/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/Problem18_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:57:15,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:57:15,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:57:15,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:57:15,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:57:15,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:57:15,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:57:15,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:57:15,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:57:15,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:57:15,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:57:15,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:57:15,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:57:15,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:57:15,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:57:15,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:57:15,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:57:15,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:57:15,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:57:15,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:57:15,717 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 22:57:15,733 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:57:15,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:57:15,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:57:15,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:57:15,735 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:57:15,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:57:15,735 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:57:15,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:57:15,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:57:15,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:57:15,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:57:15,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:57:15,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:57:15,737 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:57:15,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:57:15,737 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:57:15,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:57:15,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:57:15,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:57:15,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:57:15,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:57:15,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:57:15,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:57:15,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:57:15,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:57:15,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:57:15,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:57:15,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:57:15,740 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 22:57:16,066 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:57:16,087 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:57:16,091 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:57:16,092 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:57:16,093 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:57:16,094 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label23.c [2019-11-06 22:57:16,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347fd856d/827b8905de414681bba92d54593ccd8b/FLAG6fb365306 [2019-11-06 22:57:16,883 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:57:16,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label23.c [2019-11-06 22:57:16,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347fd856d/827b8905de414681bba92d54593ccd8b/FLAG6fb365306 [2019-11-06 22:57:17,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347fd856d/827b8905de414681bba92d54593ccd8b [2019-11-06 22:57:17,041 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:57:17,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:57:17,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:17,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:57:17,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:57:17,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:17" (1/1) ... [2019-11-06 22:57:17,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589e19e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:17, skipping insertion in model container [2019-11-06 22:57:17,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:17" (1/1) ... [2019-11-06 22:57:17,060 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:57:17,188 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:57:18,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:18,443 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:57:18,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:18,960 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:57:18,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:18 WrapperNode [2019-11-06 22:57:18,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:18,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:57:18,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:57:18,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:57:18,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:18" (1/1) ... [2019-11-06 22:57:18,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:18" (1/1) ... [2019-11-06 22:57:19,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:18" (1/1) ... [2019-11-06 22:57:19,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:18" (1/1) ... [2019-11-06 22:57:19,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:18" (1/1) ... [2019-11-06 22:57:19,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:18" (1/1) ... [2019-11-06 22:57:19,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:18" (1/1) ... [2019-11-06 22:57:19,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:57:19,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:57:19,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:57:19,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:57:19,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:18" (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 22:57:19,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:57:19,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:57:19,274 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:57:19,274 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:57:19,274 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:57:19,275 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:57:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:57:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:57:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:57:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:57:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:57:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:57:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:57:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:57:19,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:57:22,991 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:57:22,991 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:57:22,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:22 BoogieIcfgContainer [2019-11-06 22:57:22,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:57:22,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:57:22,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:57:23,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:57:23,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:17" (1/3) ... [2019-11-06 22:57:23,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352ec2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:23, skipping insertion in model container [2019-11-06 22:57:23,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:18" (2/3) ... [2019-11-06 22:57:23,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352ec2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:23, skipping insertion in model container [2019-11-06 22:57:23,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:22" (3/3) ... [2019-11-06 22:57:23,093 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label23.c [2019-11-06 22:57:23,110 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:57:23,121 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:57:23,133 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:57:23,178 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:57:23,179 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:57:23,179 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:57:23,179 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:57:23,179 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:57:23,179 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:57:23,179 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:57:23,180 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:57:23,222 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:57:23,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 22:57:23,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:23,234 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] [2019-11-06 22:57:23,237 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1957259726, now seen corresponding path program 1 times [2019-11-06 22:57:23,253 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:23,254 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613890606] [2019-11-06 22:57:23,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:23,709 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 22:57:23,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613890606] [2019-11-06 22:57:23,712 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:23,712 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:57:23,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912675878] [2019-11-06 22:57:23,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:57:23,722 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:23,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:57:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:57:23,741 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:57:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:28,537 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:57:28,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:57:28,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2019-11-06 22:57:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:28,573 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:57:28,573 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:57:28,584 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 22:57:28,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:57:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:57:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:57:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-11-06 22:57:28,733 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 61 [2019-11-06 22:57:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:28,736 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-11-06 22:57:28,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:57:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-11-06 22:57:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:57:28,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:28,751 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, 2, 2, 2, 2, 2, 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] [2019-11-06 22:57:28,751 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:28,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2051582907, now seen corresponding path program 1 times [2019-11-06 22:57:28,752 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:28,752 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051954437] [2019-11-06 22:57:28,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:28,968 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051954437] [2019-11-06 22:57:28,969 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:28,969 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:57:28,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509498957] [2019-11-06 22:57:28,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:57:28,971 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:28,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:57:28,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:57:28,972 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-11-06 22:57:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:34,645 INFO L93 Difference]: Finished difference Result 3572 states and 6416 transitions. [2019-11-06 22:57:34,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:34,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-11-06 22:57:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:34,666 INFO L225 Difference]: With dead ends: 3572 [2019-11-06 22:57:34,667 INFO L226 Difference]: Without dead ends: 2166 [2019-11-06 22:57:34,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 22:57:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-11-06 22:57:34,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-11-06 22:57:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-11-06 22:57:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-11-06 22:57:34,750 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 132 [2019-11-06 22:57:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:34,753 INFO L462 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-11-06 22:57:34,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:57:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-11-06 22:57:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-06 22:57:34,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:34,758 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, 2, 2, 2, 2, 2, 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] [2019-11-06 22:57:34,759 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:34,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1912923174, now seen corresponding path program 1 times [2019-11-06 22:57:34,760 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:34,760 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124637200] [2019-11-06 22:57:34,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:35,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124637200] [2019-11-06 22:57:35,035 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:35,035 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:35,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994804871] [2019-11-06 22:57:35,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:35,036 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:35,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:35,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:35,037 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-11-06 22:57:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:40,272 INFO L93 Difference]: Finished difference Result 5051 states and 8506 transitions. [2019-11-06 22:57:40,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:40,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-11-06 22:57:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:40,297 INFO L225 Difference]: With dead ends: 5051 [2019-11-06 22:57:40,297 INFO L226 Difference]: Without dead ends: 2911 [2019-11-06 22:57:40,303 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 22:57:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-11-06 22:57:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-11-06 22:57:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-11-06 22:57:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-11-06 22:57:40,416 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 155 [2019-11-06 22:57:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:40,418 INFO L462 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-11-06 22:57:40,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-11-06 22:57:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 22:57:40,421 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:40,421 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, 2, 2, 2, 2, 2, 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] [2019-11-06 22:57:40,421 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash -775273618, now seen corresponding path program 1 times [2019-11-06 22:57:40,422 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:40,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073528470] [2019-11-06 22:57:40,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:40,639 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073528470] [2019-11-06 22:57:40,640 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:40,640 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:40,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216199897] [2019-11-06 22:57:40,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:40,641 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:40,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:40,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:40,641 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-11-06 22:57:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:45,534 INFO L93 Difference]: Finished difference Result 6543 states and 10148 transitions. [2019-11-06 22:57:45,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:45,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-11-06 22:57:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:45,550 INFO L225 Difference]: With dead ends: 6543 [2019-11-06 22:57:45,551 INFO L226 Difference]: Without dead ends: 3662 [2019-11-06 22:57:45,557 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 22:57:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-11-06 22:57:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-11-06 22:57:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-11-06 22:57:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-11-06 22:57:45,640 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 159 [2019-11-06 22:57:45,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:45,640 INFO L462 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-11-06 22:57:45,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-11-06 22:57:45,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-06 22:57:45,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:45,644 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, 2, 2, 2, 2, 2, 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] [2019-11-06 22:57:45,644 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:45,645 INFO L82 PathProgramCache]: Analyzing trace with hash -134030449, now seen corresponding path program 1 times [2019-11-06 22:57:45,645 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:45,645 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363654448] [2019-11-06 22:57:45,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:45,803 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363654448] [2019-11-06 22:57:45,803 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:45,803 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:45,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369849507] [2019-11-06 22:57:45,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:45,804 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:45,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:45,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:45,805 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-11-06 22:57:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:51,101 INFO L93 Difference]: Finished difference Result 10404 states and 14982 transitions. [2019-11-06 22:57:51,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:51,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2019-11-06 22:57:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:51,136 INFO L225 Difference]: With dead ends: 10404 [2019-11-06 22:57:51,137 INFO L226 Difference]: Without dead ends: 6768 [2019-11-06 22:57:51,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 22:57:51,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-11-06 22:57:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-11-06 22:57:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-11-06 22:57:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-11-06 22:57:51,322 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 190 [2019-11-06 22:57:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:51,322 INFO L462 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-11-06 22:57:51,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-11-06 22:57:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-11-06 22:57:51,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:51,331 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:57:51,331 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:51,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:51,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1362369649, now seen corresponding path program 1 times [2019-11-06 22:57:51,332 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:51,332 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838978294] [2019-11-06 22:57:51,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:57:51,523 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838978294] [2019-11-06 22:57:51,524 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903638493] [2019-11-06 22:57:51,524 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 22:57:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:51,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:57:51,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:57:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 22:57:51,789 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:57:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:57:51,931 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:57:51,931 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:57:51,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025303147] [2019-11-06 22:57:51,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:57:51,932 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:51,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:57:51,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:51,933 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 5 states.