times [2021-02-19 19:33:10,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:33:10,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910703551] [2021-02-19 19:33:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:33:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:33:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:33:10,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910703551] [2021-02-19 19:33:10,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909049034] [2021-02-19 19:33:10,431 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 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 [2021-02-19 19:33:10,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:33:10,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:33:10,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:33:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:33:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:33:10,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:33:10,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 19:33:10,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941259581] [2021-02-19 19:33:10,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:33:10,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:33:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:33:10,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:33:10,649 INFO L87 Difference]: Start difference. First operand 20467 states and 79720 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:33:11,485 INFO L93 Difference]: Finished difference Result 31486 states and 116618 transitions. [2021-02-19 19:33:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:33:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:33:11,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:33:11,579 INFO L225 Difference]: With dead ends: 31486 [2021-02-19 19:33:11,579 INFO L226 Difference]: Without dead ends: 31486 [2021-02-19 19:33:11,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:33:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31486 states. [2021-02-19 19:33:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31486 to 20136. [2021-02-19 19:33:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20136 states, 20135 states have (on average 3.880506580581078) internal successors, (78134), 20135 states have internal predecessors, (78134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20136 states to 20136 states and 78134 transitions. [2021-02-19 19:33:12,216 INFO L78 Accepts]: Start accepts. Automaton has 20136 states and 78134 transitions. Word has length 28 [2021-02-19 19:33:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:33:12,216 INFO L480 AbstractCegarLoop]: Abstraction has 20136 states and 78134 transitions. [2021-02-19 19:33:12,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 20136 states and 78134 transitions. [2021-02-19 19:33:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:33:12,377 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:33:12,377 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:33:12,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-02-19 19:33:12,582 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:33:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:33:12,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 121 times [2021-02-19 19:33:12,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:33:12,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935671424] [2021-02-19 19:33:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:33:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:33:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:33:12,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935671424] [2021-02-19 19:33:12,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468894101] [2021-02-19 19:33:12,743 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 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 [2021-02-19 19:33:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:33:12,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:33:12,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:33:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:33:13,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:33:13,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-02-19 19:33:13,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099490230] [2021-02-19 19:33:13,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:33:13,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:33:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:33:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:33:13,153 INFO L87 Difference]: Start difference. First operand 20136 states and 78134 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:15,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:33:15,930 INFO L93 Difference]: Finished difference Result 29808 states and 110860 transitions. [2021-02-19 19:33:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 19:33:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:33:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:33:16,017 INFO L225 Difference]: With dead ends: 29808 [2021-02-19 19:33:16,017 INFO L226 Difference]: Without dead ends: 29808 [2021-02-19 19:33:16,018 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:33:16,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29808 states. [2021-02-19 19:33:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29808 to 20182. [2021-02-19 19:33:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20182 states, 20181 states have (on average 3.878945542837322) internal successors, (78281), 20181 states have internal predecessors, (78281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20182 states to 20182 states and 78281 transitions. [2021-02-19 19:33:16,687 INFO L78 Accepts]: Start accepts. Automaton has 20182 states and 78281 transitions. Word has length 28 [2021-02-19 19:33:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:33:16,687 INFO L480 AbstractCegarLoop]: Abstraction has 20182 states and 78281 transitions. [2021-02-19 19:33:16,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 20182 states and 78281 transitions. [2021-02-19 19:33:16,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:33:16,726 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:33:16,726 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:33:16,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:33:16,926 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:33:16,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:33:16,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 122 times [2021-02-19 19:33:16,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:33:16,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381688032] [2021-02-19 19:33:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:33:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:33:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:33:17,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381688032] [2021-02-19 19:33:17,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479850410] [2021-02-19 19:33:17,042 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 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 [2021-02-19 19:33:17,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:33:17,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:33:17,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:33:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:33:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:33:17,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:33:17,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-02-19 19:33:17,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324829144] [2021-02-19 19:33:17,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:33:17,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:33:17,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:33:17,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:33:17,502 INFO L87 Difference]: Start difference. First operand 20182 states and 78281 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:21,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:33:21,352 INFO L93 Difference]: Finished difference Result 31468 states and 115659 transitions. [2021-02-19 19:33:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 19:33:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:33:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:33:21,416 INFO L225 Difference]: With dead ends: 31468 [2021-02-19 19:33:21,417 INFO L226 Difference]: Without dead ends: 31468 [2021-02-19 19:33:21,417 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 19:33:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31468 states. [2021-02-19 19:33:21,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31468 to 20716. [2021-02-19 19:33:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20716 states, 20715 states have (on average 3.8580738595220856) internal successors, (79920), 20715 states have internal predecessors, (79920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20716 states to 20716 states and 79920 transitions. [2021-02-19 19:33:22,055 INFO L78 Accepts]: Start accepts. Automaton has 20716 states and 79920 transitions. Word has length 28 [2021-02-19 19:33:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:33:22,056 INFO L480 AbstractCegarLoop]: Abstraction has 20716 states and 79920 transitions. [2021-02-19 19:33:22,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:33:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 20716 states and 79920 transitions. [2021-02-19 19:33:22,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:33:22,092 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:33:22,092 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:33:22,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:33:22,293 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:33:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:33:22,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 123 times [2021-02-19 19:33:22,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:33:22,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311535511] [2021-02-19 19:33:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:33:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:33:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:33:22,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311535511] [2021-02-19 19:33:22,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634648722] [2021-02-19 19:33:22,472 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 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 [2021-02-19 19:33:22,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:33:22,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:33:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:33:22,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:33:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:33:22,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:33:22,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-02-19 19:33:22,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459093970] [2021-02-19 19:33:22,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:33:22,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:33:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:33:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:33:22,938 INFO L87 Difference]: Start difference. First operand 20716 states and 79920 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-02-19 19:33:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:33:24,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:33:24,400 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 19:33:24,404 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 19:33:24,404 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:33:24 BasicIcfg [2021-02-19 19:33:24,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:33:24,404 INFO L168 Benchmark]: Toolchain (without parser) took 558667.77 ms. Allocated memory was 255.9 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 236.5 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-02-19 19:33:24,404 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:33:24,404 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.35 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:33:24,404 INFO L168 Benchmark]: Boogie Preprocessor took 15.64 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.6 MB in the end (delta: 954.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:33:24,404 INFO L168 Benchmark]: RCFGBuilder took 191.05 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 237.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-02-19 19:33:24,404 INFO L168 Benchmark]: TraceAbstraction took 558431.28 ms. Allocated memory was 255.9 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 237.0 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-02-19 19:33:24,405 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.35 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.64 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.6 MB in the end (delta: 954.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 191.05 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 237.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 558431.28 ms. Allocated memory was 255.9 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 237.0 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.1 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 constructing difference of abstraction (20716states) and FLOYD_HOARE automaton (currently 27 states, 14 states before enhancement),while ReachableStatesComputation was computing reachable states (1362 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 558.3s, OverallIterations: 206, TraceHistogramMax: 3, AutomataDifference: 388.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9368 SDtfs, 51373 SDslu, 68955 SDs, 0 SdLazy, 116536 SolverSat, 8929 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 74.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12728 GetRequests, 4243 SyntacticMatches, 250 SemanticMatches, 8235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130334 ImplicationChecksByTransitivity, 276.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20834occurred in iteration=197, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 25.2s AutomataMinimizationTime, 205 MinimizatonAttempts, 648567 StatesRemovedByMinimization, 204 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 95.3s InterpolantComputationTime, 10810 NumberOfCodeBlocks, 10810 NumberOfCodeBlocksAsserted, 704 NumberOfCheckSat, 10400 ConstructedInterpolants, 93 QuantifiedInterpolants, 2882166 SizeOfPredicates, 961 NumberOfNonLiveVariables, 14077 ConjunctsInSsa, 3299 ConjunctsInUnsatCore, 410 InterpolantComputations, 2 PerfectInterpolantSequences, 653/3243 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