/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/eca-rers2012/Problem02_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:32:31,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:32:31,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:32:31,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:32:31,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:32:31,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:32:31,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:32:31,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:32:31,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:32:31,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:32:31,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:32:31,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:32:31,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:32:31,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:32:31,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:32:31,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:32:31,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:32:31,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:32:31,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:32:31,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:32:31,716 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 22:32:31,736 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:32:31,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:32:31,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:32:31,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:32:31,739 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:32:31,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:32:31,740 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:32:31,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:32:31,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:32:31,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:32:31,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:32:31,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:32:31,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:32:31,743 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:32:31,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:32:31,743 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:32:31,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:32:31,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:32:31,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:32:31,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:32:31,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:32:31,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:32:31,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:32:31,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:32:31,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:32:31,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:32:31,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:32:31,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:32:31,745 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 [2019-11-06 22:32:32,041 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:32:32,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:32:32,060 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:32:32,062 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:32:32,062 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:32:32,063 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label02.c [2019-11-06 22:32:32,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a30cd2589/2c37b2b2c2044a12bf65f9900b6604c8/FLAG99700a4ee [2019-11-06 22:32:32,770 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:32:32,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label02.c [2019-11-06 22:32:32,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a30cd2589/2c37b2b2c2044a12bf65f9900b6604c8/FLAG99700a4ee [2019-11-06 22:32:32,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a30cd2589/2c37b2b2c2044a12bf65f9900b6604c8 [2019-11-06 22:32:32,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:32:32,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:32:32,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:32:32,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:32:32,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:32:32,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:32" (1/1) ... [2019-11-06 22:32:32,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cab38a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:32, skipping insertion in model container [2019-11-06 22:32:32,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:32" (1/1) ... [2019-11-06 22:32:32,997 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:32:33,058 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:32:33,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:32:33,585 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:32:33,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:32:33,692 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:32:33,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:33 WrapperNode [2019-11-06 22:32:33,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:32:33,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:32:33,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:32:33,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:32:33,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:33" (1/1) ... [2019-11-06 22:32:33,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:33" (1/1) ... [2019-11-06 22:32:33,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:33" (1/1) ... [2019-11-06 22:32:33,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:33" (1/1) ... [2019-11-06 22:32:33,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:33" (1/1) ... [2019-11-06 22:32:33,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:33" (1/1) ... [2019-11-06 22:32:33,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:33" (1/1) ... [2019-11-06 22:32:33,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:32:33,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:32:33,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:32:33,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:32:33,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:33" (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 22:32:33,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:32:33,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:32:33,867 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:32:33,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:32:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:32:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:32:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:32:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:32:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:32:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:32:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:32:35,083 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:32:35,084 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:32:35,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:35 BoogieIcfgContainer [2019-11-06 22:32:35,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:32:35,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:32:35,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:32:35,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:32:35,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:32:32" (1/3) ... [2019-11-06 22:32:35,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a7def7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:35, skipping insertion in model container [2019-11-06 22:32:35,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:33" (2/3) ... [2019-11-06 22:32:35,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a7def7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:35, skipping insertion in model container [2019-11-06 22:32:35,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:35" (3/3) ... [2019-11-06 22:32:35,094 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label02.c [2019-11-06 22:32:35,104 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:32:35,113 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:32:35,125 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:32:35,153 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:32:35,154 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:32:35,154 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:32:35,154 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:32:35,154 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:32:35,155 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:32:35,155 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:32:35,155 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:32:35,180 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:32:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 22:32:35,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:35,193 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:32:35,195 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:35,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1049075015, now seen corresponding path program 1 times [2019-11-06 22:32:35,211 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:35,212 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182183084] [2019-11-06 22:32:35,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:35,748 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 22:32:35,749 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182183084] [2019-11-06 22:32:35,750 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:35,751 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:32:35,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186474499] [2019-11-06 22:32:35,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:32:35,764 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:35,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:32:35,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:32:35,783 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 4 states. [2019-11-06 22:32:37,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:37,081 INFO L93 Difference]: Finished difference Result 784 states and 1369 transitions. [2019-11-06 22:32:37,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:32:37,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-11-06 22:32:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:37,101 INFO L225 Difference]: With dead ends: 784 [2019-11-06 22:32:37,102 INFO L226 Difference]: Without dead ends: 472 [2019-11-06 22:32:37,114 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:32:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-11-06 22:32:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 321. [2019-11-06 22:32:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:32:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 468 transitions. [2019-11-06 22:32:37,185 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 468 transitions. Word has length 99 [2019-11-06 22:32:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:37,186 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 468 transitions. [2019-11-06 22:32:37,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:32:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 468 transitions. [2019-11-06 22:32:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 22:32:37,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:37,193 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:32:37,193 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash 30248894, now seen corresponding path program 1 times [2019-11-06 22:32:37,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:37,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872435421] [2019-11-06 22:32:37,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:37,347 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872435421] [2019-11-06 22:32:37,347 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:37,347 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:32:37,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452683757] [2019-11-06 22:32:37,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:32:37,350 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:37,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:32:37,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:32:37,350 INFO L87 Difference]: Start difference. First operand 321 states and 468 transitions. Second operand 3 states. [2019-11-06 22:32:37,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:37,944 INFO L93 Difference]: Finished difference Result 934 states and 1385 transitions. [2019-11-06 22:32:37,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:32:37,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-11-06 22:32:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:37,952 INFO L225 Difference]: With dead ends: 934 [2019-11-06 22:32:37,952 INFO L226 Difference]: Without dead ends: 619 [2019-11-06 22:32:37,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:32:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-11-06 22:32:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 614. [2019-11-06 22:32:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-11-06 22:32:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 861 transitions. [2019-11-06 22:32:37,995 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 861 transitions. Word has length 107 [2019-11-06 22:32:37,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:37,996 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 861 transitions. [2019-11-06 22:32:37,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:32:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 861 transitions. [2019-11-06 22:32:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 22:32:38,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:38,002 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:32:38,002 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash 183684818, now seen corresponding path program 1 times [2019-11-06 22:32:38,002 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:38,003 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413320962] [2019-11-06 22:32:38,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:32:38,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413320962] [2019-11-06 22:32:38,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171359908] [2019-11-06 22:32:38,171 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 22:32:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:38,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:32:38,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:32:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:38,379 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:32:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:38,474 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1713023863] [2019-11-06 22:32:38,480 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 137 [2019-11-06 22:32:38,520 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:32:38,521 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)