/usr/bin/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/nla-digbench/ps5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:26:38,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:26:38,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:26:38,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:26:38,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:26:38,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:26:38,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:26:38,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:26:38,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:26:38,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:26:38,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:26:38,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:26:38,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:26:38,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:26:38,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:26:38,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:26:38,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:26:38,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:26:38,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:26:38,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:26:38,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:26:38,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:26:38,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:26:38,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:26:38,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:26:38,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:26:38,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:26:38,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:26:38,495 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 [2019-11-06 21:26:38,508 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:26:38,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:26:38,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:26:38,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:26:38,510 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:26:38,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:26:38,511 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:26:38,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:26:38,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:26:38,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:26:38,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:26:38,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:26:38,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:26:38,512 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:26:38,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:26:38,513 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:26:38,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:26:38,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:26:38,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:26:38,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:26:38,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:26:38,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:26:38,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:26:38,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:26:38,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:26:38,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:26:38,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:26:38,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:26:38,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:26:38,820 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:26:38,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:26:38,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:26:38,848 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:26:38,848 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:26:38,849 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps5.c [2019-11-06 21:26:38,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6db1f116/7b4d47f048ee44ca9c01d2579df9d2a8/FLAG77dbae048 [2019-11-06 21:26:39,355 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:26:39,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps5.c [2019-11-06 21:26:39,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6db1f116/7b4d47f048ee44ca9c01d2579df9d2a8/FLAG77dbae048 [2019-11-06 21:26:39,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6db1f116/7b4d47f048ee44ca9c01d2579df9d2a8 [2019-11-06 21:26:39,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:26:39,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:26:39,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:26:39,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:26:39,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:26:39,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:39,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78bcaca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:39, skipping insertion in model container [2019-11-06 21:26:39,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:26:39" (1/1) ... [2019-11-06 21:26:39,785 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:26:39,804 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:26:40,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:26:40,041 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:26:40,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:26:40,074 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:26:40,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:40 WrapperNode [2019-11-06 21:26:40,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:26:40,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:26:40,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:26:40,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:26:40,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:40" (1/1) ... [2019-11-06 21:26:40,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:40" (1/1) ... [2019-11-06 21:26:40,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:40" (1/1) ... [2019-11-06 21:26:40,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:40" (1/1) ... [2019-11-06 21:26:40,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:40" (1/1) ... [2019-11-06 21:26:40,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:40" (1/1) ... [2019-11-06 21:26:40,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:40" (1/1) ... [2019-11-06 21:26:40,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:26:40,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:26:40,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:26:40,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:26:40,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:40" (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 [2019-11-06 21:26:40,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:26:40,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:26:40,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:26:40,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:26:40,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:26:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:26:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:26:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:26:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:26:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:26:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:26:40,424 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:26:40,425 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:26:40,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:26:40 BoogieIcfgContainer [2019-11-06 21:26:40,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:26:40,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:26:40,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:26:40,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:26:40,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:26:39" (1/3) ... [2019-11-06 21:26:40,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e00827e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:26:40, skipping insertion in model container [2019-11-06 21:26:40,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:40" (2/3) ... [2019-11-06 21:26:40,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e00827e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:26:40, skipping insertion in model container [2019-11-06 21:26:40,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:26:40" (3/3) ... [2019-11-06 21:26:40,434 INFO L109 eAbstractionObserver]: Analyzing ICFG ps5.c [2019-11-06 21:26:40,445 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:26:40,453 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:26:40,466 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:26:40,525 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:26:40,526 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:26:40,526 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:26:40,526 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:26:40,526 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:26:40,526 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:26:40,527 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:26:40,527 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:26:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-06 21:26:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:26:40,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:40,563 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:40,565 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:40,572 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-11-06 21:26:40,582 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:40,582 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053731874] [2019-11-06 21:26:40,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:40,699 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053731874] [2019-11-06 21:26:40,700 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:40,701 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 21:26:40,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634813877] [2019-11-06 21:26:40,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:26:40,708 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:26:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:26:40,723 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-06 21:26:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:40,744 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-11-06 21:26:40,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:26:40,746 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-06 21:26:40,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:40,754 INFO L225 Difference]: With dead ends: 37 [2019-11-06 21:26:40,754 INFO L226 Difference]: Without dead ends: 16 [2019-11-06 21:26:40,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:26:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-06 21:26:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-06 21:26:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-06 21:26:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-06 21:26:40,797 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-06 21:26:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:40,798 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-06 21:26:40,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:26:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-06 21:26:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:26:40,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:40,800 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:40,800 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-11-06 21:26:40,801 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:40,802 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8649614] [2019-11-06 21:26:40,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:40,809 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:40,809 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059789901] [2019-11-06 21:26:40,809 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 [2019-11-06 21:26:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:40,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 21:26:40,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:40,919 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8649614] [2019-11-06 21:26:40,920 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:40,920 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059789901] [2019-11-06 21:26:40,920 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:40,920 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:26:40,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692631155] [2019-11-06 21:26:40,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:26:40,923 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:40,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:26:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:26:40,924 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-11-06 21:26:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:41,148 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-11-06 21:26:41,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:26:41,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-06 21:26:41,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:41,150 INFO L225 Difference]: With dead ends: 27 [2019-11-06 21:26:41,150 INFO L226 Difference]: Without dead ends: 23 [2019-11-06 21:26:41,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:26:41,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-06 21:26:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-06 21:26:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 21:26:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-06 21:26:41,161 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-11-06 21:26:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:41,162 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-06 21:26:41,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:26:41,162 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-06 21:26:41,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 21:26:41,163 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:41,163 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:41,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:41,369 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:41,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-11-06 21:26:41,371 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:41,371 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106193079] [2019-11-06 21:26:41,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:41,378 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:41,378 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922434603] [2019-11-06 21:26:41,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 21:26:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:41,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 21:26:41,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:41,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106193079] [2019-11-06 21:26:41,522 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:41,522 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922434603] [2019-11-06 21:26:41,523 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:41,523 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 21:26:41,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358822642] [2019-11-06 21:26:41,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:26:41,524 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:41,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:26:41,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:26:41,525 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-11-06 21:26:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:41,989 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-06 21:26:41,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:26:41,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-06 21:26:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:41,992 INFO L225 Difference]: With dead ends: 34 [2019-11-06 21:26:41,992 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 21:26:41,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 21:26:42,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-06 21:26:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 21:26:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-11-06 21:26:42,003 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2019-11-06 21:26:42,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:42,003 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-11-06 21:26:42,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:26:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-11-06 21:26:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 21:26:42,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:42,005 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:42,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:42,209 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:42,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-11-06 21:26:42,210 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:42,211 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893606891] [2019-11-06 21:26:42,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:42,218 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:42,219 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272294059] [2019-11-06 21:26:42,219 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 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 [2019-11-06 21:26:42,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:26:42,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:42,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:26:42,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:26:42,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893606891] [2019-11-06 21:26:42,393 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:42,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272294059] [2019-11-06 21:26:42,393 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:42,393 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:26:42,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459284813] [2019-11-06 21:26:42,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:26:42,394 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:42,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:26:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:26:42,395 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-11-06 21:26:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:42,842 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-11-06 21:26:42,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:26:42,844 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-11-06 21:26:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:42,846 INFO L225 Difference]: With dead ends: 43 [2019-11-06 21:26:42,846 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 21:26:42,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:26:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 21:26:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 21:26:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 21:26:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-11-06 21:26:42,862 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-11-06 21:26:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:42,862 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-11-06 21:26:42,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:26:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-11-06 21:26:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:26:42,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:42,864 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:43,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:43,071 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-11-06 21:26:43,072 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:43,073 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273657929] [2019-11-06 21:26:43,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:43,081 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:43,081 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253059555] [2019-11-06 21:26:43,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 21:26:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:43,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 21:26:43,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:45,155 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~y~0 0) (= 0 (mod (+ (* (* (* (* c_main_~y~0 10) c_main_~y~0) c_main_~y~0) 29) c_main_~y~0 (* (* (* (* (* c_main_~y~0 15) c_main_~y~0) c_main_~y~0) c_main_~y~0) 29) (* (* (* (* (* (* c_main_~y~0 6) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) 29)) (- 30))) (= c_main_~c~0 0)) is different from true [2019-11-06 21:26:47,191 WARN L860 $PredicateComparison]: unable to prove that (and (<= c_main_~c~0 1) (= c_main_~y~0 1) (= (mod (let ((.cse0 (+ c_main_~y~0 (- 1)))) (+ (* (* (* (* (* (+ (* c_main_~y~0 6) (- 6)) .cse0) .cse0) .cse0) .cse0) 29) c_main_~y~0 (* (* (* (* (+ (* c_main_~y~0 15) (- 15)) .cse0) .cse0) .cse0) 29) (* (* (* (+ (* c_main_~y~0 10) (- 10)) .cse0) .cse0) 29) 29)) (- 30)) 0) (< 0 c_main_~k~0)) is different from true [2019-11-06 21:26:51,256 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 39 DAG size of output: 8 [2019-11-06 21:26:51,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2019-11-06 21:26:51,335 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273657929] [2019-11-06 21:26:51,336 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:51,336 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253059555] [2019-11-06 21:26:51,336 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:51,336 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:51,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238803791] [2019-11-06 21:26:51,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:51,337 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:51,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:51,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=43, Unknown=3, NotChecked=26, Total=90 [2019-11-06 21:26:51,338 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2019-11-06 21:26:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:51,449 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-11-06 21:26:51,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:26:51,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-06 21:26:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:51,453 INFO L225 Difference]: With dead ends: 46 [2019-11-06 21:26:51,453 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 21:26:51,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=29, Invalid=66, Unknown=3, NotChecked=34, Total=132 [2019-11-06 21:26:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 21:26:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-06 21:26:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 21:26:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-06 21:26:51,463 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2019-11-06 21:26:51,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:51,463 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-06 21:26:51,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:26:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-06 21:26:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 21:26:51,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:51,465 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:51,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:51,669 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:51,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:51,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-11-06 21:26:51,670 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:51,670 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491756006] [2019-11-06 21:26:51,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:51,676 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:51,677 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264759267] [2019-11-06 21:26:51,677 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 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 [2019-11-06 21:26:51,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:26:51,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:51,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 21:26:51,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:52,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 21:26:53,033 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491756006] [2019-11-06 21:26:53,033 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:53,033 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264759267] [2019-11-06 21:26:53,034 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:53,034 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:26:53,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838734572] [2019-11-06 21:26:53,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:26:53,035 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:53,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:26:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:26:53,035 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2019-11-06 21:26:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:53,194 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-11-06 21:26:53,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:26:53,194 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-11-06 21:26:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:53,196 INFO L225 Difference]: With dead ends: 44 [2019-11-06 21:26:53,196 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 21:26:53,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:26:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 21:26:53,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2019-11-06 21:26:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 21:26:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-06 21:26:53,204 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 31 [2019-11-06 21:26:53,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:53,205 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-06 21:26:53,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:26:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-06 21:26:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 21:26:53,206 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:53,206 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:53,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:53,416 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:53,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:53,417 INFO L82 PathProgramCache]: Analyzing trace with hash 787245325, now seen corresponding path program 2 times [2019-11-06 21:26:53,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:53,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424731642] [2019-11-06 21:26:53,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:53,423 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:53,423 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773939791] [2019-11-06 21:26:53,424 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 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 [2019-11-06 21:26:53,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:26:53,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:53,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 21:26:53,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:53,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:26:53,578 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424731642] [2019-11-06 21:26:53,578 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:53,578 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773939791] [2019-11-06 21:26:53,579 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:53,579 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:53,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216283559] [2019-11-06 21:26:53,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:53,580 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:53,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:53,581 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 10 states. [2019-11-06 21:26:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:53,760 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-11-06 21:26:53,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:26:53,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-11-06 21:26:53,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:53,762 INFO L225 Difference]: With dead ends: 41 [2019-11-06 21:26:53,762 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 21:26:53,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:26:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 21:26:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-06 21:26:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 21:26:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-06 21:26:53,771 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 35 [2019-11-06 21:26:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:53,771 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-06 21:26:53,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:26:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-06 21:26:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 21:26:53,773 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:53,773 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:53,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:53,985 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:53,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:53,986 INFO L82 PathProgramCache]: Analyzing trace with hash -999891931, now seen corresponding path program 3 times [2019-11-06 21:26:53,986 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:53,987 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749991415] [2019-11-06 21:26:53,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:53,993 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:53,993 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432411884] [2019-11-06 21:26:53,993 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 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 [2019-11-06 21:26:54,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 21:26:54,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:54,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 21:26:54,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:54,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 21:26:54,204 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749991415] [2019-11-06 21:26:54,204 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:54,205 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432411884] [2019-11-06 21:26:54,205 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:54,205 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 21:26:54,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420156653] [2019-11-06 21:26:54,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:26:54,206 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:54,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:26:54,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:26:54,207 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2019-11-06 21:26:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:54,388 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2019-11-06 21:26:54,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:26:54,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2019-11-06 21:26:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:54,390 INFO L225 Difference]: With dead ends: 44 [2019-11-06 21:26:54,390 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 21:26:54,391 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:26:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 21:26:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-06 21:26:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 21:26:54,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-11-06 21:26:54,398 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 42 [2019-11-06 21:26:54,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:54,398 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-11-06 21:26:54,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:26:54,399 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-11-06 21:26:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 21:26:54,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:54,402 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:54,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:54,607 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:54,607 INFO L82 PathProgramCache]: Analyzing trace with hash -705610227, now seen corresponding path program 4 times [2019-11-06 21:26:54,608 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:54,608 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903680559] [2019-11-06 21:26:54,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:54,613 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:54,613 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407599683] [2019-11-06 21:26:54,614 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 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 [2019-11-06 21:26:54,648 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:26:54,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:54,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 21:26:54,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:54,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-06 21:26:54,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903680559] [2019-11-06 21:26:54,790 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:54,791 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407599683] [2019-11-06 21:26:54,791 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:54,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 21:26:54,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960075279] [2019-11-06 21:26:54,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:26:54,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:54,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:26:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:26:54,792 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2019-11-06 21:26:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:54,980 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-06 21:26:54,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:26:54,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-06 21:26:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:54,981 INFO L225 Difference]: With dead ends: 47 [2019-11-06 21:26:54,981 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 21:26:54,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:26:54,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 21:26:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-06 21:26:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 21:26:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 21:26:54,990 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 49 [2019-11-06 21:26:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:54,990 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 21:26:54,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:26:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 21:26:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 21:26:54,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:54,992 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:55,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:55,204 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1261987621, now seen corresponding path program 5 times [2019-11-06 21:26:55,205 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:55,205 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79738676] [2019-11-06 21:26:55,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:55,210 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:55,211 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532579340] [2019-11-06 21:26:55,211 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 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 [2019-11-06 21:27:24,274 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 21:27:24,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:24,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-06 21:27:24,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:24,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 21:27:24,440 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79738676] [2019-11-06 21:27:24,441 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:24,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532579340] [2019-11-06 21:27:24,441 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:24,441 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-06 21:27:24,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744729762] [2019-11-06 21:27:24,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 21:27:24,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:24,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 21:27:24,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:27:24,445 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2019-11-06 21:27:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:24,660 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-11-06 21:27:24,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 21:27:24,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-11-06 21:27:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:24,662 INFO L225 Difference]: With dead ends: 50 [2019-11-06 21:27:24,663 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 21:27:24,664 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:27:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 21:27:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-06 21:27:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 21:27:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2019-11-06 21:27:24,672 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 56 [2019-11-06 21:27:24,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:24,672 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2019-11-06 21:27:24,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 21:27:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2019-11-06 21:27:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 21:27:24,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:24,675 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:24,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:24,879 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:24,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1969050381, now seen corresponding path program 6 times [2019-11-06 21:27:24,880 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:24,880 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460128493] [2019-11-06 21:27:24,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:24,886 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:24,886 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124647099] [2019-11-06 21:27:24,886 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 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