/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/Problem01_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:29:49,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:29:49,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:29:49,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:29:49,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:29:49,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:29:49,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:29:49,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:29:49,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:29:49,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:29:49,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:29:49,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:29:49,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:29:49,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:29:49,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:29:49,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:29:49,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:29:49,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:29:49,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:29:49,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:29:49,650 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 22:29:49,674 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:29:49,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:29:49,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:29:49,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:29:49,676 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:29:49,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:29:49,676 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:29:49,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:29:49,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:29:49,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:29:49,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:29:49,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:29:49,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:29:49,679 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:29:49,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:29:49,681 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:29:49,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:29:49,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:29:49,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:29:49,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:29:49,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:29:49,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:29:49,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:29:49,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:29:49,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:29:49,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:29:49,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:29:49,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:29:49,684 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 22:29:49,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:29:49,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:29:49,990 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:29:49,991 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:29:49,992 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:29:49,992 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label25.c [2019-11-06 22:29:50,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439b62ea4/814e71ecdd7d462c88d124f3f60d5161/FLAGb8b4f5972 [2019-11-06 22:29:50,629 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:29:50,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label25.c [2019-11-06 22:29:50,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439b62ea4/814e71ecdd7d462c88d124f3f60d5161/FLAGb8b4f5972 [2019-11-06 22:29:50,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439b62ea4/814e71ecdd7d462c88d124f3f60d5161 [2019-11-06 22:29:50,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:29:50,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:29:50,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:50,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:29:50,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:29:50,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:50" (1/1) ... [2019-11-06 22:29:50,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5915ca50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:50, skipping insertion in model container [2019-11-06 22:29:50,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:50" (1/1) ... [2019-11-06 22:29:50,966 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:29:51,019 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:29:51,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:51,521 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:29:51,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:51,674 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:29:51,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:51 WrapperNode [2019-11-06 22:29:51,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:51,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:29:51,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:29:51,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:29:51,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:51" (1/1) ... [2019-11-06 22:29:51,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:51" (1/1) ... [2019-11-06 22:29:51,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:51" (1/1) ... [2019-11-06 22:29:51,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:51" (1/1) ... [2019-11-06 22:29:51,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:51" (1/1) ... [2019-11-06 22:29:51,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:51" (1/1) ... [2019-11-06 22:29:51,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:51" (1/1) ... [2019-11-06 22:29:51,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:29:51,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:29:51,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:29:51,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:29:51,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:51" (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 22:29:51,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:29:51,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:29:51,838 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:29:51,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:29:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:29:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:29:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:29:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:29:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:29:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:29:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:29:52,935 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:29:52,935 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:29:52,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:52 BoogieIcfgContainer [2019-11-06 22:29:52,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:29:52,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:29:52,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:29:52,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:29:52,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:50" (1/3) ... [2019-11-06 22:29:52,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ccb90ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:52, skipping insertion in model container [2019-11-06 22:29:52,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:51" (2/3) ... [2019-11-06 22:29:52,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ccb90ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:52, skipping insertion in model container [2019-11-06 22:29:52,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:52" (3/3) ... [2019-11-06 22:29:52,953 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label25.c [2019-11-06 22:29:52,966 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:29:52,974 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:29:52,985 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:29:53,026 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:29:53,027 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:29:53,028 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:29:53,028 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:29:53,029 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:29:53,029 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:29:53,029 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:29:53,029 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:29:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:29:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 22:29:53,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:53,088 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, 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 22:29:53,090 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:53,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:53,096 INFO L82 PathProgramCache]: Analyzing trace with hash -665077081, now seen corresponding path program 1 times [2019-11-06 22:29:53,106 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:53,106 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945193621] [2019-11-06 22:29:53,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:53,577 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 22:29:53,577 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945193621] [2019-11-06 22:29:53,579 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:53,579 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:29:53,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556169969] [2019-11-06 22:29:53,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:53,590 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:53,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:29:53,613 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:29:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:54,554 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:29:54,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:54,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-11-06 22:29:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:54,586 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:29:54,587 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:29:54,597 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 22:29:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:29:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:29:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:29:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-11-06 22:29:54,695 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 125 [2019-11-06 22:29:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:54,696 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-11-06 22:29:54,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-11-06 22:29:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:29:54,701 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:54,701 INFO L410 BasicCegarLoop]: trace histogram [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, 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 22:29:54,701 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:54,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1811316394, now seen corresponding path program 1 times [2019-11-06 22:29:54,702 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:54,702 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487356246] [2019-11-06 22:29:54,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:54,840 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487356246] [2019-11-06 22:29:54,840 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:54,840 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:29:54,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252788849] [2019-11-06 22:29:54,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:29:54,843 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:54,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:29:54,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:29:54,844 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2019-11-06 22:29:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:55,593 INFO L93 Difference]: Finished difference Result 840 states and 1253 transitions. [2019-11-06 22:29:55,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:29:55,595 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2019-11-06 22:29:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:55,602 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:29:55,602 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:29:55,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:29:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:29:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2019-11-06 22:29:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 22:29:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 788 transitions. [2019-11-06 22:29:55,648 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 788 transitions. Word has length 134 [2019-11-06 22:29:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:55,648 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 788 transitions. [2019-11-06 22:29:55,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:29:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 788 transitions. [2019-11-06 22:29:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-06 22:29:55,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:55,653 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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 22:29:55,653 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:55,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1203912387, now seen corresponding path program 1 times [2019-11-06 22:29:55,654 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:55,654 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339664170] [2019-11-06 22:29:55,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:55,772 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339664170] [2019-11-06 22:29:55,773 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406715998] [2019-11-06 22:29:55,773 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 22:29:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:55,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:29:55,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:29:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:29:56,032 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:29:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:29:56,128 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:29:56,128 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:29:56,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990034872] [2019-11-06 22:29:56,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:56,135 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:29:56,136 INFO L87 Difference]: Start difference. First operand 558 states and 788 transitions. Second operand 3 states. [2019-11-06 22:29:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:56,707 INFO L93 Difference]: Finished difference Result 1521 states and 2173 transitions. [2019-11-06 22:29:56,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:56,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2019-11-06 22:29:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:56,715 INFO L225 Difference]: With dead ends: 1521 [2019-11-06 22:29:56,715 INFO L226 Difference]: Without dead ends: 969 [2019-11-06 22:29:56,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:29:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2019-11-06 22:29:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 969. [2019-11-06 22:29:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2019-11-06 22:29:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1329 transitions. [2019-11-06 22:29:56,770 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1329 transitions. Word has length 145 [2019-11-06 22:29:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:56,771 INFO L462 AbstractCegarLoop]: Abstraction has 969 states and 1329 transitions. [2019-11-06 22:29:56,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1329 transitions. [2019-11-06 22:29:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-06 22:29:56,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:56,776 INFO L410 BasicCegarLoop]: trace histogram [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, 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 22:29:56,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:29:56,982 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash 874887550, now seen corresponding path program 1 times [2019-11-06 22:29:56,983 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:56,984 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307789437] [2019-11-06 22:29:56,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:57,251 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307789437] [2019-11-06 22:29:57,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770356167] [2019-11-06 22:29:57,252 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 22:29:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:57,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:29:57,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:29:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:57,396 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:29:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:57,483 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:29:57,483 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-11-06 22:29:57,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379057351] [2019-11-06 22:29:57,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:57,485 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:57,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:57,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:29:57,486 INFO L87 Difference]: Start difference. First operand 969 states and 1329 transitions. Second operand 3 states. [2019-11-06 22:29:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:58,054 INFO L93 Difference]: Finished difference Result 2887 states and 4054 transitions. [2019-11-06 22:29:58,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:58,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2019-11-06 22:29:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:58,067 INFO L225 Difference]: With dead ends: 2887 [2019-11-06 22:29:58,067 INFO L226 Difference]: Without dead ends: 1924 [2019-11-06 22:29:58,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 289 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:29:58,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2019-11-06 22:29:58,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1654. [2019-11-06 22:29:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1654 states. [2019-11-06 22:29:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2226 transitions. [2019-11-06 22:29:58,133 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2226 transitions. Word has length 144 [2019-11-06 22:29:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:58,134 INFO L462 AbstractCegarLoop]: Abstraction has 1654 states and 2226 transitions. [2019-11-06 22:29:58,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2226 transitions. [2019-11-06 22:29:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 22:29:58,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:58,141 INFO L410 BasicCegarLoop]: trace histogram [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, 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 22:29:58,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:29:58,345 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1505528148, now seen corresponding path program 1 times [2019-11-06 22:29:58,346 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:58,346 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799109769] [2019-11-06 22:29:58,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:58,455 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799109769] [2019-11-06 22:29:58,455 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:58,456 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:29:58,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709068529] [2019-11-06 22:29:58,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:29:58,457 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:58,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:29:58,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:29:58,457 INFO L87 Difference]: Start difference. First operand 1654 states and 2226 transitions. Second operand 6 states. [2019-11-06 22:29:59,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:59,244 INFO L93 Difference]: Finished difference Result 4154 states and 5746 transitions. [2019-11-06 22:29:59,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:29:59,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-11-06 22:29:59,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:59,258 INFO L225 Difference]: With dead ends: 4154 [2019-11-06 22:29:59,258 INFO L226 Difference]: Without dead ends: 2506 [2019-11-06 22:29:59,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:29:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2019-11-06 22:29:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2498. [2019-11-06 22:29:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2498 states. [2019-11-06 22:29:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3355 transitions. [2019-11-06 22:29:59,334 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3355 transitions. Word has length 153 [2019-11-06 22:29:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:59,334 INFO L462 AbstractCegarLoop]: Abstraction has 2498 states and 3355 transitions. [2019-11-06 22:29:59,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:29:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3355 transitions. [2019-11-06 22:29:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-06 22:29:59,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:59,343 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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 22:29:59,343 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:59,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:59,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1683572581, now seen corresponding path program 1 times [2019-11-06 22:29:59,344 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:59,344 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471002624] [2019-11-06 22:29:59,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:59,472 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471002624] [2019-11-06 22:29:59,472 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566678029] [2019-11-06 22:29:59,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:29:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:59,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:29:59,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:29:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:59,681 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:29:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:59,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [408676223] [2019-11-06 22:29:59,785 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 165 [2019-11-06 22:29:59,835 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:29:59,835 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)