/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/nla-digbench/ps5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:36:51,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:36:51,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:36:51,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 00:36:51,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:36:51,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:36:51,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:36:51,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:36:51,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:36:51,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:36:51,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:36:51,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:36:51,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:36:51,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:36:51,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:36:51,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:36:51,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:36:51,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:36:51,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:36:51,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:36:51,532 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 [2019-11-07 00:36:51,555 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:36:51,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:36:51,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:36:51,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:36:51,557 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:36:51,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:36:51,559 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:36:51,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:36:51,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:36:51,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:36:51,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:36:51,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:36:51,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:36:51,564 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:36:51,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:36:51,564 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:36:51,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:36:51,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:36:51,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:36:51,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:36:51,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:36:51,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:36:51,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:36:51,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:36:51,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:36:51,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:36:51,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:36:51,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:36:51,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:36:51,830 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:36:51,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:36:51,851 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:36:51,852 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:36:51,853 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:36:51,853 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps5.c [2019-11-07 00:36:51,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1226a43b6/af979211e96e45ff80f6faebbeb324a1/FLAG62340b201 [2019-11-07 00:36:52,372 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:36:52,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps5.c [2019-11-07 00:36:52,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1226a43b6/af979211e96e45ff80f6faebbeb324a1/FLAG62340b201 [2019-11-07 00:36:52,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1226a43b6/af979211e96e45ff80f6faebbeb324a1 [2019-11-07 00:36:52,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:36:52,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:36:52,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:36:52,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:36:52,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:36:52,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:36:52" (1/1) ... [2019-11-07 00:36:52,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128aa138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:52, skipping insertion in model container [2019-11-07 00:36:52,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:36:52" (1/1) ... [2019-11-07 00:36:52,809 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:36:52,827 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:36:53,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:36:53,065 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:36:53,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:36:53,117 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:36:53,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:53 WrapperNode [2019-11-07 00:36:53,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:36:53,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:36:53,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:36:53,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:36:53,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:53" (1/1) ... [2019-11-07 00:36:53,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:53" (1/1) ... [2019-11-07 00:36:53,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:53" (1/1) ... [2019-11-07 00:36:53,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:53" (1/1) ... [2019-11-07 00:36:53,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:53" (1/1) ... [2019-11-07 00:36:53,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:53" (1/1) ... [2019-11-07 00:36:53,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:53" (1/1) ... [2019-11-07 00:36:53,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:36:53,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:36:53,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:36:53,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:36:53,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:53" (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 [2019-11-07 00:36:53,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:36:53,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:36:53,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 00:36:53,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:36:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:36:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:36:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 00:36:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:36:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:36:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:36:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:36:53,546 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:36:53,546 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 00:36:53,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:36:53 BoogieIcfgContainer [2019-11-07 00:36:53,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:36:53,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:36:53,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:36:53,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:36:53,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:36:52" (1/3) ... [2019-11-07 00:36:53,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3196cfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:36:53, skipping insertion in model container [2019-11-07 00:36:53,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:53" (2/3) ... [2019-11-07 00:36:53,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3196cfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:36:53, skipping insertion in model container [2019-11-07 00:36:53,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:36:53" (3/3) ... [2019-11-07 00:36:53,562 INFO L109 eAbstractionObserver]: Analyzing ICFG ps5.c [2019-11-07 00:36:53,573 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:36:53,587 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:36:53,611 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:36:53,649 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:36:53,649 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:36:53,649 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:36:53,650 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:36:53,650 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:36:53,650 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:36:53,650 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:36:53,650 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:36:53,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-07 00:36:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 00:36:53,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:36:53,691 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:36:53,693 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:36:53,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:53,700 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-11-07 00:36:53,711 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:36:53,711 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962853831] [2019-11-07 00:36:53,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:36:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:36:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:36:53,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962853831] [2019-11-07 00:36:53,813 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:36:53,814 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 00:36:53,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740550643] [2019-11-07 00:36:53,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:36:53,820 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:36:53,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:36:53,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 00:36:53,834 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-07 00:36:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:36:53,857 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-11-07 00:36:53,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:36:53,858 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-07 00:36:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:36:53,868 INFO L225 Difference]: With dead ends: 37 [2019-11-07 00:36:53,868 INFO L226 Difference]: Without dead ends: 16 [2019-11-07 00:36:53,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 00:36:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-07 00:36:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-07 00:36:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-07 00:36:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-07 00:36:53,912 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-07 00:36:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:36:53,913 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-07 00:36:53,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:36:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-07 00:36:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 00:36:53,915 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:36:53,915 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:36:53,915 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:36:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:53,916 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-11-07 00:36:53,916 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:36:53,917 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164890265] [2019-11-07 00:36:53,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:36:53,924 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 00:36:53,924 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936406023] [2019-11-07 00:36:53,925 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 [2019-11-07 00:36:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:36:53,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 00:36:53,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:36:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:36:54,042 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:36:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:36:54,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164890265] [2019-11-07 00:36:54,222 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:36:54,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936406023] [2019-11-07 00:36:54,222 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:36:54,223 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-07 00:36:54,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137700469] [2019-11-07 00:36:54,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:36:54,225 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:36:54,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:36:54,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:36:54,226 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-11-07 00:36:54,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:36:54,441 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-11-07 00:36:54,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:36:54,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-11-07 00:36:54,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:36:54,443 INFO L225 Difference]: With dead ends: 27 [2019-11-07 00:36:54,443 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 00:36:54,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:36:54,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 00:36:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 00:36:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 00:36:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-07 00:36:54,453 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2019-11-07 00:36:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:36:54,453 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-07 00:36:54,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:36:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-07 00:36:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 00:36:54,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:36:54,455 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:36:54,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:36:54,658 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:36:54,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:54,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-11-07 00:36:54,659 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:36:54,660 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304004808] [2019-11-07 00:36:54,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:36:54,670 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 00:36:54,670 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522031574] [2019-11-07 00:36:54,671 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 [2019-11-07 00:36:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:36:54,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-07 00:36:54,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:36:54,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:36:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 00:36:54,894 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:36:59,359 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-07 00:36:59,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:37:01,382 WARN L838 $PredicateComparison]: unable to prove that (or (not (= 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)))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (let ((.cse0 (+ c_main_~y~0 1))) (= (* main_~k~0 .cse0) (* .cse0 .cse0))) (<= main_~k~0 c_main_~c~0)))) is different from false [2019-11-07 00:37:01,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:37:03,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:37:07,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:37:14,959 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((main_~k~0 Int) (v_main_~y~0_BEFORE_CALL_8 Int)) (or (= 0 (mod (+ (* (* (* (* v_main_~y~0_BEFORE_CALL_8 10) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_8 6) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) (* (* (* (* (* v_main_~y~0_BEFORE_CALL_8 15) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) v_main_~y~0_BEFORE_CALL_8) (- 30))) (let ((.cse0 (+ v_main_~y~0_BEFORE_CALL_8 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0)))))) is different from true [2019-11-07 00:37:24,994 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((main_~k~0 Int) (v_main_~y~0_BEFORE_CALL_8 Int)) (or (= 0 (mod (+ (* (* (* (* v_main_~y~0_BEFORE_CALL_8 10) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_8 6) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) (* (* (* (* (* v_main_~y~0_BEFORE_CALL_8 15) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) v_main_~y~0_BEFORE_CALL_8) (- 30))) (let ((.cse0 (+ v_main_~y~0_BEFORE_CALL_8 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (= 0 c___VERIFIER_assert_~cond)) is different from true [2019-11-07 00:37:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 1 refuted. 6 times theorem prover too weak. 6 trivial. 3 not checked. [2019-11-07 00:37:25,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304004808] [2019-11-07 00:37:25,019 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:37:25,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522031574] [2019-11-07 00:37:25,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1086410522] [2019-11-07 00:37:25,030 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 29 [2019-11-07 00:37:25,076 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-07 00:37:25,076 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-07 00:37:25,220 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-11-07 00:37:25,221 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 12 root evaluator evaluations with a maximum evaluation depth of 13. Performed 12 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 5 variables. [2019-11-07 00:37:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:37:25,225 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:37:25,226 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:37:25,226 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2019-11-07 00:37:25,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72424045] [2019-11-07 00:37:25,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-07 00:37:25,227 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:37:25,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-07 00:37:25,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=125, Unknown=5, NotChecked=72, Total=240 [2019-11-07 00:37:25,228 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 16 states. [2019-11-07 00:37:43,785 WARN L191 SmtUtils]: Spent 7.34 s on a formula simplification that was a NOOP. DAG size: 19