java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:15:22,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:15:22,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:15:22,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:15:22,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:15:22,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:15:22,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:15:22,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:15:22,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:15:22,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:15:22,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:15:22,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:15:22,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:15:22,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:15:22,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:15:22,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:15:22,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:15:22,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:15:22,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:15:22,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:15:22,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:15:22,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:15:22,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:15:22,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:15:22,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:15:22,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:15:22,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:15:22,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:15:22,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:15:22,790 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:15:22,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:15:22,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:15:22,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:15:22,792 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:15:22,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:15:22,792 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:15:22,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:15:22,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:15:22,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:15:22,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:15:22,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:15:22,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:15:22,794 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:15:22,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:15:22,794 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:15:22,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:15:22,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:15:22,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:15:22,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:15:22,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:15:22,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:15:22,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:15:22,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:15:22,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:15:22,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:15:22,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:15:22,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:15:22,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:15:23,095 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:15:23,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:15:23,112 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:15:23,113 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:15:23,113 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:15:23,114 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2019-10-13 19:15:23,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea561cbbd/3ba621481ae344eba1e2152c90a31915/FLAGd0dbc45da [2019-10-13 19:15:23,639 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:15:23,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2019-10-13 19:15:23,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea561cbbd/3ba621481ae344eba1e2152c90a31915/FLAGd0dbc45da [2019-10-13 19:15:24,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea561cbbd/3ba621481ae344eba1e2152c90a31915 [2019-10-13 19:15:24,057 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:15:24,059 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:15:24,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:24,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:15:24,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:15:24,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:24" (1/1) ... [2019-10-13 19:15:24,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0f51fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24, skipping insertion in model container [2019-10-13 19:15:24,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:24" (1/1) ... [2019-10-13 19:15:24,074 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:15:24,089 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:15:24,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:24,282 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:15:24,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:24,308 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:15:24,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24 WrapperNode [2019-10-13 19:15:24,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:24,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:15:24,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:15:24,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:15:24,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24" (1/1) ... [2019-10-13 19:15:24,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24" (1/1) ... [2019-10-13 19:15:24,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24" (1/1) ... [2019-10-13 19:15:24,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24" (1/1) ... [2019-10-13 19:15:24,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24" (1/1) ... [2019-10-13 19:15:24,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24" (1/1) ... [2019-10-13 19:15:24,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24" (1/1) ... [2019-10-13 19:15:24,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:15:24,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:15:24,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:15:24,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:15:24,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24" (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 [2019-10-13 19:15:24,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:15:24,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:15:24,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:15:24,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:15:24,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:15:24,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:15:24,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:15:24,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:15:24,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:15:24,647 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:15:24,648 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 19:15:24,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:24 BoogieIcfgContainer [2019-10-13 19:15:24,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:15:24,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:15:24,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:15:24,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:15:24,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:24" (1/3) ... [2019-10-13 19:15:24,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bbbe53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:24, skipping insertion in model container [2019-10-13 19:15:24,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:24" (2/3) ... [2019-10-13 19:15:24,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bbbe53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:24, skipping insertion in model container [2019-10-13 19:15:24,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:24" (3/3) ... [2019-10-13 19:15:24,657 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2019-10-13 19:15:24,667 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:15:24,673 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:15:24,683 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:15:24,707 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:15:24,707 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:15:24,708 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:15:24,708 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:15:24,708 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:15:24,708 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:15:24,708 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:15:24,709 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:15:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-13 19:15:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 19:15:24,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:24,729 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:24,731 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-10-13 19:15:24,742 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:24,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806545585] [2019-10-13 19:15:24,742 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:24,742 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:24,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:24,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806545585] [2019-10-13 19:15:24,968 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:24,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:15:24,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026344874] [2019-10-13 19:15:24,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:15:24,977 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:24,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:15:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:15:25,001 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-13 19:15:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:25,038 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-10-13 19:15:25,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:15:25,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-13 19:15:25,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:25,050 INFO L225 Difference]: With dead ends: 29 [2019-10-13 19:15:25,050 INFO L226 Difference]: Without dead ends: 12 [2019-10-13 19:15:25,054 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:15:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-13 19:15:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-13 19:15:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-13 19:15:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-13 19:15:25,094 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-13 19:15:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:25,094 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-13 19:15:25,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:15:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-13 19:15:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 19:15:25,096 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:25,096 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:25,096 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:25,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-10-13 19:15:25,097 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:25,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141146852] [2019-10-13 19:15:25,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:25,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:25,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:25,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141146852] [2019-10-13 19:15:25,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522090825] [2019-10-13 19:15:25,201 INFO L94 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 [2019-10-13 19:15:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:25,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:15:25,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:25,288 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:25,288 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-13 19:15:25,289 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943637364] [2019-10-13 19:15:25,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:15:25,291 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:15:25,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:15:25,292 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-10-13 19:15:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:25,326 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-13 19:15:25,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:15:25,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-10-13 19:15:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:25,328 INFO L225 Difference]: With dead ends: 18 [2019-10-13 19:15:25,328 INFO L226 Difference]: Without dead ends: 13 [2019-10-13 19:15:25,329 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:15:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-13 19:15:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-13 19:15:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-13 19:15:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-13 19:15:25,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-13 19:15:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:25,335 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-13 19:15:25,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:15:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-13 19:15:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 19:15:25,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:25,336 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:25,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:25,542 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:25,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-10-13 19:15:25,544 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:25,544 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397986640] [2019-10-13 19:15:25,544 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:25,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:25,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:25,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397986640] [2019-10-13 19:15:25,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082053262] [2019-10-13 19:15:25,674 INFO L92 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 [2019-10-13 19:15:25,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:15:25,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:25,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:15:25,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:25,743 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:25,743 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-13 19:15:25,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557975981] [2019-10-13 19:15:25,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:15:25,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:25,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:15:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:15:25,745 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-10-13 19:15:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:25,777 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-13 19:15:25,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:15:25,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-13 19:15:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:25,778 INFO L225 Difference]: With dead ends: 19 [2019-10-13 19:15:25,779 INFO L226 Difference]: Without dead ends: 14 [2019-10-13 19:15:25,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:15:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-13 19:15:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-13 19:15:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-13 19:15:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-13 19:15:25,784 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-13 19:15:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:25,784 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-13 19:15:25,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:15:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-13 19:15:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 19:15:25,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:25,786 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:25,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:25,989 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:25,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2019-10-13 19:15:25,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:25,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074488518] [2019-10-13 19:15:25,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:25,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:25,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:26,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074488518] [2019-10-13 19:15:26,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135056331] [2019-10-13 19:15:26,128 INFO L92 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 [2019-10-13 19:15:26,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:15:26,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:26,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 19:15:26,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:26,196 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:26,196 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-13 19:15:26,196 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226991304] [2019-10-13 19:15:26,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:15:26,197 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:26,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:15:26,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:15:26,198 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2019-10-13 19:15:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:26,240 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-13 19:15:26,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:15:26,242 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-10-13 19:15:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:26,242 INFO L225 Difference]: With dead ends: 20 [2019-10-13 19:15:26,243 INFO L226 Difference]: Without dead ends: 15 [2019-10-13 19:15:26,243 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:15:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-13 19:15:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-13 19:15:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-13 19:15:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-13 19:15:26,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-13 19:15:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:26,248 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-13 19:15:26,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:15:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-13 19:15:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:15:26,249 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:26,250 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:26,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:26,459 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:26,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2019-10-13 19:15:26,460 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:26,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641537181] [2019-10-13 19:15:26,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:26,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:26,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:26,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641537181] [2019-10-13 19:15:26,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227838341] [2019-10-13 19:15:26,579 INFO L92 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) [2019-10-13 19:15:26,621 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:15:26,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:26,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 19:15:26,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:26,662 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:26,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-13 19:15:26,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697815241] [2019-10-13 19:15:26,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:15:26,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:15:26,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:15:26,664 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2019-10-13 19:15:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:26,713 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-13 19:15:26,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:15:26,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-10-13 19:15:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:26,714 INFO L225 Difference]: With dead ends: 21 [2019-10-13 19:15:26,715 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 19:15:26,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:15:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 19:15:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 19:15:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 19:15:26,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-13 19:15:26,720 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-13 19:15:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:26,720 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-13 19:15:26,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:15:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-13 19:15:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:15:26,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:26,721 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:26,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:26,926 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:26,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:26,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2019-10-13 19:15:26,927 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:26,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314739549] [2019-10-13 19:15:26,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:26,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:26,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:27,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314739549] [2019-10-13 19:15:27,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514144070] [2019-10-13 19:15:27,067 INFO L92 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 [2019-10-13 19:15:27,101 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 19:15:27,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:27,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:15:27,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:27,138 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:27,139 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-13 19:15:27,139 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843305923] [2019-10-13 19:15:27,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:15:27,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:27,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:15:27,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:27,140 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2019-10-13 19:15:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:27,201 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-13 19:15:27,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:15:27,203 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-10-13 19:15:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:27,205 INFO L225 Difference]: With dead ends: 22 [2019-10-13 19:15:27,205 INFO L226 Difference]: Without dead ends: 17 [2019-10-13 19:15:27,206 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-13 19:15:27,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-13 19:15:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-13 19:15:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-13 19:15:27,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-10-13 19:15:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:27,214 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-13 19:15:27,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:15:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-13 19:15:27,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:15:27,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:27,217 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:27,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:27,420 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2019-10-13 19:15:27,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:27,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153816778] [2019-10-13 19:15:27,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:27,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:27,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,588 WARN L838 $PredicateComparison]: unable to prove that (<= (* 268435456 (div (+ (* c_main_~y~0 178956971) 357913939) 268435456)) (+ (* 178956971 c_main_~y~0) 89478484)) is different from false [2019-10-13 19:15:38,229 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 12 [2019-10-13 19:15:40,621 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 18 [2019-10-13 19:15:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2019-10-13 19:15:48,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153816778] [2019-10-13 19:15:48,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832581912] [2019-10-13 19:15:48,705 INFO L92 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 [2019-10-13 19:15:48,747 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 19:15:48,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:48,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 19:15:48,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:10,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:10,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:10,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:10,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:10,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms